refactor: #85 T5 extrait le domaine search vers backend/routers + executor partage (comportement inchange)

Fusionne la section 2.26.0 (jamais publiée) dans 2.27.0 et corrige la ligne
index de la roadmap ; suppression du tag local v2.26.0.

CHANGELOG.md

@@ -6,7 +6,7 @@ Format basé sur [Keep a Changelog](https://keepachangelog.com/fr/1.1.0/),
 et [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 > **En cours de développement** : les changements à venir sont listés dans la section
-> [Unreleased](#unreleased). La dernière version livrée est **2.25.0**.
+> [Unreleased](#unreleased). La dernière version livrée est **2.27.6**.
 
 ---
 
@@ -14,6 +14,98 @@ et [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ---
 
+## [2.27.6] — 2026-09-26
+
+---
+
+## [2.27.5] — 2026-09-26
+
+---
+
+## [2.27.4] — 2026-09-26
+
+---
+
+## [2.27.3] — 2026-09-26
+
+---
+
+## [2.27.2] — 2026-09-26
+
+### Modifié
+
+- **#85 (T5) — extraction du domaine `search` hors du monolithe `backend/main.py`.**
+  Les 11 routes (`/api/search`, `/advanced`, `/replace`, `/tags`,
+  `/tree-search`, `/vault/{vault}/paths`, `/suggest`, `/tags/suggest`,
+  `/graph/{vault}`, `/index/reload`, `/index/reload/{vault}`) sont servies
+  par le nouveau `backend/routers/search.py` ; les modèles search dans
+  `schemas.py` et le pool de threads dans `backend/search_executor.py`
+  (même dimensionnement, même cycle de vie) — comportement inchangé.
+- **#85 (T4) — extraction du domaine `backups` hors du monolithe `backend/main.py`.**
+  Les 9 routes (`/api/file/{vault}/backups|diff|restore`, `/api/backups`,
+  `/delete`, `/purge`, `/content`, `/compress`, `/auto`) sont servies par le
+  nouveau `backend/routers/backups.py` ; `Diff/Restore*` déménagent dans
+  `schemas.py` et le singleton SSE dans `backend/sse.py` (partagé avec
+  `main`) — comportement inchangé, aucun impact utilisateur.
+- **#85 (T3) — extraction du domaine `sharing` hors du monolithe `backend/main.py`.**
+  `POST /api/share/{vault}`, `GET /api/shares`, `DELETE /api/share/{share_id}`
+  et les pages publiques `/s/{token}`, `/s/{token}/raw`, `/s/{token}/pdf`
+  sont servis par le nouveau `backend/routers/sharing.py` — chemins,
+  réponses, tags OpenAPI et authentification inchangés (aucun impact
+  utilisateur).
+- **#85 (T2) — extraction du domaine `webhooks` hors du monolithe `backend/main.py`.**
+  Le CRUD `GET/POST/PATCH/DELETE /api/webhooks` (admin) est servi par le
+  nouveau `backend/routers/webhooks.py` — chemins, réponses, tags OpenAPI et
+  authentification inchangés (aucun impact utilisateur).
+- **#85 (T1) — extraction du domaine `health` hors du monolithe `backend/main.py`.**
+  `GET /api/health` et `GET /api/health/detailed` (admin) sont servis par le
+  nouveau `backend/routers/health.py` (monté dans `main.py`) et le modèle
+  `HealthResponse` déménage dans `backend/schemas.py` — chemins, réponses,
+  tags OpenAPI et authentification inchangés (aucun impact utilisateur).
+
+---
+
+## [2.27.1] — 2026-09-26
+
+### Modifié
+
+- **Roadmap — priorisation dette & sécurité (décisions 2026-09-26).**
+  Items #85 (refonte architecturale) et #87 (CI/CD) détaillés et marqués
+  prioritaires : `backend/main.py` mesuré à ~4 827 lignes, `tools/registry.py`
+  à créer, persistance SQLite/Redis, verrous asyncio, audit des `except`
+  larges, CI sécurité bloquante (bandit/semgrep/trivy, audits pip/npm),
+  finition CSP nonce (BUG-034), cookies `Secure` par défaut, rotation clé
+  DeepSeek à confirmer (BUG-006). #73 Sync reporté (P4, hors chemin
+  critique) ; desktop #77 confirmé non signé + doc SmartScreen, reste les
+  6 tests E2E manuels. Corrections : sections livrées #83/#84 retirées du
+  backlog (détail dans l'archive, index inchangé), total restant recalculé
+  (~12-18 jours chemin critique : #77 fin + #85 + #87).
+
+---
+
+## [2.27.0] — 2026-09-25
+
+### Ajouté
+
+- **#152 — Viewer XLSX** : affichage des fichiers `.xlsx` en tableaux multi-feuilles (onglets,
+  en-têtes A1), édition inline des cellules avec `PUT /api/file/{vault}/xlsx/save` (backup avant
+  écriture, coercion numérique) et téléchargement du fichier d'origine.
+
+---
+
+## [2.25.1] — 2026-09-24
+
+### Corrigé
+
+- **`/api/diagnostics` — erreur 500 « dictionary changed size during iteration ».**
+  Le calcul des statistiques d'index itérait `inv.word_index` et `index` en
+  direct, pendant que l'indexeur les modifiait depuis un autre thread (build au
+  démarrage, hooks incrémentaux) : l'itérateur de dict levait `RuntimeError` et
+  l'endpoint renvoyait 500. Les deux dicts sont désormais **copiés avant
+  itération** (copie atomique sous le GIL), ce qui supprime la course.
+
+---
+
 ## [2.25.0] — 2026-09-24
 
 ### Ajouté

README.fr.md

@@ -4,7 +4,7 @@
 
 **Porte d'entrée web ultra-léger pour vos vaults Obsidian** — Accédez, naviguez et recherchez dans toutes vos notes Obsidian depuis n'importe quel appareil via une interface web moderne et responsive.
 
-[![Version](https://img.shields.io/badge/Version-2.25.0-blue.svg)]()
+[![Version](https://img.shields.io/badge/Version-2.27.6-blue.svg)]()
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![Docker](https://img.shields.io/badge/Docker-Ready-blue.svg)](https://www.docker.com/)
 [![Python](https://img.shields.io/badge/Python-3.11+-green.svg)](https://www.python.org/)
@@ -85,6 +85,7 @@ Les **guides d'utilisation** pas à pas se trouvent dans [`docs/GUIDES/`](docs/G
 - **🖼️ Images Obsidian** : Support complet des syntaxes d'images Obsidian avec résolution intelligente
 - **🎬 Audio & vidéo** : Lecteurs HTML5 intégrés (`.mp3 .wav .flac .mp4 .webm`…) avec streaming HTTP Range (lecture, déplacement, plein écran) et **lecture persistante** (mini-lecteur flottant / mini-fenêtre vidéo, retour au média ou arrêt à tout moment, contrôles écran verrouillé via Media Session), repli téléchargement si le format n'est pas lisible par le navigateur
 - **🎨 Diagrammes Excalidraw** : Visualiseur/éditeur natif des fichiers `.excalidraw` et `.excalidraw.md` (iframe sandboxée, auto-save, thème clair/sombre, texte des diagrammes indexé pour la recherche)
+- **📊 Tableurs Excel** : les fichiers `.xlsx` s'ouvrent dans un visualiseur dédié — un tableau par feuille avec onglets, en-têtes A1 et édition directe des cellules (`PUT /api/file/{vault}/xlsx/save`, backup automatique), plus le téléchargement du fichier d'origine
 - **🎨 Syntax highlight** : Coloration syntaxique des blocs de code
 - **🌓 Thème clair/sombre** : Toggle persisté en localStorage
 - **📡 Synchronisation temps réel** : Surveillance automatique des fichiers via watchdog avec mise à jour incrémentale de l'index
@@ -975,8 +976,8 @@ Ce projet est sous licence **MIT** — voir le fichier [LICENSE](LICENSE) pour l
 
 ## 📝 Changelog
 
-Consultez le [CHANGELOG.md](./CHANGELOG.md) pour l'historique complet de toutes les versions (v1.0.0 → v2.25.0).
+Consultez le [CHANGELOG.md](./CHANGELOG.md) pour l'historique complet de toutes les versions (v1.0.0 → v2.27.6).
 
 ---
 
-*Projet : ObsiGate | Version : 2.25.0 | Dernière mise à jour : Septembre 2026*
+*Projet : ObsiGate | Version : 2.27.6 | Dernière mise à jour : Septembre 2026*

README.md

@@ -2,7 +2,7 @@
 
 **Ultra-light web gateway for your Obsidian vaults** — Access, browse, and search all your Obsidian notes from any device via a modern, responsive web interface.
 
-[![Version](https://img.shields.io/badge/Version-2.25.0-blue.svg)]()
+[![Version](https://img.shields.io/badge/Version-2.27.6-blue.svg)]()
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![Docker](https://img.shields.io/badge/Docker-Ready-blue.svg)](https://www.docker.com/)
 [![Python](https://img.shields.io/badge/Python-3.11+-green.svg)](https://www.python.org/)
@@ -84,6 +84,7 @@ Step-by-step **user guides** live in [`docs/GUIDES/`](docs/GUIDES/):
 - **🖼️ Obsidian Images** : Full support for all Obsidian image syntaxes with intelligent resolution
 - **🎬 Audio & video** : Built-in HTML5 players (`.mp3 .wav .flac .mp4 .webm`…) with HTTP Range streaming (play, seek, fullscreen) and **persistent playback** (floating mini-player / mini video window, return to media or stop anytime, lock-screen controls via Media Session), falling back to download when the format is not playable in the browser
 - **🎨 Excalidraw Diagrams** : Native viewer/editor for `.excalidraw` and `.excalidraw.md` files (sandboxed iframe, autosave, dark/light theme, diagram text indexed for search)
+- **📊 Excel Spreadsheets** : `.xlsx` files open in a dedicated viewer — one table per sheet with tabs, A1 headers and inline cell editing (`PUT /api/file/{vault}/xlsx/save`, automatic backup), plus download of the original file
 - **🎨 Syntax Highlight** : Syntax highlighting for code blocks
 - **🌓 Light/Dark Theme** : Toggle persisted in localStorage
 - **📡 Real-time Sync** : Automatic file monitoring via watchdog with incremental index updates
@@ -1150,8 +1151,8 @@ This project is licensed under the **MIT License** - see the [LICENSE](LICENSE)
 
 ## 📝 Changelog
 
-See [CHANGELOG.md](./CHANGELOG.md) for the complete version history (v1.0.0 → v2.25.0).
+See [CHANGELOG.md](./CHANGELOG.md) for the complete version history (v1.0.0 → v2.27.6).
 
 ---
 
-*Project: ObsiGate | Version: 2.25.0 | Last updated: September 2026*
+*Project: ObsiGate | Version: 2.27.6 | Last updated: September 2026*

VERSION

@@ -1 +1 @@
-2.25.0
+2.27.6

backend/indexer.py

@@ -65,6 +65,7 @@ SUPPORTED_EXTENSIONS = {
     ".sh", ".bash", ".zsh", ".fish", ".bat", ".cmd", ".ps1",
     ".json", ".yaml", ".yml", ".toml", ".xml", ".csv",
     ".cfg", ".ini", ".conf", ".env", ".pdf",
+    ".xlsx",
     ".html", ".css", ".scss", ".less",
     ".java", ".c", ".cpp", ".h", ".hpp", ".cs", ".go", ".rs", ".rb",
     ".php", ".sql", ".r", ".m", ".swift", ".kt",
@@ -559,6 +560,12 @@ def _scan_vault(
                     raw = ""
                     title = fpath.stem.replace("-", " ").replace("_", " ")
                     content_preview = ""
+                elif ext == ".xlsx":
+                    # #152 — binary workbook: metadata only, the viewer renders
+                    # it (parity with _index_single_file_sync).
+                    raw = ""
+                    title = fpath.stem.replace("-", " ").replace("_", " ")
+                    content_preview = ""
                 else:
                     raw = fpath.read_text(encoding="utf-8", errors="replace")
                     title = fpath.stem.replace("-", " ").replace("_", " ")
@@ -947,6 +954,10 @@ def _index_single_file_sync(vault_name: str, vault_path: str, file_path: str, va
             # #108 — binary media: metadata only, never read the bytes.
             raw = ""
             content_preview = ""
+        elif ext == ".xlsx":
+            # #152 — binary workbook: metadata only (parity with _scan_vault).
+            raw = ""
+            content_preview = ""
         else:
             raw = fpath.read_text(encoding="utf-8", errors="replace")
             content_preview = raw[:200].strip()

backend/openapi_docs.py

@@ -181,6 +181,10 @@ _ENDPOINT_EXAMPLES: dict[tuple[str, str], dict[str, Any]] = {
         "request": {"path": "notes/Accueil.md", "content": "# Accueil\n\nMis à jour."},
         "response": {"status": "ok", "vault": "TestVault", "path": "notes/Accueil.md", "size": 26},
     },
+    ("put", "/api/file/{vault_name}/xlsx/save"): {
+        "request": {"sheet": "Budget", "cells": {"B1": "250"}},
+        "response": {"status": "ok", "vault": "TestVault", "path": "data/budget.xlsx", "size": 1},
+    },
     ("post", "/api/search/replace"): {
         "request": {"query": "Python", "replacement": "Python 3", "vault": "all", "dry_run": True},
         "response": {"matches": [{"vault": "TestVault", "path": "note1.md", "title": "Python", "match_count": 3}], "total_matches": 3, "dry_run": True},

backend/routers/__init__.py

@@ -0,0 +1,7 @@
+"""ObsiGate — routers FastAPI par domaine (ROADMAP #85).
+
+Découpage progressif du monolithe ``backend/main.py`` : chaque module de ce
+paquet expose un ``APIRouter`` monté par ``main.py``. Les handlers sont
+déplacés sans changement de comportement (mêmes chemins, mêmes modèles de
+réponse, mêmes dépendances d'authentification).
+"""

backend/routers/backups.py

@@ -0,0 +1,412 @@
+"""Backup endpoints (ROADMAP #85, tranche 4).
+
+Handlers déplacés depuis :mod:`backend.main` sans changement de
+comportement : mêmes chemins (``/api/file/{vault}/backups|diff|restore``,
+``/api/backups*``), mêmes modèles de réponse, mêmes dépendances
+d'authentification. La logique métier vit déjà dans
+:mod:`backend.services.backups`.
+
+Adaptations strictement équivalentes :
+- ``_resolve_safe_path`` / ``_backup_file`` / ``_list_backup_files`` de
+  ``main`` n'étaient que des wrappers directs : appelés ici via
+  :mod:`backend.services.paths` et :mod:`backend.services.backups`.
+- ``RestoreRequest`` / ``RestoreResponse`` / ``DiffResponse`` ont déménagé
+  dans :mod:`backend.schemas`.
+- Le singleton SSE vit désormais dans :mod:`backend.sse` (partagé avec
+  ``main`` : les clients ``/api/events`` reçoivent les mêmes broadcasts).
+"""
+
+import logging
+import os
+import time
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Any
+
+from fastapi import APIRouter, Body, Depends, HTTPException, Query
+
+from backend.auth.middleware import check_vault_access, require_auth
+from backend.indexer import get_vault_data, index, update_single_file
+from backend.schemas import (
+    BackupContentResponse,
+    BackupsAutoResponse,
+    BackupsCompressResponse,
+    BackupsDeletedResponse,
+    BackupsListResponse,
+    BackupsResponse,
+    DiffResponse,
+    RestoreRequest,
+    RestoreResponse,
+)
+from backend.services.backups import (
+    create_backup,
+)
+from backend.services.backups import (
+    diff_backup as service_diff_backup,
+)
+from backend.services.backups import (
+    list_backup_files as service_list_backup_files,
+)
+from backend.services.mutations import (
+    restore_backup as service_restore_backup,
+)
+from backend.services.paths import resolve_safe_path
+from backend.sse import sse_manager
+from backend.webhooks import dispatch_webhooks
+
+logger = logging.getLogger("obsigate")
+
+router = APIRouter(tags=["backups"])
+
+
+@router.get("/api/file/{vault_name}/backups", response_model=BackupsResponse)
+async def api_file_backups(
+    vault_name: str,
+    path: str = Query(..., description="Relative path to file"),
+    current_user=Depends(require_auth),
+):
+    """List all available backups for a file.
+
+    Args:
+        vault_name: Name of the vault.
+        path: Relative path of the file within the vault.
+
+    Returns:
+        BackupListResponse with backups sorted newest first.
+    """
+    if not check_vault_access(vault_name, current_user):
+        raise HTTPException(status_code=403, detail=f"Accès refusé à la vault '{vault_name}'")
+
+    vault_data = get_vault_data(vault_name)
+    if not vault_data:
+        raise HTTPException(status_code=404, detail=f"Vault '{vault_name}' not found")
+
+    vault_root = Path(vault_data["path"])
+    file_path = resolve_safe_path(vault_root, path)
+
+    if not file_path.exists() or not file_path.is_file():
+        raise HTTPException(status_code=404, detail=f"File not found: {path}")
+
+    try:
+        backups = service_list_backup_files(vault_name, path)
+    except Exception as e:
+        logger.error(f"Error listing backups for {vault_name}/{path}: {type(e).__name__}: {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Erreur lors de la lecture des backups: {e!s}")
+
+    return {"vault": vault_name, "path": path, "backups": backups}
+
+
+@router.get("/api/file/{vault_name}/diff", response_model=DiffResponse)
+async def api_file_diff(
+    vault_name: str,
+    path: str = Query(..., description="Relative path to file"),
+    version: int = Query(..., description="Timestamp of the backup version (left/old side)"),
+    compare_with: int | None = Query(default=None, description="Timestamp of another backup (right/new side). If omitted, compares with the current file."),
+    current_user=Depends(require_auth),
+):
+    """Generate a unified diff between a backup version and another version or the current file.
+
+    Args:
+        vault_name: Name of the vault.
+        path: Relative path of the file within the vault.
+        version: Timestamp of the backup to use as the old/left side.
+        compare_with: Optional timestamp of another backup as the new/right side.
+                       If omitted, the current file on disk is used.
+
+    Returns:
+        DiffResponse containing the unified diff string.
+    """
+    if not check_vault_access(vault_name, current_user):
+        raise HTTPException(status_code=403, detail=f"Accès refusé à la vault '{vault_name}'")
+
+    return service_diff_backup(vault_name, path, version, compare_with)
+
+
+@router.post("/api/file/{vault_name}/restore", response_model=RestoreResponse)
+async def api_file_restore(
+    vault_name: str,
+    path: str = Query(..., description="Relative path to file"),
+    body: RestoreRequest = ..., # type: ignore
+    current_user=Depends(require_auth),
+):
+    """Restore a file from a backup version.
+
+    The current file is backed up before being overwritten (so the operation is reversible).
+
+    Args:
+        vault_name: Name of the vault.
+        path: Relative path of the file within the vault.
+        body: RestoreRequest with the backup version timestamp.
+
+    Returns:
+        RestoreResponse confirming the restore.
+    """
+    if not check_vault_access(vault_name, current_user):
+        raise HTTPException(status_code=403, detail=f"Accès refusé à la vault '{vault_name}'")
+
+    result = service_restore_backup(vault_name, path, body.version)
+    current_backed_up = result["current_backed_up"]
+
+    # Update index
+    await update_single_file(vault_name, path)
+
+    # Broadcast SSE event
+    await sse_manager.broadcast("file_restored", {
+        "vault": vault_name,
+        "path": path,
+        "restored_from": body.version,
+        "current_backed_up": current_backed_up,
+    })
+    await dispatch_webhooks("file_restored", {"vault": vault_name, "path": path, "restored_from": body.version})
+
+    return {
+        "success": True,
+        "vault": vault_name,
+        "path": path,
+        "restored_from": body.version,
+        "current_backed_up": current_backed_up,
+    }
+
+
+@router.get("/api/backups", response_model=BackupsListResponse)
+async def api_backups_list(
+    vault: str | None = Query(None, description="Filter by vault name"),
+    current_user=Depends(require_auth),
+):
+    """List all backups across vaults, grouped by file."""
+    result: list[dict[str, Any]] = []
+    try:
+      for vault_name in index:
+        if vault and vault_name != vault:
+            continue
+        if not check_vault_access(vault_name, current_user):
+            continue
+        vd = get_vault_data(vault_name)
+        if not vd:
+            continue
+        vault_root = Path(vd["path"])
+        backup_root = Path(os.environ.get("OBSIGATE_BACKUP_DIR", ".obsigate-backup"))
+        if not backup_root.is_absolute():
+            backup_root = vault_root / backup_root
+        vault_backup_dir = backup_root / vault_name
+        if not vault_backup_dir.exists():
+            continue
+        for fpath in vault_backup_dir.rglob("*.bak"):
+            if not fpath.is_file():
+                continue
+            st = fpath.stat()
+            fsize = st.st_size
+            ts_part = fpath.name.rsplit(".", 2)
+            if len(ts_part) < 3 or not ts_part[-2].isdigit():
+                continue
+            ts = int(ts_part[-2])
+            rel_dir = str(fpath.parent.relative_to(vault_backup_dir)).replace("\\", "/")
+            rel_file = rel_dir + "/" + ts_part[0] if rel_dir != "." else ts_part[0]
+            result.append({
+                "vault": vault_name,
+                "file": rel_file,
+                "backup_file": fpath.name,
+                "timestamp": ts,
+                "datetime": datetime.fromtimestamp(ts, tz=timezone.utc).isoformat(),
+                "size": fsize,
+                "full_path": str(fpath),
+            })
+
+      result.sort(key=lambda x: x["timestamp"], reverse=True)
+      total_size = sum(r["size"] for r in result)
+      return {"backups": result, "total": len(result), "total_size_bytes": total_size}
+    except Exception as e:
+        logger.error(f"Error listing backups: {type(e).__name__}: {e}", exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Erreur listing backups: {e!s}")
+
+
+@router.post("/api/backups/delete", response_model=BackupsDeletedResponse)
+async def api_backups_delete(
+    body: dict = Body(...),
+    current_user=Depends(require_auth),
+):
+    """Delete one or more backup files."""
+    paths = body.get("paths", [])
+    if not paths:
+        raise HTTPException(status_code=400, detail="No backup paths provided")
+
+    deleted = 0
+    for p in paths:
+        try:
+            fpath = Path(p)
+            # Security: ensure path is within a backup directory
+            if ".obsigate-backup" not in str(fpath):
+                continue
+            if fpath.exists() and fpath.is_file():
+                fpath.unlink()
+                deleted += 1
+        except Exception as e:
+            logger.warning(f"Failed to delete backup {p}: {e}")
+
+    return {"deleted": deleted}
+
+
+@router.post("/api/backups/purge", response_model=BackupsDeletedResponse)
+async def api_backups_purge(
+    body: dict = Body(...),
+    current_user=Depends(require_auth),
+):
+    """Purge all backups for a specific file or entire vault."""
+    vault_name = body.get("vault")
+    file_path = body.get("file")  # optional
+
+    if not vault_name:
+        raise HTTPException(status_code=400, detail="Vault name required")
+
+    if not check_vault_access(vault_name, current_user):
+        raise HTTPException(status_code=403, detail="Access denied")
+
+    vd = get_vault_data(vault_name)
+    if not vd:
+        raise HTTPException(status_code=404, detail="Vault not found")
+
+    vault_root = Path(vd["path"])
+    backup_root = Path(os.environ.get("OBSIGATE_BACKUP_DIR", ".obsigate-backup"))
+    if not backup_root.is_absolute():
+        backup_root = vault_root / backup_root
+
+    if file_path:
+        # Delete backups for specific file
+        backup_dir = backup_root / vault_name / Path(file_path).parent
+        if backup_dir.exists():
+            fname = Path(file_path).name
+            deleted = 0
+            for f in backup_dir.iterdir():
+                if f.is_file() and f.name.startswith(fname + ".") and f.name.endswith(".bak"):
+                    f.unlink()
+                    deleted += 1
+            return {"deleted": deleted}
+        return {"deleted": 0}
+    else:
+        # Delete all backups for vault
+        vault_backup_dir = backup_root / vault_name
+        if vault_backup_dir.exists():
+            deleted = 0
+            for f in vault_backup_dir.rglob("*.bak"):
+                if f.is_file():
+                    f.unlink()
+                    deleted += 1
+            return {"deleted": deleted}
+        return {"deleted": 0}
+
+
+
+@router.get("/api/backups/content", response_model=BackupContentResponse)
+async def api_backups_content(
+    path: str = Query(..., description="Full path to backup file"),
+    current_user=Depends(require_auth),
+):
+    """Return the content of a specific backup file."""
+    try:
+        fpath = Path(path)
+        if ".obsigate-backup" not in str(fpath):
+            raise HTTPException(status_code=403, detail="Access denied")
+        if not fpath.exists() or not fpath.is_file():
+            raise HTTPException(status_code=404, detail="Backup not found")
+        content = fpath.read_text(encoding="utf-8", errors="replace")
+        # Truncate large files to 100KB
+        if len(content) > 102400:
+            content = content[:102400] + "\n\n... (tronque a 100 Ko)"
+        return {"content": content, "name": fpath.name, "size": len(content)}
+    except HTTPException:
+        raise
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.post("/api/backups/compress", response_model=BackupsCompressResponse)
+async def api_backups_compress(
+    body: dict = Body(...),
+    current_user=Depends(require_auth),
+):
+    """Compress backups older than N days. Body: {older_than_days: 30, dry_run: false}"""
+    import gzip as gz_mod
+    older_than = body.get("older_than_days", 30)
+    dry_run = body.get("dry_run", False)
+    cutoff = time.time() - (older_than * 86400)
+    compressed = 0
+    saved_bytes = 0
+
+    for vault_name in index:
+        if not check_vault_access(vault_name, current_user):
+            continue
+        vd = get_vault_data(vault_name)
+        if not vd:
+            continue
+        vault_root = Path(vd["path"])
+        backup_root = Path(os.environ.get("OBSIGATE_BACKUP_DIR", ".obsigate-backup"))
+        if not backup_root.is_absolute():
+            backup_root = vault_root / backup_root
+        vault_dir = backup_root / vault_name
+        if not vault_dir.exists():
+            continue
+        for fpath in vault_dir.rglob("*.bak"):
+            if not fpath.is_file():
+                continue
+            if fpath.name.endswith(".bak.gz"):
+                continue
+            mtime = fpath.stat().st_mtime
+            if mtime > cutoff:
+                continue
+            if not dry_run:
+                try:
+                    gz_path = fpath.with_suffix(fpath.suffix + ".gz")
+                    data = fpath.read_bytes()
+                    with gz_mod.open(str(gz_path), "wb", compresslevel=6) as gzf:
+                        gzf.write(data)
+                    orig_size = len(data)
+                    gz_size = gz_path.stat().st_size
+                    if gz_size < orig_size:
+                        fpath.unlink()
+                        saved_bytes += (orig_size - gz_size)
+                    else:
+                        gz_path.unlink()  # compression didn't help
+                    compressed += 1
+                except Exception as e:
+                    logger.warning(f"Failed to compress {fpath}: {e}")
+            else:
+                compressed += 1
+
+    return {"compressed": compressed, "saved_bytes": saved_bytes, "dry_run": dry_run}
+
+
+@router.post("/api/backups/auto", response_model=BackupsAutoResponse)
+async def api_backups_auto(
+    body: dict = Body(...),
+    current_user=Depends(require_auth),
+):
+    """Create backups for files modified since a given time. Body: {since_hours: 24}"""
+    since_hours = body.get("since_hours", 24)
+    cutoff = time.time() - (since_hours * 3600)
+    backed_up = 0
+
+    for vault_name in index:
+        if not check_vault_access(vault_name, current_user):
+            continue
+        vd = get_vault_data(vault_name)
+        if not vd:
+            continue
+        vault_root = Path(vd["path"])
+        for fpath in vault_root.rglob("*"):
+            if not fpath.is_file():
+                continue
+            if fpath.name.startswith('.'):
+                continue
+            if any(p.startswith('.') or p in {'.obsidian', '.trash', '.git', '.obsigate-backup', '__pycache__', 'node_modules'} for p in fpath.relative_to(vault_root).parts):
+                continue
+            mtime = fpath.stat().st_mtime
+            if mtime < cutoff:
+                continue
+            try:
+                rel = str(fpath.relative_to(vault_root)).replace("\\", "/")
+                create_backup(fpath, vault_name, rel)
+                backed_up += 1
+            except Exception as e:
+                logger.warning(f"Auto-backup failed for {rel}: {e}")
+
+    return {"backed_up": backed_up, "since_hours": since_hours}

backend/routers/health.py

@@ -0,0 +1,143 @@
+"""System health endpoints (ROADMAP #85, tranche 1).
+
+Handlers déplacés depuis :mod:`backend.main` sans changement de
+comportement : mêmes chemins (``/api/health``, ``/api/health/detailed``),
+même ``response_model`` (:class:`backend.schemas.HealthResponse`), même
+dépendance admin. Seule différence : la version est lue via
+:func:`backend.version.get_version` au lieu de ``app.version`` (valeur
+identique, figée au démarrage depuis le fichier ``VERSION``).
+
+Note : ``uptime_seconds`` reprend l'expression d'origine
+(``'_SERVER_START_TIME' in globals()``), qui vaut toujours 0 — le global
+n'est défini nulle part dans ``backend.main`` (voir ``backend.admin`` qui
+possède son propre compteur). Ce comportement est préservé tel quel ; le
+corriger fera l'objet d'une tranche ultérieure avec test dédié.
+"""
+
+from fastapi import APIRouter, Depends
+
+from backend.auth.middleware import require_admin
+from backend.indexer import index
+from backend.schemas import HealthResponse
+from backend.version import get_git_commit, get_git_describe, get_version
+
+router = APIRouter(tags=["System"])
+
+
+@router.get("/api/health", response_model=HealthResponse)
+async def api_health():
+    """Health check endpoint for Docker and monitoring.
+
+    Returns:
+        Application status, version, vault count and total file count.
+    """
+    total_files = sum(len(v["files"]) for v in index.values())
+    total_tokens = sum(len(v.get("files", [])) * 1000 for v in index.values())  # rough approx
+    import time
+
+    from backend.indexer import _last_full_index_ts
+    # `_SERVER_START_TIME` n'existe dans aucun module (comportement d'origine
+    # préservé : uptime toujours 0 — voir docstring du module).
+    uptime = int(time.time() - _SERVER_START_TIME) if '_SERVER_START_TIME' in globals() else 0  # noqa: F821
+    return {
+        "status": "ok",
+        "version": get_version(),
+        "vaults": len(index),
+        "total_files": total_files,
+        "total_tokens": total_tokens,
+        "last_full_index_ts": _last_full_index_ts,
+        "uptime_seconds": uptime,
+        "git_describe": get_git_describe(),
+        "git_commit": get_git_commit(),
+    }
+
+
+@router.get("/api/health/detailed", response_model=HealthResponse)
+async def api_health_detailed(current_user=Depends(require_admin)):
+    """Detailed health check — admin only.
+
+    Returns enriched metrics including memory, disk, SSE connections, and backup stats.
+    """
+
+    import psutil
+
+    from backend.admin import _count_active_sessions, _get_disk_stats
+    from backend.indexer import _last_full_index_ts, index
+
+    total_files = sum(len(v["files"]) for v in index.values())
+    total_tokens = sum(len(v.get("files", [])) * 1000 for v in index.values())
+    import time
+    uptime = int(time.time() - _SERVER_START_TIME) if '_SERVER_START_TIME' in globals() else 0  # noqa: F821 — voir ci-dessus
+
+    # Memory
+    vm = psutil.virtual_memory()
+    mem_used_mb = round(vm.used / (1024 ** 2), 1)
+    mem_total_mb = round(vm.total / (1024 ** 2), 1)
+    mem_pct = round(vm.percent, 1)
+
+    # CPU
+    cpu_pct = psutil.cpu_percent(interval=None)
+
+    # Disk
+    disk_used_gb, disk_total_gb = _get_disk_stats()
+    disk_free_gb = round(disk_total_gb - disk_used_gb, 2)
+    disk_pct = round((disk_used_gb / disk_total_gb * 100) if disk_total_gb > 0 else 0, 1)
+
+    # SSE connections (approximation)
+    active_sessions = _count_active_sessions()
+
+    # Backups
+    from backend.admin import _scan_backups
+    backup_rows = _scan_backups()
+    total_backups = len(backup_rows)
+    total_backup_size_mb = round(sum(r["size"] for r in backup_rows) / (1024 ** 2), 2)
+    oldest_backup_age_days = 0.0
+    if backup_rows:
+        now_ts = int(time.time())
+        oldest_ts = min(r["timestamp"] for r in backup_rows)
+        oldest_backup_age_days = round((now_ts - oldest_ts) / 86400, 2)
+
+    # Index details
+    index_detail = {}
+    for name, data in index.items():
+        index_detail[name] = {
+            "file_count": len(data["files"]),
+            "tag_count": len(data.get("tags", [])),
+            "token_count_approx": len(data.get("files", [])) * 1000,
+        }
+
+    return {
+        "status": "ok",
+        "version": get_version(),
+        "vaults": len(index),
+        "total_files": total_files,
+        "total_tokens": total_tokens,
+        "last_full_index_ts": _last_full_index_ts,
+        "uptime_seconds": uptime,
+        "git_describe": get_git_describe(),
+        "git_commit": get_git_commit(),
+        # Enriched fields
+        "memory": {
+            "used_mb": mem_used_mb,
+            "total_mb": mem_total_mb,
+            "percent": mem_pct,
+        },
+        "cpu": {
+            "percent": cpu_pct,
+        },
+        "disk": {
+            "used_gb": disk_used_gb,
+            "total_gb": disk_total_gb,
+            "free_gb": disk_free_gb,
+            "percent": disk_pct,
+        },
+        "connections": {
+            "active_sse": active_sessions,
+        },
+        "backups": {
+            "total_count": total_backups,
+            "total_size_mb": total_backup_size_mb,
+            "oldest_age_days": oldest_backup_age_days,
+        },
+        "index": index_detail,
+    }

backend/routers/search.py

@@ -0,0 +1,353 @@
+"""Search, suggest, graph & index-reload endpoints (ROADMAP #85, tranche 5).
+
+Handlers déplacés depuis :mod:`backend.main` sans changement de
+comportement : mêmes chemins, mêmes modèles de réponse (déménagés dans
+:mod:`backend.schemas`), mêmes dépendances d'authentification. La logique
+métier vit déjà dans :mod:`backend.services.search`,
+:mod:`backend.search`, :mod:`backend.services.graph` et
+:mod:`backend.services.mutations`.
+
+Adaptations strictement équivalentes :
+- Le pool ``_search_executor`` de ``main`` vit désormais dans
+  :mod:`backend.search_executor` (même dimensionnement, même cycle de vie
+  géré par le lifespan de ``main``) : accès via
+  :func:`get_search_executor`.
+"""
+
+import asyncio
+import logging
+from functools import partial
+from pathlib import Path
+
+from fastapi import APIRouter, Body, Depends, HTTPException, Query
+
+from backend.audit import log_file_save
+from backend.auth.middleware import check_vault_access, require_admin, require_auth
+from backend.indexer import get_vault_data, reload_index, update_single_file
+from backend.schemas import (
+    AdvancedSearchResponse,
+    GraphResponse,
+    ReloadResponse,
+    ReplaceResponse,
+    SearchResponse,
+    SuggestResponse,
+    TagsResponse,
+    TagSuggestResponse,
+    TreeSearchResponse,
+    VaultPathsResponse,
+    VaultStatsResponse,
+)
+from backend.search import suggest_tags, suggest_titles
+from backend.search_executor import get_search_executor
+from backend.services.graph import get_graph as service_get_graph
+from backend.services.mutations import (
+    replace_in_files as service_replace_in_files,
+)
+from backend.services.search import advanced_search_vaults, list_paths, search_paths, search_vaults
+from backend.services.search import list_tags as service_list_tags
+from backend.sse import sse_manager
+
+logger = logging.getLogger("obsigate")
+
+router = APIRouter(tags=["search"])
+
+
+@router.get("/api/search", response_model=SearchResponse)
+async def api_search(
+    q: str = Query("", description="Search query"),
+    vault: str = Query("all", description="Vault filter"),
+    tag: str | None = Query(None, description="Tag filter"),
+    limit: int = Query(50, ge=1, le=200, description="Results per page"),
+    offset: int = Query(0, ge=0, description="Pagination offset"),
+    current_user=Depends(require_auth),
+):
+    """Full-text search across vaults with relevance scoring.
+
+    Supports combining free-text queries with tag filters.
+    Results are ranked by a multi-factor scoring algorithm.
+    Pagination via ``limit`` and ``offset`` (defaults preserve backward compat).
+
+    Args:
+        q: Free-text search string.
+        vault: Vault name or ``"all"`` to search everywhere.
+        tag: Comma-separated tag names to require.
+        limit: Max results per page (1–200).
+        offset: Pagination offset.
+
+    Returns:
+        ``SearchResponse`` with ranked results and snippets.
+    """
+    loop = asyncio.get_event_loop()
+    # Fetch the full result set (capped at DEFAULT_SEARCH_LIMIT internally) and
+    # paginate in the shared service so routes and tools share the same logic.
+    return await loop.run_in_executor(
+        get_search_executor(),
+        partial(search_vaults, q, vault, tag, limit, offset),
+    )
+
+
+@router.get("/api/tags", response_model=TagsResponse)
+async def api_tags(vault: str | None = Query(None, description="Vault filter"), current_user=Depends(require_auth)):
+    """Return all unique tags with occurrence counts.
+
+    Args:
+        vault: Optional vault name to restrict tag aggregation.
+
+    Returns:
+        ``TagsResponse`` with tags sorted by descending count.
+    """
+    return {"vault_filter": vault, "tags": service_list_tags(vault)}
+
+
+@router.get("/api/tree-search", response_model=TreeSearchResponse)
+async def api_tree_search(
+    q: str = Query("", description="Search query"),
+    vault: str = Query("all", description="Vault filter"),
+    current_user=Depends(require_auth),
+):
+    """Search for files and directories in the tree structure using pre-built index.
+
+    Uses the in-memory path index for instant filtering without filesystem access.
+
+    Args:
+        q: Search string to match against file/directory paths.
+        vault: Vault name or "all" to search everywhere.
+
+    Returns:
+        ``TreeSearchResponse`` with matching paths.
+    """
+    return search_paths(q, vault)
+
+
+@router.get("/api/vault/{vault_name}/paths", response_model=VaultPathsResponse)
+async def api_vault_paths(
+    vault_name: str,
+    limit: int = Query(5000, ge=1, le=20000, description="Maximum number of indexed paths to return"),
+    current_user=Depends(require_auth),
+):
+    """Return a flat list of every indexed file and directory in a vault.
+
+    Used by the AI assistant ``@`` mention menu to filter paths instantly on
+    the client (one request instead of one per keystroke).
+
+    Args:
+        vault_name: Name of the vault.
+        limit: Maximum number of entries returned.
+
+    Returns:
+        ``VaultPathsResponse`` with the vault's indexed paths.
+    """
+    if not check_vault_access(vault_name, current_user):
+        raise HTTPException(status_code=403, detail=f"Accès refusé à la vault '{vault_name}'")
+    return list_paths(vault_name, limit=limit)
+
+
+@router.get("/api/search/advanced", response_model=AdvancedSearchResponse)
+async def api_advanced_search(
+    q: str = Query("", description="Advanced search query (supports tag:, vault:, title:, path:, ext: operators)"),
+    vault: str = Query("all", description="Vault filter"),
+    tag: str | None = Query(None, description="Comma-separated tag filter"),
+    limit: int = Query(50, ge=1, le=200, description="Results per page"),
+    offset: int = Query(0, ge=0, description="Pagination offset"),
+    sort: str = Query("relevance", description="Sort by 'relevance' or 'modified'"),
+    case_sensitive: bool = Query(False, description="Match case"),
+    whole_word: bool = Query(False, description="Match whole words only"),
+    regex: bool = Query(False, description="Treat query as regex"),
+    include_paths: str | None = Query(None, description="Comma-separated glob patterns to include"),
+    exclude_paths: str | None = Query(None, description="Comma-separated glob patterns to exclude"),
+    created: str | None = Query(None, description="Created date filter (>date, <date, date..date)"),
+    modified: str | None = Query(None, description="Modified date filter (>date, <date, date..date, <Nd)"),
+    size: str | None = Query(None, description="Size filter (>size, <size, size..size, e.g. >1MB, <10KB)"),
+    semantic: bool = Query(False, description="Fuse TF-IDF with semantic embeddings (RRF)"),
+    current_user=Depends(require_auth),
+):
+    """Advanced full-text search with TF-IDF scoring, facets, and pagination.
+
+    Supports advanced query operators:
+    - ``tag:<name>`` or ``#<name>`` — filter by tag
+    - ``vault:<name>`` — filter by vault
+    - ``title:<text>`` — filter by title substring
+    - ``path:<text>`` — filter by path substring
+    - ``ext:<type>`` — filter by file extension
+    - ``created:>2024-01-01`` — filter by creation date
+    - ``modified:<7d`` or ``modified:2024-01-01..2024-06-01`` — filter by modification date
+    - ``size:>1MB`` or ``size:100KB..1MB`` — filter by file size
+    - Remaining text is scored using TF-IDF with accent normalization.
+    - Toggles: case_sensitive, whole_word, regex
+    - Path filters: include_paths, exclude_paths (glob patterns)
+    - ``semantic=true`` — fuse the TF-IDF ranking with the semantic (embedding)
+      ranking via Reciprocal Rank Fusion and expose ``semantic_score`` per result.
+
+    Results include ``<mark>``-highlighted snippets and faceted tag/vault counts.
+    """
+    loop = asyncio.get_event_loop()
+    search_fn = partial(advanced_search_vaults, q, vault=vault, tag=tag,
+                limit=limit, offset=offset, sort=sort,
+                case_sensitive=case_sensitive, whole_word=whole_word, regex=regex,
+                include_paths=include_paths, exclude_paths=exclude_paths,
+                created=created, modified=modified, size=size, semantic=semantic)
+    try:
+        return await loop.run_in_executor(get_search_executor(), search_fn)
+    except ValueError as e:
+        raise HTTPException(400, str(e)) from e
+
+
+@router.post("/api/search/replace", response_model=ReplaceResponse)
+async def api_search_replace(
+    body: dict = Body(...),
+    current_user=Depends(require_auth),
+):
+    """Find and replace across vault files."""
+    query = body.get("query", "")
+    replacement = body.get("replacement", "")
+    vault_filter = body.get("vault", "all")
+    case_sensitive = body.get("case_sensitive", False)
+    whole_word = body.get("whole_word", False)
+    regex_mode = body.get("regex", False)
+    include_paths = body.get("include_paths")
+    exclude_paths = body.get("exclude_paths")
+    replace_all = body.get("replace_all", False)
+    dry_run = body.get("dry_run", not replace_all)
+
+    if not query:
+        raise HTTPException(400, "Query is required")
+
+    result = service_replace_in_files(
+        query,
+        replacement,
+        vault=vault_filter,
+        case_sensitive=case_sensitive,
+        whole_word=whole_word,
+        regex=regex_mode,
+        include_paths=include_paths,
+        exclude_paths=exclude_paths,
+        replace_all=replace_all,
+        dry_run=dry_run,
+        is_vault_allowed=lambda v: check_vault_access(v, current_user),
+    )
+
+    if dry_run:
+        return result
+
+    # Side effects for applied replacements (audit + incremental index).
+    for match in result.get("replaced", []):
+        log_file_save(current_user["username"], match["vault"], match["path"], match.get("size", 0))
+        vault_data = get_vault_data(match["vault"])
+        if vault_data:
+            abs_path = str(Path(vault_data["path"]) / match["path"])
+            await update_single_file(match["vault"], abs_path)
+
+    return result
+
+
+@router.get("/api/suggest", response_model=SuggestResponse)
+async def api_suggest(
+    q: str = Query("", description="Prefix to search for in file titles"),
+    vault: str = Query("all", description="Vault filter"),
+    limit: int = Query(10, ge=1, le=50, description="Max suggestions"),
+    current_user=Depends(require_auth),
+):
+    """Suggest file titles matching a prefix (accent-insensitive).
+
+    Used for autocomplete in the search input.
+
+    Args:
+        q: User-typed prefix (minimum 2 characters).
+        vault: Vault name or ``"all"``.
+        limit: Max number of suggestions.
+
+    Returns:
+        ``SuggestResponse`` with matching file title suggestions.
+    """
+    suggestions = suggest_titles(q, vault_filter=vault, limit=limit)
+    return {"query": q, "suggestions": suggestions}
+
+
+@router.get("/api/tags/suggest", response_model=TagSuggestResponse)
+async def api_tags_suggest(
+    q: str = Query("", description="Prefix to search for in tags"),
+    vault: str = Query("all", description="Vault filter"),
+    limit: int = Query(10, ge=1, le=50, description="Max suggestions"),
+    current_user=Depends(require_auth),
+):
+    """Suggest tags matching a prefix (accent-insensitive).
+
+    Used for autocomplete when typing ``tag:`` or ``#`` in the search input.
+
+    Args:
+        q: User-typed prefix (with or without ``#``, minimum 2 characters).
+        vault: Vault name or ``"all"``.
+        limit: Max number of suggestions.
+
+    Returns:
+        ``TagSuggestResponse`` with matching tag suggestions and counts.
+    """
+    suggestions = suggest_tags(q, vault_filter=vault, limit=limit)
+    return {"query": q, "suggestions": suggestions}
+
+
+@router.get("/api/index/reload", response_model=ReloadResponse)
+async def api_reload(current_user=Depends(require_admin)):
+    """Force a full re-index of all configured vaults.
+
+    Returns:
+        ``ReloadResponse`` with per-vault file and tag counts.
+    """
+    stats = await reload_index()
+    await sse_manager.broadcast("index_reloaded", {
+        "vaults": list(stats.keys()),
+        "stats": stats,
+    })
+    return {"status": "ok", "vaults": stats}
+
+
+@router.get("/api/graph/{vault_name}", response_model=GraphResponse)
+async def api_graph(
+    vault_name: str,
+    path: str = Query("", description="Relative path to focus on"),
+    depth: int = Query(1, ge=0, le=3, description="How many levels deep to expand"),
+    scope: str = Query("directory", description="'directory' (default) or 'full' for entire vault"),
+    tag: str = Query("", description="Filter: only show files with this tag"),
+    current_user=Depends(require_auth),
+):
+    """Return graph data (nodes and edges) for a vault or directory.
+
+    Nodes represent files and directories. Edges represent parent-child
+    relationships and wikilinks between markdown files.
+
+    Args:
+        vault_name: Name of the vault.
+        path: Relative directory path to focus on (empty = root).
+        depth: Expansion depth (0 = only direct children, 1-3 = deeper).
+        scope: 'directory' for subtree, 'full' for entire vault.
+        tag: Optional tag filter (only files with this tag appear).
+
+    Returns:
+        ``GraphResponse`` with nodes and edges.
+    """
+    if not check_vault_access(vault_name, current_user):
+        raise HTTPException(status_code=403, detail=f"Accès refusé à la vault '{vault_name}'")
+
+    return service_get_graph(vault_name, path=path, depth=depth, scope=scope, tag=tag)
+
+
+@router.get("/api/index/reload/{vault_name}", response_model=VaultStatsResponse)
+async def api_reload_vault(vault_name: str, current_user=Depends(require_admin)):
+    """Force a re-index of a single vault.
+
+    Args:
+        vault_name: Name of the vault to reindex.
+
+    Returns:
+        Dict with vault statistics.
+    """
+    try:
+        from backend.indexer import reload_single_vault
+        stats = await reload_single_vault(vault_name)
+        await sse_manager.broadcast("vault_reloaded", {
+            "vault": vault_name,
+            "stats": stats,
+        })
+        return {"status": "ok", "vault": vault_name, "stats": stats}
+    except ValueError as e:
+        raise HTTPException(status_code=404, detail=str(e))

backend/routers/sharing.py

@@ -0,0 +1,300 @@
+"""Public share endpoints (ROADMAP #85, tranche 3).
+
+Handlers déplacés depuis :mod:`backend.main` sans changement de
+comportement : mêmes chemins (``/api/share/*``, ``/api/shares``,
+``/s/{token}*``), mêmes modèles de réponse, mêmes dépendances
+d'authentification (les pages ``/s/*`` restent publiques). La logique
+métier vit déjà dans :mod:`backend.share`.
+
+Adaptations strictement équivalentes (pas de changement de comportement) :
+- ``_resolve_safe_path`` / ``_backup_file`` de ``main`` n'étaient que des
+  wrappers directs : appelés ici via :mod:`backend.services.paths` et
+  :mod:`backend.services.backups` (mêmes signatures, mêmes exceptions
+  ``ServiceError`` toujours mappées par le handler global de ``main``).
+- ``_render_markdown`` reste défini dans ``main`` (extraction prévue dans
+  une tranche ultérieure) : import différé à l'intérieur des handlers, donc
+  sans import circulaire au chargement.
+"""
+
+import html as html_mod
+import json as _json
+import logging
+from pathlib import Path
+
+import frontmatter
+from fastapi import APIRouter, Body, Depends, HTTPException, Query
+from fastapi.responses import FileResponse, HTMLResponse, Response
+
+from backend.auth.middleware import check_vault_access, require_auth
+from backend.indexer import get_vault_data, parse_markdown_file, update_single_file
+from backend.schemas import ShareModel, StatusResponse
+from backend.secret_redactor import redact_file_content
+from backend.services.backups import create_backup
+from backend.services.paths import resolve_safe_path
+from backend.share import (
+    create_share,
+    get_share_by_token,
+    list_shares,
+    record_access,
+    revoke_share,
+)
+
+logger = logging.getLogger("obsigate")
+
+# Lazy import: WeasyPrint PDF export (requires GTK, may not be available everywhere)
+try:
+    from backend.pdf_export import build_pdf_html, generate_pdf
+except Exception:  # pragma: no cover - WeasyPrint/GTK missing
+    generate_pdf = None  # type: ignore[assignment]
+    build_pdf_html = None  # type: ignore[assignment]
+
+    logging.getLogger("obsigate").warning("PDF export unavailable (WeasyPrint/GTK not found)")
+
+router = APIRouter(tags=["sharing"])
+
+
+@router.post("/api/share/{vault_name}", response_model=ShareModel)
+async def api_share_create(
+    vault_name: str,
+    body: dict = Body(...),
+    current_user=Depends(require_auth),
+):
+    """Create a public share link for a document.
+
+    Also sets ``publish: true`` in the file's YAML frontmatter so the
+    frontend can visually indicate the file is publicly shared.
+    """
+    if not check_vault_access(vault_name, current_user):
+        raise HTTPException(403, f"Accès refusé à la vault '{vault_name}'")
+    path = body.get("path", "")
+    expires = body.get("expires_in_hours")
+    share = create_share(vault_name, path, current_user["username"], expires)
+    share["url"] = f"/s/{share['token']}"
+
+    # Set publish: true in the file's frontmatter
+    vault_data = get_vault_data(vault_name)
+    if vault_data:
+        file_path = resolve_safe_path(Path(vault_data["path"]), path)
+        if file_path.exists() and file_path.suffix == ".md":
+            try:
+                raw = file_path.read_text(encoding="utf-8", errors="replace")
+                post = frontmatter.loads(raw)
+                if not post.metadata.get("publish"):
+                    post.metadata["publish"] = True
+                    new_raw = frontmatter.dumps(post)
+                    create_backup(file_path, vault_name, path)
+                    file_path.write_text(new_raw, encoding="utf-8")
+                    await update_single_file(vault_name, str(file_path))
+                    logger.info(f"Set publish:true on {vault_name}/{path}")
+            except Exception as e:
+                logger.warning(f"Failed to set publish metadata on {vault_name}/{path}: {e}")
+
+    return share
+
+
+@router.get("/api/shares", response_model=list[ShareModel])
+async def api_shares_list(vault: str | None = Query(None), current_user=Depends(require_auth)):
+    """List all shares (optionally filtered by vault)."""
+    shares = list_shares(vault)
+    for s in shares:
+        s["url"] = f"/s/{s['token']}"
+    return shares
+
+
+@router.delete("/api/share/{share_id}", response_model=StatusResponse)
+async def api_share_revoke(share_id: str, current_user=Depends(require_auth)):
+    if not revoke_share(share_id):
+        raise HTTPException(404, "Share not found")
+    return {"status": "revoked"}
+
+
+@router.get(
+    "/s/{token}/pdf",
+    response_class=Response,
+    responses={200: {"content": {"application/pdf": {}}, "description": "Shared document as PDF"}},
+)
+async def public_share_pdf_download(token: str):
+    """Download shared document as real PDF via WeasyPrint."""
+    from backend.main import _render_markdown  # différé : évite l'import circulaire (#85)
+
+    if generate_pdf is None:
+        raise HTTPException(501, "PDF export unavailable (WeasyPrint/GTK not available)")
+    share = get_share_by_token(token)
+    if not share:
+        raise HTTPException(404, "Share not found or expired")
+    vault_data = get_vault_data(share["vault"])
+    if not vault_data:
+        raise HTTPException(404, "Vault not found")
+    vault_root = Path(vault_data["path"])
+    file_path = resolve_safe_path(vault_root, share["path"])
+    if not file_path.exists():
+        raise HTTPException(404, "File not found")
+    try:
+        raw = file_path.read_text(encoding="utf-8", errors="replace")
+    except Exception:
+        raise HTTPException(500, "Cannot read file")
+    record_access(token)
+    raw = redact_file_content(raw, str(file_path))
+    post = parse_markdown_file(raw)
+    ext = file_path.suffix.lower()
+    if ext == ".md":
+        html = _render_markdown(post.content, share["vault"], file_path)
+    else:
+        html = f'<pre style="font-family:monospace;font-size:12px;line-height:1.6;white-space:pre-wrap">{html_mod.escape(raw)}</pre>'
+    title = post.metadata.get("title", file_path.stem)
+    pdf_html = build_pdf_html(html, str(title))
+    pdf_bytes = generate_pdf(pdf_html, str(title))
+    safe_name = "".join(c for c in str(title) if c.isascii() and (c.isalnum() or c in " _-.")).strip() or "document"
+    return Response(content=pdf_bytes, media_type="application/pdf", headers={"Content-Disposition": f'attachment; filename="{safe_name}.pdf"'})
+
+
+@router.get("/s/{token}/raw", response_class=FileResponse)
+async def public_share_raw(token: str):
+    """Download the raw (original) shared document."""
+    share = get_share_by_token(token)
+    if not share:
+        raise HTTPException(404, "Share not found or expired")
+    vault_data = get_vault_data(share["vault"])
+    if not vault_data:
+        raise HTTPException(404, "Vault not found")
+    vault_root = Path(vault_data["path"])
+    file_path = resolve_safe_path(vault_root, share["path"])
+    if not file_path.exists():
+        raise HTTPException(404, "File not found")
+    record_access(token)
+    return FileResponse(path=str(file_path), filename=file_path.name, media_type="application/octet-stream")
+
+
+@router.get("/s/{token}", response_class=HTMLResponse)
+async def public_share_view(token: str):
+    """Public share view — no authentication required."""
+    from backend.main import _render_markdown  # différé : évite l'import circulaire (#85)
+
+    share = get_share_by_token(token)
+    if not share:
+        raise HTTPException(404, "Share not found or expired")
+    vault_data = get_vault_data(share["vault"])
+    if not vault_data:
+        raise HTTPException(404, "Vault not found")
+    vault_root = Path(vault_data["path"])
+    file_path = resolve_safe_path(vault_root, share["path"])
+    if not file_path.exists():
+        raise HTTPException(404, "File not found")
+    try:
+        raw = file_path.read_text(encoding="utf-8", errors="replace")
+    except Exception:
+        raise HTTPException(500, "Cannot read file")
+    record_access(token)
+    raw = redact_file_content(raw, str(file_path))
+    post = parse_markdown_file(raw)
+    ext = file_path.suffix.lower()
+
+    if ext == ".md":
+        html = _render_markdown(post.content, share["vault"], file_path)
+    else:
+        escaped = html_mod.escape(raw)
+        html = f'<pre style="background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:16px;overflow-x:auto;font-size:0.85rem;line-height:1.6"><code>{escaped}</code></pre>'
+
+    title = post.metadata.get("title", file_path.stem)
+
+    # Escape everything user-controlled before embedding in HTML/JS (BUG-022).
+    title_esc = html_mod.escape(str(title))
+    # Neutralise ``</script>`` in the JS string literal too.
+    title_download_js = (
+        _json.dumps(f"{title}.md")
+        .replace("<", "\\u003c")
+        .replace(">", "\\u003e")
+        .replace("&", "\\u0026")
+    )
+
+    # JSON-escape raw content for embedding in HTML, and neutralise ``</script>``.
+    raw_json = (
+        _json.dumps(raw)
+        .replace("<", "\\u003c")
+        .replace(">", "\\u003e")
+        .replace("&", "\\u0026")
+    )
+    fm_html = ""
+    if post.metadata:
+        fm_items = []
+        skip_keys = {"title", "titre"}
+        for k, v in post.metadata.items():
+            if k in skip_keys:
+                continue
+            if isinstance(v, list):
+                v = ", ".join(str(x) for x in v)
+            elif isinstance(v, bool):
+                v = "✓" if v else "✗"
+            elif v is None:
+                v = "—"
+            fm_items.append(
+                f'<div class="fm-row"><span class="fm-key">{html_mod.escape(str(k))}</span>'
+                f'<span class="fm-val">{html_mod.escape(str(v))}</span></div>'
+            )
+        if fm_items:
+            fm_html = f'<div class="fm-section"><div class="fm-header">Frontmatter</div><div class="fm-body">{"".join(fm_items)}</div></div>'
+
+    return HTMLResponse(f"""<!DOCTYPE html><html lang="fr" data-theme="dark"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1">
+<title>{title_esc} — ObsiGate Share</title>
+<style>
+:root {{ --bg:#1a1a2e; --bg-card:#16213e; --text:#e0e0e0; --text-muted:#888; --accent:#6366f1; --border:#2a2a4a; --banner-bg:var(--accent); --banner-text:#fff; }}
+[data-theme="light"] {{ --bg:#f8f9fa; --bg-card:#fff; --text:#1a1a2e; --text-muted:#666; --accent:#4f46e5; --border:#ddd; --banner-bg:#eef2ff; --banner-text:#4338ca; }}
+*{{box-sizing:border-box;margin:0;padding:0}}
+body{{font-family:system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;min-height:100vh}}
+.toolbar{{position:sticky;top:0;z-index:10;background:var(--bg-card);border-bottom:1px solid var(--border);padding:8px 16px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}}
+.toolbar-title{{font-weight:600;font-size:0.9rem;margin-right:auto;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}}
+.toolbar-btn{{padding:6px 12px;border:1px solid var(--border);border-radius:6px;background:var(--bg);color:var(--text);cursor:pointer;font-size:0.8rem;display:flex;align-items:center;gap:5px;transition:all .15s}}
+.toolbar-btn:hover{{background:var(--accent);color:#fff;border-color:var(--accent)}}
+.toolbar-btn svg{{width:15px;height:15px;flex-shrink:0}}
+.toolbar-btn:hover svg{{stroke:#fff}}
+.share-banner{{background:var(--banner-bg);color:var(--banner-text);padding:6px 16px;font-size:0.8rem;text-align:center;display:flex;align-items:center;justify-content:center;gap:6px}}
+.share-banner svg{{width:14px;height:14px;flex-shrink:0}}
+.content{{max-width:820px;margin:0 auto;padding:24px 20px 60px}}
+.content h1{{font-size:1.8rem;margin-bottom:16px;border-bottom:2px solid var(--border);padding-bottom:8px}}
+.content h2{{font-size:1.4rem;margin:24px 0 12px}}
+.content h3{{font-size:1.15rem;margin:20px 0 8px}}
+.content p{{margin:8px 0}}
+.content pre{{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:12px 16px;overflow-x:auto;font-size:0.85rem}}
+.content code{{font-size:0.9em;background:var(--bg-card);padding:1px 4px;border-radius:3px}}
+.content pre code{{background:none;padding:0}}
+.content a{{color:var(--accent)}}.content img{{max-width:100%;border-radius:6px}}
+.fm-section{{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:12px 16px;margin-bottom:20px}}
+.fm-header{{font-weight:600;font-size:0.8rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.5px;margin-bottom:8px}}
+.fm-body{{display:grid;grid-template-columns:1fr 2fr;gap:4px 12px;font-size:0.85rem}}
+.fm-row{{display:contents}}
+.fm-key{{color:var(--accent);font-weight:500}}
+.fm-val{{color:var(--text);word-break:break-word}}
+.content blockquote{{border-left:3px solid var(--accent);padding-left:16px;color:var(--text-muted);margin:12px 0}}
+.content table{{border-collapse:collapse;width:100%;margin:12px 0}}
+.content th,.content td{{border:1px solid var(--border);padding:8px 12px;text-align:left}}
+.content th{{background:var(--bg-card)}}
+@media print{{.toolbar,.share-banner{{display:none}}body{{background:#fff;color:#000}}}}
+@media(max-width:600px){{.content{{padding:16px 12px 40px}}.toolbar{{gap:4px}}.toolbar-btn{{padding:4px 8px;font-size:0.7rem}}}}
+</style></head>
+<body>
+<div class="share-banner">
+  <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M14.5 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V7.5L14.5 2z"/><polyline points="14 2 14 8 20 8"/></svg>
+  Document partagé via ObsiGate
+</div>
+<div class="toolbar">
+  <span class="toolbar-title">{title_esc}</span>
+  <button class="toolbar-btn" onclick="toggleTheme()" title="Thème clair/sombre">
+    <svg id="theme-icon-dark" xmlns="http://www.w3.org/2000/svg" width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/></svg>
+    <svg id="theme-icon-light" xmlns="http://www.w3.org/2000/svg" width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" style="display:none"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg>
+  </button>
+  <button class="toolbar-btn" onclick="exportMD()" title="Télécharger en Markdown">
+    <svg xmlns="http://www.w3.org/2000/svg" width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/></svg>
+    .md
+  </button>
+  <button class="toolbar-btn" onclick="location.href=location.pathname+'/pdf'" title="Télécharger en PDF">
+    <svg xmlns="http://www.w3.org/2000/svg" width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2-2V8z"/><polyline points="14 2 14 8 20 8"/><line x1="16" y1="13" x2="8" y2="13"/><line x1="16" y1="17" x2="8" y2="17"/><polyline points="10 9 9 9 8 9"/></svg>
+    PDF
+  </button>
+</div>
+<div class="content" id="content">{fm_html}{html}</div>
+<script id="raw-content" type="text/plain" style="display:none">{raw_json}</script>
+<script>
+function toggleTheme(){{var t=document.documentElement;var isDark=t.dataset.theme==="dark";t.dataset.theme=isDark?"light":"dark";document.getElementById("theme-icon-dark").style.display=isDark?"none":"";document.getElementById("theme-icon-light").style.display=isDark?"":"none";localStorage.setItem("obsigate-share-theme",t.dataset.theme)}}
+(function(){{var s=localStorage.getItem("obsigate-share-theme");if(!s)s="dark";document.documentElement.dataset.theme=s;var isDark=s==="dark";document.getElementById("theme-icon-dark").style.display=isDark?"":"none";document.getElementById("theme-icon-light").style.display=isDark?"none":""}})();
+function exportMD(){{var raw=JSON.parse(document.getElementById("raw-content").textContent);var b=new Blob([raw],{{type:"text/markdown"}});var a=document.createElement("a");a.href=URL.createObjectURL(b);a.download={title_download_js};a.click()}}
+</script></body></html>""")

backend/routers/webhooks.py

@@ -0,0 +1,54 @@
+"""Webhook CRUD endpoints (ROADMAP #85, tranche 2).
+
+Handlers déplacés depuis :mod:`backend.main` sans changement de
+comportement : mêmes chemins (``/api/webhooks``), même modèle de réponse
+(:class:`backend.schemas.WebhookModel`), même dépendance admin. La logique
+métier vit déjà dans :mod:`backend.webhooks` (validation d'URL anti-SSRF,
+store ``webhook_secrets.json`` — BUG-026).
+"""
+
+from fastapi import APIRouter, Body, Depends, HTTPException
+
+from backend.auth.middleware import require_admin
+from backend.schemas import StatusResponse, WebhookModel
+from backend.webhooks import (
+    create_webhook,
+    delete_webhook,
+    get_webhooks,
+    update_webhook,
+)
+
+router = APIRouter(prefix="/api/webhooks", tags=["webhooks"])
+
+
+@router.get("", response_model=list[WebhookModel])
+async def api_webhooks_list(current_user=Depends(require_admin)):
+    return get_webhooks()
+
+
+@router.post("", response_model=WebhookModel)
+async def api_webhooks_create(body: dict = Body(...), current_user=Depends(require_admin)):
+    name = body.get("name", "Unnamed")
+    url = body.get("url", "")
+    events = body.get("events", [])
+    secret = body.get("secret")
+    if not url:
+        raise HTTPException(400, "URL is required")
+    return create_webhook(name, url, events, secret)
+
+
+@router.patch("/{webhook_id}", response_model=WebhookModel)
+async def api_webhooks_update(
+    webhook_id: str, body: dict = Body(...), current_user=Depends(require_admin)
+):
+    result = update_webhook(webhook_id, body)
+    if not result:
+        raise HTTPException(404, "Webhook not found")
+    return result
+
+
+@router.delete("/{webhook_id}", response_model=StatusResponse)
+async def api_webhooks_delete(webhook_id: str, current_user=Depends(require_admin)):
+    if not delete_webhook(webhook_id):
+        raise HTTPException(404, "Webhook not found")
+    return {"status": "deleted"}

backend/schemas.py

@@ -188,6 +188,204 @@ class BackupsAutoResponse(BaseModel):
     since_hours: int | float = Field(description="Look-back window in hours")
 
 
+class DiffResponse(BaseModel):
+    """Response containing a unified diff between two file versions (#85 — extrait de backend.main, inchangé)."""
+
+    vault: str = Field(description="Vault name")
+    path: str = Field(description="Relative file path")
+    version: int = Field(description="Backup version timestamp (left/old side)")
+    compare_with: int | None = Field(default=None, description="Other backup version or null for current file (right/new side)")
+    diff: str = Field(description="Unified diff (empty if no changes)")
+
+
+class RestoreRequest(BaseModel):
+    """Request to restore a file from a backup (#85 — extrait de backend.main, inchangé)."""
+
+    version: int = Field(description="Timestamp of the backup version to restore")
+
+
+class RestoreResponse(BaseModel):
+    """Response after restoring a file from backup (#85 — extrait de backend.main, inchangé)."""
+
+    success: bool = Field(description="Whether restore succeeded")
+    vault: str = Field(description="Vault name")
+    path: str = Field(description="Relative file path")
+    restored_from: int = Field(description="Timestamp of the backup used")
+    current_backed_up: int | None = Field(default=None, description="Timestamp of the backup created from the current version before restore, if any")
+
+
+# ---------------------------------------------------------------------------
+# Search / suggest / graph (#85 — extrait de backend.main, inchangé)
+# ---------------------------------------------------------------------------
+
+
+class SearchResultItem(BaseModel):
+    """A single search result."""
+
+    vault: str = Field(description="Vault name")
+    path: str = Field(description="Relative file path")
+    title: str = Field(description="File title")
+    tags: list[str] = Field(description="File tags")
+    score: int = Field(description="Relevance score")
+    snippet: str = Field(description="Content excerpt with highlights")
+    modified: str = Field(description="ISO 8601 modification timestamp")
+
+
+class SearchResponse(BaseModel):
+    """Full-text search response with optional pagination."""
+
+    query: str = Field(description="Original search query")
+    vault_filter: str = Field(description="Vault filter applied ('all' or vault name)")
+    tag_filter: str | None = Field(default=None, description="Tag filter applied")
+    count: int = Field(description="Number of results in this response")
+    total: int = Field(default=0, description="Total results before pagination")
+    offset: int = Field(default=0, description="Current pagination offset")
+    limit: int = Field(default=200, description="Page size")
+    results: list[SearchResultItem] = Field(description="Search result items")
+
+
+class TagsResponse(BaseModel):
+    """Tag aggregation response."""
+
+    vault_filter: str | None = Field(default=None, description="Vault filter applied")
+    tags: dict[str, int] = Field(description="Tag name → count mapping")
+
+
+class TreeSearchResult(BaseModel):
+    """A single tree search result item."""
+
+    vault: str = Field(description="Vault name")
+    path: str = Field(description="Full relative path")
+    name: str = Field(description="File or directory name")
+    type: str = Field(description="'file' or 'directory'")
+    matched_path: str = Field(description="Path segment that matched the query")
+
+
+class TreeSearchResponse(BaseModel):
+    """Tree search response with matching paths."""
+
+    query: str = Field(description="Search query")
+    vault_filter: str = Field(description="Vault filter applied")
+    results: list[TreeSearchResult] = Field(description="Matching files and directories")
+
+
+class VaultPathEntry(BaseModel):
+    """A single indexed path (file or directory) in a vault."""
+
+    vault: str = Field(description="Vault name")
+    path: str = Field(description="Full relative path")
+    name: str = Field(description="File or directory name")
+    type: str = Field(description="'file' or 'directory'")
+
+
+class VaultPathsResponse(BaseModel):
+    """Flat list of every indexed path in a vault (capped)."""
+
+    vault: str = Field(description="Vault name")
+    count: int = Field(description="Number of returned entries")
+    results: list[VaultPathEntry] = Field(description="Indexed files and directories")
+
+
+class AdvancedSearchResultItem(BaseModel):
+    """A single advanced search result with highlighted snippet."""
+
+    vault: str = Field(description="Vault name")
+    path: str = Field(description="Relative file path")
+    title: str = Field(description="File title")
+    tags: list[str] = Field(description="File tags")
+    score: float = Field(description="TF-IDF relevance score (or fused RRF score in semantic mode)")
+    semantic_score: float = Field(default=0.0, description="Cosine similarity from the semantic index (0 when unavailable)")
+    snippet: str = Field(description="Content excerpt with <mark> highlights")
+    modified: str = Field(description="ISO 8601 modification timestamp")
+    extension: str = Field(default="", description="File extension")
+
+
+class SearchFacets(BaseModel):
+    """Faceted counts for search results."""
+
+    tags: dict[str, int] = Field(default_factory=dict)
+    vaults: dict[str, int] = Field(default_factory=dict)
+
+
+class AdvancedSearchResponse(BaseModel):
+    """Advanced search response with TF-IDF scoring, facets, and pagination."""
+
+    results: list[AdvancedSearchResultItem] = Field(description="Search results")
+    total: int = Field(description="Total number of matching results")
+    offset: int = Field(description="Current pagination offset")
+    limit: int = Field(description="Page size")
+    facets: SearchFacets = Field(description="Faceted counts by tag and vault")
+    query_time_ms: float = Field(default=0, description="Server-side query time in milliseconds")
+    semantic_available: bool = Field(default=False, description="True when the semantic (embedding) index is ready")
+
+
+class TitleSuggestion(BaseModel):
+    """A file title suggestion for autocomplete."""
+
+    vault: str = Field(description="Vault name")
+    path: str = Field(description="Relative file path")
+    title: str = Field(description="File title")
+
+
+class SuggestResponse(BaseModel):
+    """Autocomplete suggestions for file titles."""
+
+    query: str = Field(description="Original query string")
+    suggestions: list[TitleSuggestion] = Field(description="Matching file suggestions")
+
+
+class TagSuggestion(BaseModel):
+    """A tag suggestion for autocomplete."""
+
+    tag: str = Field(description="Tag name")
+    count: int = Field(description="Number of files with this tag")
+
+
+class TagSuggestResponse(BaseModel):
+    """Autocomplete suggestions for tags."""
+
+    query: str = Field(description="Original query string")
+    suggestions: list[TagSuggestion] = Field(description="Matching tag suggestions")
+
+
+class GraphNode(BaseModel):
+    """A single node in the graph view."""
+
+    id: str = Field(description="Unique node identifier")
+    name: str = Field(description="Display name")
+    type: str = Field(description="'vault', 'directory', or 'file'")
+    path: str = Field(description="Relative path within vault")
+    size: int = Field(default=0, description="File size in bytes")
+    tags: list[str] = Field(default_factory=list, description="Tags from frontmatter")
+    incoming_count: int = Field(default=0, description="Number of incoming wikilinks")
+    outgoing_count: int = Field(default=0, description="Number of outgoing wikilinks")
+
+
+class GraphEdge(BaseModel):
+    """An edge between two nodes in the graph view."""
+
+    source: str = Field(description="Source node ID")
+    target: str = Field(description="Target node ID")
+    relation: str = Field(description="'parent', 'wikilink', or 'backlink'")
+
+
+class GraphResponse(BaseModel):
+    """Graph data for a vault or directory."""
+
+    vault: str = Field(description="Vault name")
+    path: str = Field(description="Root path for the graph")
+    scope: str = Field(default="directory", description="'directory' or 'full'")
+    nodes: list[GraphNode] = Field(description="Graph nodes (files and directories)")
+    edges: list[GraphEdge] = Field(description="Graph edges (parent and wikilink relations)")
+
+
+class ReloadResponse(BaseModel):
+    """Index reload confirmation with per-vault stats."""
+
+    status: str = Field(description="Reload status ('ok' or 'error')")
+    vaults: dict[str, Any] = Field(description="Per-vault file counts after reload")
+
+
 # ---------------------------------------------------------------------------
 # PDF
 # ---------------------------------------------------------------------------
@@ -408,6 +606,31 @@ class DashboardResponse(BaseModel):
     total_images: int = 0
 
 
+# ---------------------------------------------------------------------------
+# System / health (#85 — extrait de backend.main, comportement inchangé)
+# ---------------------------------------------------------------------------
+
+
+class HealthResponse(BaseModel):
+    """Application health status.
+
+    Déplacé depuis :mod:`backend.main` sans modification : pas de
+    ``extra="allow"`` ici, pour préserver la validation actuelle des
+    réponses (les champs enrichis de ``/api/health/detailed`` restent
+    filtrés comme avant).
+    """
+
+    status: str = Field(description="Health status ('ok' or 'error')")
+    version: str = Field(description="Application version (x.y.z — latest release tag)")
+    vaults: int = Field(description="Number of configured vaults")
+    total_files: int = Field(description="Total indexed files across all vaults")
+    total_tokens: int = Field(description="Total indexed tokens (approx.) across all vaults", default=0)
+    last_full_index_ts: str = Field(description="ISO timestamp of last full index rebuild", default="")
+    uptime_seconds: int = Field(description="Server uptime in seconds", default=0)
+    git_describe: str = Field(default="", description="Full git describe string (commits beyond tag), empty if no git")
+    git_commit: str = Field(default="", description="Short HEAD commit hash, empty if no git")
+
+
 # ---------------------------------------------------------------------------
 # Webhooks, sharing & conflicts
 # ---------------------------------------------------------------------------

backend/search_executor.py

@@ -0,0 +1,35 @@
+"""Shared thread pool for CPU-bound search (ROADMAP #85, tranche 5).
+
+Holder extrait de :mod:`backend.main` sans changement de comportement :
+un seul pool (2 workers, préfixe ``"search"``) créé au démarrage et arrêté
+à l'extinction par le lifespan de ``main``. Les routers et les endpoints
+restants y accèdent via :func:`get_search_executor` au lieu du global de
+``main`` (plus d'import circulaire potentiel).
+"""
+
+from __future__ import annotations
+
+from concurrent.futures import ThreadPoolExecutor
+
+_executor: ThreadPoolExecutor | None = None
+
+
+def init_search_executor(max_workers: int = 2) -> ThreadPoolExecutor:
+    """Create (or reuse) the shared search thread pool."""
+    global _executor
+    if _executor is None:
+        _executor = ThreadPoolExecutor(max_workers=max_workers, thread_name_prefix="search")
+    return _executor
+
+
+def shutdown_search_executor() -> None:
+    """Stop the shared search thread pool (best-effort, non-blocking)."""
+    global _executor
+    if _executor is not None:
+        _executor.shutdown(wait=False)
+        _executor = None
+
+
+def get_search_executor() -> ThreadPoolExecutor | None:
+    """Return the shared search thread pool (``None`` before startup)."""
+    return _executor

backend/services/mutations.py

@@ -14,6 +14,7 @@ from __future__ import annotations
 
 import logging
 import os
+import re
 import shutil
 from collections.abc import Callable
 from pathlib import Path
@@ -223,6 +224,102 @@ def edit_file(
     return {"success": True, "vault": vault_name, "path": rel_path, "size": len(content)}
 
 
+# Cell reference like "A1" / "AB42" (Excel A1 notation, up to 3 letters / 8 digits).
+_XLSX_CELL_RE = re.compile(r"^[A-Z]{1,3}[1-9][0-9]{0,7}$")
+# ponytail: bare int/float coercion mirrors what Excel does when you type a
+# number; dates/booleans stay text (upgrade path: parse locale dates too).
+_XLSX_INT_RE = re.compile(r"^[+-]?\d+$")
+_XLSX_FLOAT_RE = re.compile(r"^[+-]?(?:\d+\.\d*|\.\d+)$")
+
+
+def _coerce_xlsx_value(value: Any) -> Any:
+    """Turn the string sent by the cell editor back into a scalar."""
+    if not isinstance(value, str):
+        return value
+    text = value.strip()
+    if text == "":
+        return None
+    if _XLSX_INT_RE.match(text):
+        return int(text)
+    if _XLSX_FLOAT_RE.match(text):
+        return float(text)
+    return value
+
+
+def edit_xlsx_cells(
+    vault_name: str,
+    path: str,
+    sheet: str,
+    cells: dict[str, Any],
+    *,
+    backup: bool = True,
+) -> dict[str, Any]:
+    """Apply a batch of cell edits to an ``.xlsx`` workbook.
+
+    Raises:
+        ServiceError: ``not_found`` (404), ``read_only`` (403) or
+        ``invalid`` (400) for a bad sheet, cell reference or value.
+
+    ponytail: openpyxl round-trips values/formulas/styles but drops charts,
+    images and pivot tables; use the SheetJS path if a workbook needs those.
+    """
+    root = get_vault_root(vault_name)
+    _ensure_writable(root)
+    file_path = resolve_safe_path(root, path)
+
+    if not file_path.exists() or not file_path.is_file():
+        raise ServiceError(
+            f"File not found: {path}",
+            code="not_found",
+            status=404,
+            details={"vault": vault_name, "path": path},
+        )
+    if file_path.suffix.lower() != ".xlsx":
+        raise ServiceError(
+            f"Not an .xlsx file: {path}", code="invalid", status=400
+        )
+    if not cells:
+        raise ServiceError("No cells to update", code="invalid", status=400)
+    for ref in cells:
+        if not isinstance(ref, str) or not _XLSX_CELL_RE.match(ref):
+            raise ServiceError(
+                f"Invalid cell reference: {ref!r}", code="invalid", status=400
+            )
+
+    from openpyxl import load_workbook
+
+    try:
+        wb = load_workbook(file_path)
+    except Exception as exc:
+        raise ServiceError(
+            f"Cannot open workbook: {exc}", code="invalid", status=400
+        ) from exc
+    if sheet not in wb.sheetnames:
+        raise ServiceError(
+            f"Unknown sheet: {sheet}",
+            code="invalid",
+            status=400,
+            details={"sheets": wb.sheetnames},
+        )
+
+    rel_path = _rel(root, file_path)
+    if backup:
+        create_backup(file_path, vault_name, rel_path)
+
+    ws = wb[sheet]
+    for ref, value in cells.items():
+        ws[ref].value = _coerce_xlsx_value(value)
+    wb.save(file_path)
+
+    logger.info(f"XLSX cells saved: {vault_name}/{rel_path} [{sheet}] +{len(cells)}")
+    return {
+        "success": True,
+        "vault": vault_name,
+        "path": rel_path,
+        "size": len(cells),
+    }
+
+
 def append_to_file(
     vault_name: str,
     path: str,

backend/sse.py

@@ -0,0 +1,54 @@
+"""Server-Sent Events manager (ROADMAP #85, tranche 4).
+
+Singleton extrait de :mod:`backend.main` sans changement de comportement :
+les routers montés par ``main`` partagent la même instance (les clients SSE
+connectés sur ``/api/events`` reçoivent les broadcasts émis depuis
+n'importe quel router).
+"""
+
+from __future__ import annotations
+
+import asyncio
+import json as _json
+import logging
+
+logger = logging.getLogger("obsigate")
+
+
+class SSEManager:
+    """Manages SSE client connections and broadcasts events."""
+
+    def __init__(self):
+        self._clients: list[asyncio.Queue] = []
+
+    async def connect(self) -> asyncio.Queue:
+        """Register a new SSE client and return its message queue."""
+        queue: asyncio.Queue = asyncio.Queue()
+        self._clients.append(queue)
+        logger.debug(f"SSE client connected (total: {len(self._clients)})")
+        return queue
+
+    def disconnect(self, queue: asyncio.Queue):
+        """Remove a disconnected SSE client."""
+        if queue in self._clients:
+            self._clients.remove(queue)
+        logger.debug(f"SSE client disconnected (total: {len(self._clients)})")
+
+    async def broadcast(self, event_type: str, data: dict):
+        """Send an event to all connected SSE clients."""
+        message = _json.dumps(data, ensure_ascii=False)
+        dead: list[asyncio.Queue] = []
+        for q in self._clients:
+            try:
+                q.put_nowait({"event": event_type, "data": message})
+            except asyncio.QueueFull:
+                dead.append(q)
+        for q in dead:
+            self.disconnect(q)
+
+    @property
+    def client_count(self) -> int:
+        return len(self._clients)
+
+
+sse_manager = SSEManager()

backend/xlsx_reader.py

@@ -0,0 +1,86 @@
+"""Render ``.xlsx`` workbooks as HTML tables for the viewer (#xlsx).
+
+Read-only: formulas are shown as their text (``data_only=False``) so a
+round-trip through the viewer never depends on Excel's cached values.
+Write-side lives in ``backend.services.mutations.edit_xlsx_cells``.
+"""
+
+from __future__ import annotations
+
+import html
+from datetime import date, datetime
+from pathlib import Path
+from typing import Any
+
+from openpyxl import load_workbook
+from openpyxl.utils import get_column_letter
+
+# ponytail: hard caps bound the rendered grid (500 rows x 40 cols per sheet).
+# Raise them, or paginate per sheet, if a real workbook needs more.
+MAX_ROWS = 500
+MAX_COLS = 40
+
+
+def _fmt(value: Any) -> str:
+    if value is None:
+        return ""
+    if isinstance(value, datetime):
+        return value.strftime("%Y-%m-%d %H:%M")
+    if isinstance(value, date):
+        return value.isoformat()
+    return str(value)
+
+
+def _trim(grid: list[list[str]]) -> list[list[str]]:
+    """Drop trailing empty rows and columns (openpyxl pads to max_col)."""
+    while grid and not any(grid[-1]):
+        grid.pop()
+    if not grid:
+        return grid
+    width = 0
+    for row in grid:
+        for i in range(len(row) - 1, -1, -1):
+            if row[i]:
+                width = max(width, i + 1)
+                break
+    return [row[:width] for row in grid]
+
+
+def _table(grid: list[list[str]]) -> str:
+    if not grid:
+        return "<p><em>Feuille vide</em></p>"
+    n_cols = max(len(row) for row in grid)
+    out = [
+        (
+            '<div class="csv-table-wrapper"><table class="csv-table xlsx-table">'
+            '<thead><tr><th class="xlsx-corner"></th>'
+        )
+    ]
+    out += [f"<th>{get_column_letter(c)}</th>" for c in range(1, n_cols + 1)]
+    out.append("</tr></thead><tbody>")
+    for r, row in enumerate(grid, start=1):
+        out.append(f'<tr><th class="xlsx-rownum">{r}</th>')
+        for c, val in enumerate(row, start=1):
+            ref = f"{get_column_letter(c)}{r}"
+            out.append(f'<td data-cell="{ref}">{html.escape(val)}</td>')
+        out.append("</tr>")
+    out.append("</tbody></table></div>")
+    return "".join(out)
+
+
+def render_sheets(file_path: Path) -> list[dict[str, str]]:
+    """Return ``[{"name": sheet_title, "html": table_html}, ...]``."""
+    wb = load_workbook(str(file_path), read_only=True, data_only=False)
+    try:
+        sheets = []
+        for ws in wb.worksheets:
+            grid = [
+                [_fmt(v) for v in row]
+                for row in ws.iter_rows(
+                    min_row=1, max_row=MAX_ROWS, max_col=MAX_COLS, values_only=True
+                )
+            ]
+            sheets.append({"name": ws.title, "html": _table(_trim(grid))})
+        return sheets
+    finally:
+        wb.close()

desktop/Cargo.lock

@@ -2626,7 +2626,7 @@ dependencies = [
 
 [[package]]
 name = "obsigate-desktop"
-version = "2.25.0"
+version = "2.27.6"
 dependencies = [
  "chrono",
  "env_logger",

desktop/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "obsigate-desktop"
-version = "2.25.0"
+version = "2.27.6"
 description = "ObsiGate Desktop — Porte d'entrée native pour vos vaults Obsidian"
 authors = ["Bruno Charest"]
 edition = "2021"

desktop/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://raw.githubusercontent.com/nicedoc/obsigate/main/desktop/tauri.conf.schema.json",
   "productName": "ObsiGate",
-  "version": "2.25.0",
+  "version": "2.27.6",
   "identifier": "com.obsigate.desktop",
   "build": {
     "frontendDist": "../frontend",

docs/ISSUES_TODOLIST.md

@@ -188,6 +188,7 @@ Avant de corriger quoi que ce soit, un agent IA doit :
 | *BUG-076* | [🟡 IMPORTANT] Assistant IA : après une action de l'agent, l'arborescence et le document ouvert ne sont pas rafraîchis dynamiquement | 🟢 corrigé | P1 | 📱 frontend | IA | `frontend/js/bookslm.js` | Mode agent : créer/supprimer un fichier ou dossier, modifier le document ouvert → l'UI ne bouge pas | `frontend/js/bookslm.js` : `MUTATING_TOOLS`/`FILE_WRITE_TOOLS`, refresh d'arborescence débouncé sur event `tool`, `_notifyFileWritten` étendu (xlsx/docx/csv/pdf). Tests : `tests/frontend/ai.test.mjs`, `tests/frontend/editor-inline.test.mjs` | Aucun refresh explicite sur les événements `tool` mutateurs (repose uniquement sur le watcher SSE) ; `_notifyFileWritten` ignore les créations de documents (xlsx/docx/csv/pdf) |
 | *BUG-077* | [🟡 IMPORTANT] Assistant IA : aucun bouton « Stop » pour arrêter l'exécution de l'agent à tout moment | 🟢 corrigé | P1 | 📱 frontend | IA | `frontend/js/bookslm.js` | Mode agent : lancer une longue tâche → le bouton Envoyer est désactivé, impossible d'arrêter (seule la fermeture du panneau abort) | `frontend/js/bookslm.js` + `frontend/style.css` : bouton d'envoi → Stop (`_syncSendButton`/`_stopGeneration`/`_markStopped`), i18n `ai.stop`/`ai.stopped`. Tests : `tests/frontend/ai.test.mjs` (+2) | `_abortCtrl` n'est déclenché que par `close()` ; aucun signal d'arrêt côté client pendant le stream |
 | *BUG-078* | [🟡 IMPORTANT] Fichiers de code : la coloration syntaxique (highlight.js) disparaît — les feuilles de thème sont basculées à partir de la **clé** de thème au lieu du **mode** | 🟢 corrigé | P1 | 📱 frontend | IA | `frontend/js/themes.js`, `frontend/js/ui.js`, `tests/frontend/unit.test.mjs` | Ouvrir un fichier `.py`/`.sh`/`.ps1`/`.yml` : le code s'affiche en texte brut, sans couleurs | `frontend/js/themes.js` : `applyTheme` bascule `hljs-theme-dark`/`hljs-theme-light` selon le **mode** (`isDark`). `frontend/js/ui.js` : `initTheme`/`applyTheme` résolvent le mode persisté (`obsigate-theme-mode`) au lieu de traiter la clé (`defaut-obsigate`) comme un mode. Test : `unit.test.mjs` (+1). | Les deux feuilles étaient désactivées car `defaut-obsigate !== "dark"` et `!== "light"` ; résultat **non déterministe** selon l'ordre `UI.initTheme()` (clé) / `Sync.init()` → `themes.initThemes()` (mode). Vérifié Playwright : 5/5 chargements colorés (`.py`), sépia/contraste élevé sur la palette claire |
+| *BUG-079* | `GET /api/diagnostics` → 500 « dictionary changed size during iteration » (stats d'index) | 🟢 corrigé | P1 | ⚙️ backend | IA | `backend/main.py` | Charger la page de diagnostic pendant une indexation : `GET /api/diagnostics` → 500 | `backend/main.py` (`api_diagnostics`) : snapshot avant itération — `list(index.items())` et `inv.word_index.copy()` (copie C atomique sous le GIL) ; test de non-régression `tests/test_api_main.py::TestConfig::test_diagnostics_concurrent_index_writes` | Le handler itérait les dicts en direct alors que l'indexeur les modifiait depuis un autre thread (rebuild initial dans `_search_executor`, hooks incrémentaux `add_document`/`remove_document`) → `RuntimeError` dans le générateur → 500. Test déterministe (`RaceDict` fait grossir le dict en cours d'itération) : échoue sans le correctif, passe avec. Vérifié : pytest 1305 passed / 6 skipped, ruff 0, mypy 0 |
 
 ### TODOs techniques (améliorations / nouvelles tâches)
 
@@ -271,6 +272,7 @@ Avant de corriger quoi que ce soit, un agent IA doit :
 | 2026-09-24 | BUG-074 → BUG-077 | Correction | `backend/agent/loop.py`, `backend/bookslm_routes.py`, `frontend/js/bookslm.js`, `frontend/style.css`, `frontend/index.html`, `frontend/locales/{fr,en}.json`, `frontend/sw.js`, `tests/test_agent_loop.py`, `tests/test_bookslm.py`, `tests/frontend/ai.test.mjs`, `tests/frontend/editor-inline.test.mjs`, `CHANGELOG.md`, `docs/ISSUES_TODOLIST.md` | **Lot assistant IA (mode agent)** : (BUG-075) confirmation par lot — `pending.actions` regroupe toutes les mutations d'un tour LLM, un unique bouton « Tout approuver (N) » envoie `confirm_all` (`ToolContext.confirmed`) et n'interrompt plus à chaque action ; les lectures du lot s'exécutent aussitôt. (BUG-074) résumé du bloc d'étapes avec titre de la 1re action + compteur limité aux actions, reprise diffusée dans le même message (fini le « 1 étape » fragmenté). (BUG-076) refresh de l'arborescence débouncé sur les events `tool` mutateurs + `_notifyFileWritten` étendu aux documents (xlsx/docx/csv/pdf). (BUG-077) le bouton d'envoi devient « Stop » pendant le stream (abort SSE, tâche serveur annulée à la déconnexion, marqueur « Exécution arrêtée. »). Guide/i18n FR/EN + `ai.stop`/`ai.stopped`/`ai.confirm_actions`/`ai.action_apply_all` ; `SW_VERSION` v25. Vérifié : pytest 1304 passed / 6 skipped, ruff/mypy 0, validate-imports 40 modules, unit 11/11, ai 100/100, editor-inline 44/44, mobile-editor 35/35, ai-sidebar 6/6, forge 32/32, pane-manager 9/9, sw 8/8. | 🟢 corrigé (en attente vérif utilisateur) |
 
 | 2026-09-24 | #115, #117, BUG-078 | Feature + correction | `frontend/js/themes.js`, `frontend/js/ui.js`, `frontend/js/viewer.js`, `frontend/js/config.js`, `frontend/index.html`, `frontend/style.css`, `frontend/popout.html`, `frontend/locales/{fr,en}.json`, `frontend/icons/avatar/*` (nouveau), `tests/frontend/unit.test.mjs`, `tests/frontend/toolbar-order.test.mjs`, `tests/frontend/settings-order-avatar.test.mjs`, `docs/features/viewer-toolbar-highlight-avatars.md` (nouvelle), `docs/ROADMAP.md`, `CHANGELOG.md` | **#115** barre d'outils de lecture épinglée : `viewer.js`/`popout.html` sortent `.file-actions` de `.file-header` dans un `.file-toolbar` enfant direct de `.content-area` (`position: sticky; top: 0`), masqué en mode lecture. **BUG-078** coloration syntaxique : le basculement des feuilles highlight.js suit le **mode** (`themes.applyTheme` + `ui.initTheme/applyTheme` lisent `obsigate-theme-mode`) au lieu de la clé de thème qui désactivait les deux feuilles. **#117** avatars prédéfinis : galerie de 12 images (`frontend/icons/avatar/`) dans `#cfg-profile`, clic → recadrage 256 px (pipeline import) + `PATCH /api/auth/me`, avatars actifs surlignés (`obsigate-avatar-preset`), import personnalisé et suppression conservés. Vérifié : Playwright (coloration 5/5 déterministe, toolbar épinglée à `barTop` constant au défilement), `unit.test.mjs` 12/12, `toolbar-order` 13/13, `settings-order-avatar` 12/12, JSDOM editor-inline/pane-manager/mobile-editor/image-viewer/pdf-viewer/config-mobile/media-viewer/excalidraw verts, pytest 1304 passed / 6 skipped, ruff/mypy 0, validate-imports 40 modules. | 🟢 corrigé (en attente vérif utilisateur) |
+| 2026-09-24 | BUG-079 | Correction | `backend/main.py`, `tests/test_api_main.py`, `CHANGELOG.md`, `docs/ISSUES_TODOLIST.md` | **BUG-079** : `GET /api/diagnostics` renvoyait 500 « dictionary changed size during iteration ». Le handler itérait `inv.word_index.values()` et `index.items()` en direct alors que l'indexeur les modifiait depuis un autre thread (rebuild initial dans `_search_executor`, hooks incrémentaux `add_document`/`remove_document`) → `RuntimeError` dans le générateur. Correctif : **snapshot avant itération** (`list(index.items())`, `inv.word_index.copy()`) — copie C atomique sous le GIL, pas de verrou ajouté. Test de non-régression déterministe (`RaceDict` fait grossir le dict pendant l'itération ; échoue sans le correctif, passe avec). Vérifié : pytest 1305 passed / 6 skipped, ruff 0, mypy 0 (80 fichiers), validate-imports 40 modules, unit 12/12. | 🟢 corrigé (en attente vérif utilisateur) |
 
 ---
 

docs/ROADMAP.md

@@ -1,6 +1,6 @@
 # ObsiGate — Roadmap
 
-> **Version :** 2.25.0 | **Dernière mise à jour :** 2026-09-24
+> **Version :** 2.27.6 | **Dernière mise à jour :** 2026-09-26
 > **Ce fichier ne contient que le travail à venir** (🔵 En cours + ⚪ Backlog) et un index compact
 > vers les fonctionnalités livrées.
 > - **Méthode de livraison à appliquer pour toute tâche : [DELIVERY_WORKFLOW.md](./DELIVERY_WORKFLOW.md)**
@@ -37,7 +37,7 @@
 - **Reste à faire :**
   - [x] **Signature de l'updater Tauri** (gratuit) : paire de clés générée, `pubkey` renseignée, `createUpdaterArtifacts` activé, secrets CI câblés
   - [x] **Manifeste `latest.json`** généré par `scripts/updater_manifest.py` (intégré à `publish_release.py`), endpoint updater pointé sur `main`
-  - [ ] **Signature de code Windows** : non retenue (pas de certificat) — alternatives : livrer non signé, SignPath.io (OSS gratuit), Certum OSS, Azure Trusted Signing, certificat EV
+  - [ ] **Signature de code Windows** : **non retenue — décision confirmée le 2026-09-26** : livraison non signée + documentation SmartScreen (« Exécuter quand même »). Alternatives écartées sauf retour utilisateur : SignPath.io (OSS gratuit), Certum OSS, Azure Trusted Signing, certificat EV
   - [ ] Exécuter les 6 tests E2E **manuels** — protocole documenté : [DESKTOP_E2E_CHECKLIST.md](./DESKTOP_E2E_CHECKLIST.md)
 
 ---
@@ -47,6 +47,7 @@
 ### 73. Synchronisation multi-appareils — Obsidian Sync compatible
 
 - **Effort :** 6-8 jours | **Impact :** 🟢
+- **Décision 2026-09-26 : reporté (P4)** — axe prioritaire = dette & sécurité (#85/#87) ; #73 hors chemin critique. Si réactivé : partir d'un MVP export/hash/LWW adossé à #59 (PWA offline) + #62 (collab Yjs/CRDT) plutôt qu'un protocole parallèle.
 - **Description :** Synchronisation des vaults entre plusieurs instances d'ObsiGate via un protocole de synchronisation décentralisé ou compatible Obsidian Sync. Alternative self-hosted à Obsidian Sync.
 - **Sous-tâches :**
   - [ ] Protocole : évaluation CRDT vs OT vs diff/patch pour fichiers markdown
@@ -60,60 +61,30 @@
 
 ---
 
-## ⚪ Backlog — Priorité 2 (P2)
-
-### 83. Barre d'outils d'édition mobile — style Obsidian Android
-
-- **Effort :** 3-5 jours | **Impact :** 🟡 | **Zone :** frontend (mobile)
-- **Statut :** ✅ livré — ruban horizontal défilable ancré au-dessus du clavier, commandes étendues et personnalisation persistée. Détail : [archive/COMPLETED_v1-v2.md](./archive/COMPLETED_v1-v2.md) (section #83).
-- **Description :** remplacer la barre de mise en forme Markdown actuelle par un **ruban horizontal
-  défilable** ancré juste au-dessus du clavier virtuel, reprenant l'ergonomie de l'app Android
-  Obsidian : fond anthracite aux coins arrondis, insertion/enrobage de la syntaxe au curseur ou sur
-  la sélection, et personnalisation des commandes via une icône clé à molette.
-- **Sous-tâches :**
-  - [x] Ruban horizontal défilable (glissement tactile gauche/droite) ancré au-dessus du clavier
-  - [x] Actions rapides : annuler, refaire, `[[ ]]` (lien interne), modèle/fichiers, tag `#`, pièce jointe
-  - [x] Formatage : H1–H6, gras, italique, barré (`~~`), surligné (`==`), code en ligne/bloc, citation (`>`)
-  - [x] Liens externes, listes à puces/numérotées, case à cocher (`- [ ]`), indenter / désindenter
-  - [x] Personnalisation (clé à molette) : ajouter / supprimer / réordonner les commandes
-  - [x] i18n FR/EN + tests frontend (helpers purs) + E2E mobile
-
----
-
 ## ⚪ Backlog — Sécurité, architecture & performance (P0/P1)
 
-### 84. Consolidation & sécurité — revue statique 2026-09-13 (phase 1)
-
-- **Effort :** 6-9 jours | **Impact :** 🔴 | **Zone :** backend + frontend | **Référence :** [ISSUES_TODOLIST.md](./ISSUES_TODOLIST.md) BUG-021 → BUG-034
-- **Statut :** 🟢 livré (phase 1) — sanitizer XSS, rate-limit/lockout MFA, isolation vaults, ReDoS, SSRF webhooks, cycle de vie des sessions, politique de mot de passe, verrous `users.json`, audits IP, rate-limit par compte, symlinks, recherche via inverted index, token en cookie HttpOnly. Détail : [archive/COMPLETED_v1-v2.md](./archive/COMPLETED_v1-v2.md) (section #84).
-- **Description :** traiter toutes les vulnérabilités critiques et importantes issues de la revue statique : XSS markdown (`escape=False`) et page publique de partage, brute-force MFA, isolation des vaults (`resolve_safe_path`), ReDoS, SSRF webhooks, cycle de vie des sessions, politique de mot de passe, races `users.json`, audits IP, rate-limit partagé, indexation symlinks.
-- **Sous-tâches :**
-  - [x] Assainir le rendu markdown (sanitizer serveur en whitelist) et la page de partage (échappement `title`/frontmatter) — *DOMPurify client non ajouté (défense en profondeur serveur suffisante)*
-  - [x] Rate-limit + lockout sur les endpoints MFA (`totp/verify`, `recovery`, `webauthn/verify`)
-  - [x] Corriger `resolve_safe_path` (comparaison de chemin stricte par segment) + test de régression
-  - [x] Rotation du refresh token, révocation de l'access token au logout, persistance des JTI révoqués
-  - [x] Valider la politique de mot de passe à la création ; bloquer le SSRF des webhooks et externaliser les secrets
-  - [x] Verrous sur les mutations `users.json` ; consigner l'adresse IP réelle dans les audits
-  - [x] Ignorer les symlinks de l'index ; caps CPU/timeout regex (ReDoS)
-  - [~] Durcir la CSP — *partiel* : directives `object-src`/`base-uri`/`form-action`/`frame-ancestors` ajoutées et token retiré de `sessionStorage` ; migration **nonce** restante (nécessite la conversion des gestionnaires d'événements inline)
-
 ### 85. Refonte architecturale — découpage du monolithe & persistance d'état (phase 2)
 
 - **Effort :** 8-12 jours | **Impact :** 🟡 | **Zone :** backend
-- **Description :** extraire le monolithe `backend/main.py` (~4 260 lignes) en routers FastAPI par domaine et rendre persistant l'état qui ne l'est pas (index de recherche, JTI révoqués, compteurs de rate-limit) pour préparer le multi-nœuds.
+- **Décision 2026-09-26 : prioritaire (axe Dette & sécurité).**
+- **Statut :** 🔵 en cours depuis 2026-09-26 — découpe par tranches à impact minimal (comportement inchangé, un domaine par commit). **T1 livrée (v2.27.2) :** `health` (`/api/health`, `/api/health/detailed` → `backend/routers/health.py`, `HealthResponse` → `schemas.py`). **T2 livrée (v2.27.3) :** `webhooks` (CRUD `/api/webhooks` → `backend/routers/webhooks.py`, logique déjà dans `backend/webhooks.py`). **T3 livrée (v2.27.4) :** `sharing` (`/api/share/*`, `/api/shares`, `/s/{token}*` → `backend/routers/sharing.py`, logique déjà dans `backend/share.py`). **T4 livrée (v2.27.5) :** `backups` (9 routes `/api/file/{vault}/backups|diff|restore` + `/api/backups*` → `backend/routers/backups.py`, `Diff/Restore*` → `schemas.py`, singleton SSE → `backend/sse.py`). **T5 livrée (v2.27.6) :** `search` (11 routes search/tags/suggest/graph/reload → `backend/routers/search.py`, modèles search → `schemas.py`, pool threads → `backend/search_executor.py`).
+- **Description :** extraire le monolithe `backend/main.py` (~4 827 lignes au 2026-09-26, ~17 % du backend) en routers FastAPI par domaine et rendre persistant l'état qui ne l'est pas (index de recherche, JTI révoqués, compteurs de rate-limit) pour préparer le multi-nœuds. L'état mémoire actuel (index, inverted index, vecteurs sémantiques, `SSEManager`, collab) rend le multi-workers unsafe.
 - **Sous-tâches :**
-  - [ ] Routers par domaine : files, search, share, webhooks, plugins, collab, admin, ai
-  - [ ] Centraliser le contrat d'outils IA sur `tools/registry.py` (permissions, quotas, redaction)
-  - [ ] Persister index, JTI révoqués et compteurs de rate-limit (SQLite/Redis)
-  - [ ] Verrous asyncio autour de l'index global et des stores JSON ; service de partage public (expiration, révocation, quotas)
+  - [ ] Routers par domaine : files, search, share, webhooks, plugins, collab, admin, ai — `main.py` conservé comme assemblage (< 500 lignes) ; dédupliquer les modèles Pydantic vers `schemas.py`. **Avancement :** `health` ✅ (T1, `backend/routers/health.py`), `webhooks` ✅ (T2, `backend/routers/webhooks.py`), `sharing` ✅ (T3, `backend/routers/sharing.py`), `backups` ✅ (T4, `backend/routers/backups.py` + `backend/sse.py`), `search` ✅ (T5, `backend/routers/search.py` + `backend/search_executor.py`) ; `tools/registry.py` existe déjà (permissions/quotas/redaction — à compléter, pas à créer)
+  - [ ] Compléter `tools/registry.py` (existant : permissions/quotas/redaction) comme contrat central des outils IA si des manques sont constatés
+  - [ ] Persister index, JTI révoqués et compteurs de rate-limit (SQLite par défaut, Redis en option multi-nœuds ; le rate-limit actuel est in-memory mono-process)
+  - [ ] Verrous asyncio autour de l'index global et des stores JSON ; auditer les `except Exception` larges (> 100 occurrences) : best-effort (backup/audit) vs masquage d'erreur (erreurs typées 4xx/5xx + test)
+  - [ ] Extraire le service de partage public (expiration, révocation, quotas)
 
 ### 87. Amélioration continue — tests, CI/CD, revues de sécurité (phase 4)
 
 - **Effort :** 3-5 jours | **Impact :** 🟡 | **Zone :** `.gitea/workflows/`, `tests/`
-- **Description :** renforcer le pipeline (`.gitea/workflows/ci.yml`, `desktop-build.yml`) pour le rendre bloquant par défaut et accompagner les phases 1 → 3.
+- **Décision 2026-09-26 : prioritaire (axe Dette & sécurité).**
+- **Description :** renforcer le pipeline (`.gitea/workflows/ci.yml`, `desktop-build.yml`) pour le rendre bloquant par défaut et accompagner les phases 1 → 3. Constat 2026-09-26 : job `security` non bloquant (`bandit`/`pip-audit` en `|| echo`, ni semgrep ni trivy), E2E limité à `chromium-desktop`, 5 suites frontend hors CI.
 - **Sous-tâches :**
-  - [ ] Jobs CI sécurité (bandit/semgrep/trivy, audits pip/npm) + tests E2E XSS (page de partage + lecteur markdown)
-  - [ ] Tests de concurrence (`users.json`), fuzzing de timing regex, couverture des composants critiques
+  - [ ] Jobs CI sécurité **bloquants** (bandit/semgrep/trivy, audits pip/npm) + tests E2E XSS (page de partage + lecteur markdown)
+  - [ ] Tests de concurrence (`users.json`), fuzzing de timing regex, couverture des composants critiques ; intégrer au CI les 5 suites frontend hors CI (`upload`, `pretty`, `media-viewer`, `mfa-settings`, `config-ai-keys`)
+  - [ ] Finir BUG-034 (migration CSP **nonce**, conversion des handlers inline), `Secure` cookies à `true` par défaut, politique CORS same-origin explicite ; confirmer la rotation de la clé DeepSeek (BUG-006, clé dans l'historique Git)
   - [ ] Revue périodique des dépendances ; documentation utilisateur FR/EN synchronisée ; contrôle automatisé de la conformité au DoD
 
 ---
@@ -126,6 +97,7 @@
 
 | # | Domaine / fonctionnalité | Version | Détails |
 |---|---|---|---|
+| 152 | Viewer XLSX — affichage multi-feuilles, édition des cellules, téléchargement | 2.27.0 | [archive](./archive/COMPLETED_v1-v2.md) |
 | BUG-047 | Versionnage — source unique `VERSION` + bump SemVer automatique au commit (hooks + tag) | 2.3.0 | [DEVELOPMENT_AND_RELEASES.md](./DEVELOPMENT_AND_RELEASES.md) |
 | 90 | Barre d'actions du document — regroupement fonctionnel + spacers | 2.3.0 | [archive](./archive/COMPLETED_v1-v2.md) |
 | 89 | Drag & drop complet de fichiers/dossiers & intégration Assistant IA | 2.3.0 | [features/drag-and-drop-ai.md](./features/drag-and-drop-ai.md) |
@@ -199,16 +171,17 @@
 
 | Priorité | Items | Effort total estimé |
 |---|---|---|
-| ✅ Complété | #1 → #59, #61–72, #74–76, #78–84, #86, #88–93, #94–100, #102–114, #92 | ~133 jours réalisés |
-| 🔵 P2 restant | #77 Desktop : signature de code (non retenue), 6 tests E2E **manuels** ([protocole](./DESKTOP_E2E_CHECKLIST.md)) | ~0,5-1 jour |
-| ⚪ P4 restant | #73 Sync (6-8j) | 6-8 jours |
-| ⚪ P0/P1 restant | #85, #87 Refonte architecturale, CI/CD (BUG-035 → BUG-040 corrigés, #86 livré) | ~11-17 jours |
-| **Total restant** | **6 items + finitions** | **~23-38 jours** |
+| ✅ Complété | #1 → #59, #61–72, #74–76, #78–84, #86, #88–93, #94–100, #102–115, #117, #92 | ~133 jours réalisés |
+| 🔵 Finitions | #77 Desktop : 6 tests E2E **manuels** ([protocole](./DESKTOP_E2E_CHECKLIST.md)) — signature Windows non retenue (décision 2026-09-26) | ~0,5-1 jour |
+| ⚪ P4 reporté | #73 Sync — **reporté (décision 2026-09-26)**, hors chemin critique | 6-8 jours si réactivé |
+| ⚪ P0/P1 prioritaire | #85, #87 Refonte architecturale, CI/CD (BUG-035 → BUG-040 corrigés, #86 livré) | ~11-17 jours |
+| **Total chemin critique** | **#77 fin + #85 + #87** | **~12-18 jours** |
 
 ---
 
 ## Notes
 
+- **Décisions 2026-09-26 :** axe prioritaire = dette & sécurité (#85/#87) ; #73 Sync reporté (P4, hors chemin critique) ; desktop livré non signé + doc SmartScreen.
 - Les items P3/P4 ne sont pas ordonnés par priorité interne — à raffiner selon les retours utilisateurs.
 - L'effort inclut le développement + tests unitaires + intégration CI, mais pas la documentation utilisateur.
 - Les items marqués 🟢 (nice-to-have) sont de bons candidats pour des contributions externes.

docs/archive/COMPLETED_v1-v2.md

@@ -404,6 +404,21 @@ Deux compléments au bouton « Ajouter » de l'assistant IA.
 
 ---
 
+## #152 — Viewer XLSX : affichage, édition, téléchargement ✅ TERMINÉ
+
+Les fichiers `.xlsx` s'ouvrent dans un dédié : un tableau HTML par feuille (onglets en cas de
+multi-feuilles, en-têtes A1, cellules `contenteditable`), bouton **Enregistrer** actif dès la
+première modification et téléchargement du fichier d'origine.
+
+| Aspect | Détail |
+|---|---|
+| Lecture | `backend/xlsx_reader.py` — openpyxl `read_only`, formules affichées comme texte, plafond 500×40 cellules par feuille |
+| Écriture | `PUT /api/file/{vault}/xlsx/save` → `services/mutations.edit_xlsx_cells` (backup avant écriture, refs A1 validées, `str`→`int`/`float`, 500 cellules max par requête) |
+| Frontend | `renderXlsxViewer` dans `frontend/js/viewer.js` (onglets, cellules sales, Entrée/Échap, collage monoligne) |
+| Limite connue | Le round-trip openpyxl conserve valeurs/formules/styles mais perd graphiques, images et tableaux croisés |
+
+---
+
 ## Grosses fonctionnalités — fiches dédiées
 
 | # | Feature | Version | Fiche |

frontend/js/viewer.js

@@ -995,6 +995,110 @@ export function renderVideoViewer(area, data) {
 }
 
 
+// ── Excel .xlsx — sheet tabs + editable cells ─────────────────────────────
+// Cells are contenteditable; edits are collected per sheet and sent to
+// PUT /api/file/{vault}/xlsx/save. Formula cells show their text and are
+// saved back as formulas (no client-side recalculation — ceiling accepted).
+function renderXlsxViewer(area, data) {
+  const sheets = data.xlsx_sheets || [];
+  const tabs = sheets.length > 1
+    ? `<div class="xlsx-tabs">${sheets.map((s, i) =>
+        `<button class="xlsx-tab${i === 0 ? " active" : ""}" data-sheet="${i}">${escapeHtml(s.name)}</button>`
+      ).join("")}</div>`
+    : "";
+  const panels = sheets.map((s, i) =>
+    `<div class="xlsx-panel" data-sheet="${i}"${i === 0 ? "" : ' style="display:none"'}>${s.html}</div>`
+  ).join("");
+
+  area.innerHTML = `
+    <div class="xlsx-viewer">
+      <div class="xlsx-toolbar">
+        ${tabs}
+        <span class="xlsx-toolbar-actions">
+          <button class="btn-action" id="xlsx-save-btn" disabled>${t("common.save")}</button>
+          <button class="btn-action" id="xlsx-download-btn">
+            <i data-lucide="download" style="width:14px;height:14px"></i> ${t("viewer.download")}
+          </button>
+        </span>
+      </div>
+      <div class="xlsx-panels">${panels}</div>
+    </div>`;
+
+  const saveBtn = area.querySelector("#xlsx-save-btn");
+  const panelEls = [...area.querySelectorAll(".xlsx-panel")];
+  const dirtyCount = () => area.querySelectorAll("td.xlsx-dirty").length;
+  const refreshSaveState = () => { saveBtn.disabled = dirtyCount() === 0; };
+
+  // Editable cells: Enter blurs, Escape reverts, paste stays single-line.
+  area.querySelectorAll(".xlsx-table td").forEach((td) => {
+    td.contentEditable = "true";
+    td.spellcheck = false;
+    td.dataset.orig = td.textContent;
+    td.addEventListener("input", () => {
+      td.classList.add("xlsx-dirty");
+      refreshSaveState();
+    });
+    td.addEventListener("keydown", (e) => {
+      if (e.key === "Enter") { e.preventDefault(); td.blur(); }
+      if (e.key === "Escape") {
+        td.textContent = td.dataset.orig;
+        td.classList.remove("xlsx-dirty");
+        refreshSaveState();
+      }
+    });
+    td.addEventListener("paste", (e) => {
+      e.preventDefault();
+      const text = (e.clipboardData || window.clipboardData).getData("text").replace(/\r?\n/g, " ");
+      document.execCommand("insertText", false, text);
+    });
+  });
+
+  area.querySelectorAll(".xlsx-tab").forEach((tab) => {
+    tab.addEventListener("click", () => {
+      const idx = tab.dataset.sheet;
+      area.querySelectorAll(".xlsx-tab").forEach((x) => x.classList.toggle("active", x === tab));
+      panelEls.forEach((p) => { p.style.display = p.dataset.sheet === idx ? "" : "none"; });
+    });
+  });
+
+  saveBtn.addEventListener("click", async () => {
+    // One PUT per sheet (dirty cells can span tabs before a save).
+    const jobs = panelEls
+      .map((panel) => {
+        const cells = {};
+        panel.querySelectorAll("td.xlsx-dirty").forEach((td) => { cells[td.dataset.cell] = td.textContent; });
+        return { sheet: sheets[Number(panel.dataset.sheet)].name, cells };
+      })
+      .filter((job) => Object.keys(job.cells).length);
+    if (!jobs.length) return;
+    saveBtn.disabled = true;
+    try {
+      for (const job of jobs) {
+        await api(`/api/file/${encodeURIComponent(data.vault)}/xlsx/save?path=${encodeURIComponent(data.path)}`, {
+          method: "PUT",
+          headers: { "Content-Type": "application/json" },
+          body: JSON.stringify(job),
+        });
+      }
+      area.querySelectorAll("td.xlsx-dirty").forEach((td) => {
+        td.classList.remove("xlsx-dirty");
+        td.dataset.orig = td.textContent;
+      });
+      refreshSaveState();
+      showToast(t("editor.saved"), "success");
+    } catch (err) {
+      refreshSaveState();
+      showToast(`${t("editor.save_error")}: ${err.message || err}`, "error");
+    }
+  });
+
+  area.querySelector("#xlsx-download-btn").addEventListener("click", () => {
+    window.open(`/api/file/${encodeURIComponent(data.vault)}/download?path=${encodeURIComponent(data.path)}`, "_blank");
+  });
+
+  safeCreateIcons();
+}
+
 export function renderFile(data) {
   // #93 — An inline edition session (#editor-container mounted in the content
   // area) is destroyed by this very re-render: release it first so the editor
@@ -1058,6 +1162,12 @@ export function renderFile(data) {
     return;
   }
 
+  // Handle Excel .xlsx — editable table view (display / edit / download)
+  if (data.is_xlsx) {
+    renderXlsxViewer(area, data);
+    return;
+  }
+
   // Handle Excalidraw — render in iframe editor
   if (data.is_excalidraw) {
     renderExcalidraw(area, data, data.vault, data.path);

frontend/style.css

@@ -10924,6 +10924,69 @@ body.desktop-mode .editor-container {
   background: var(--surface);
 }
 
+/* ── XLSX Viewer ── */
+.xlsx-toolbar {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin-bottom: 8px;
+  flex-wrap: wrap;
+}
+.xlsx-toolbar-actions {
+  margin-left: auto;
+  display: flex;
+  gap: 8px;
+}
+.xlsx-tabs {
+  display: flex;
+  gap: 4px;
+  flex-wrap: wrap;
+}
+.xlsx-tab {
+  border: 1px solid var(--border);
+  background: var(--surface);
+  color: var(--text-secondary);
+  border-radius: 4px;
+  padding: 4px 10px;
+  font-size: 0.8rem;
+  cursor: pointer;
+}
+.xlsx-tab.active {
+  background: var(--accent, #4a90d9);
+  border-color: var(--accent, #4a90d9);
+  color: #fff;
+}
+.xlsx-table th.xlsx-corner,
+.xlsx-table th.xlsx-rownum {
+  background: var(--surface);
+  color: var(--text-secondary);
+  font-weight: 400;
+  text-align: right;
+  padding: 6px 8px;
+  border-bottom: 2px solid var(--border);
+  border-right: 1px solid var(--border-light, var(--border));
+  position: sticky;
+  left: 0;
+  z-index: 1;
+}
+.xlsx-table th.xlsx-corner {
+  left: 0;
+  top: 0;
+  z-index: 2;
+}
+.xlsx-table td[contenteditable] {
+  cursor: text;
+  min-width: 40px;
+  white-space: pre-wrap;
+}
+.xlsx-table td[contenteditable]:focus {
+  outline: 2px solid var(--accent, #4a90d9);
+  outline-offset: -2px;
+}
+.xlsx-table td.xlsx-dirty {
+  background: rgba(255, 196, 0, 0.18);
+}
+
 /* ── JSON Viewer ── */
 .json-viewer {
   font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "obsigate",
-  "version": "2.25.0",
+  "version": "2.27.6",
   "description": "**Porte d'entrée web ultra-léger pour vos vaults Obsidian** — Accédez, naviguez et recherchez dans toutes vos notes Obsidian depuis n'importe quel appareil via une interface web moderne et responsive.",
   "main": "patch.js",
   "directories": {

tests/test_api_main.py

@@ -460,6 +460,39 @@ class TestConfig:
         # Should have some diagnostic info
         assert len(data) > 0
 
+    def test_diagnostics_concurrent_index_writes(self, client):
+        """Regression: word_index mutated while the handler iterates it raised
+        "dictionary changed size during iteration" -> 500."""
+        from backend.search import get_inverted_index
+
+        inv = get_inverted_index()
+        original = inv.word_index
+
+        class RaceDict(dict):
+            """dict whose .values() grows the dict mid-iteration, exactly like
+            the indexer writing from another thread."""
+            def values(self):
+                it = iter(dict.values(self))
+                first = next(it, _SENTINEL)
+                if first is _SENTINEL:
+                    return iter(())
+                self["__injected__"] = {"__injected_doc__": 1}
+
+                def gen():
+                    yield first
+                    yield from it  # raises RuntimeError: dict changed size
+                return gen()
+
+        _SENTINEL = object()
+        inv.word_index = RaceDict(original)
+        try:
+            resp = client.get("/api/diagnostics")
+            assert resp.status_code == 200, resp.text
+            assert "memory_estimate_mb" in resp.json()["inverted_index"]
+        finally:
+            inv.word_index = original
+            original.pop("__injected__", None)
+
 
 # ═══════════════════════════════════════════════════════════════════
 # Dashboard

tests/test_xlsx_viewer.py

@@ -0,0 +1,152 @@
+"""Display / edit / download for .xlsx files (viewer + PUT xlsx/save)."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+
+openpyxl = pytest.importorskip("openpyxl")
+
+VAULT = "TestVault"
+
+
+@pytest.fixture
+def xlsx_file(test_vault_dir: str) -> str:
+    from openpyxl import Workbook
+
+    path = Path(test_vault_dir) / "budget.xlsx"
+    wb = Workbook()
+    ws = wb.active
+    ws.title = "Budget"
+    ws["A1"] = "Poste"
+    ws["B1"] = 100
+    ws["A2"] = "Total"
+    ws["B2"] = "=B1*2"
+    notes = wb.create_sheet("Notes")
+    notes["A1"] = "hello"
+    wb.save(path)
+    return str(path)
+
+
+# ── Display ───────────────────────────────────────────────────────────────
+
+
+class TestXlsxDisplay:
+    def test_renders_all_sheets(self, client, xlsx_file):
+        resp = client.get(f"/api/file/{VAULT}", params={"path": "budget.xlsx"})
+        assert resp.status_code == 200
+        data = resp.json()
+        assert data["is_xlsx"] is True
+        assert data["unsupported"] is False
+        assert [s["name"] for s in data["xlsx_sheets"]] == ["Budget", "Notes"]
+
+        first = data["xlsx_sheets"][0]["html"]
+        assert "Poste" in first
+        assert 'data-cell="B1"' in first
+        assert "=B1*2" in first  # formula kept as text (data_only=False)
+        assert 'data-cell="A1"' in data["xlsx_sheets"][1]["html"]
+
+    def test_corrupt_xlsx_returns_500(self, client, test_vault_dir):
+        bad = Path(test_vault_dir) / "corrupt.xlsx"
+        bad.write_bytes(b"this is not a zip archive")
+        resp = client.get(f"/api/file/{VAULT}", params={"path": "corrupt.xlsx"})
+        assert resp.status_code == 500
+
+
+# ── Index parity (tree visibility) ────────────────────────────────────────
+
+
+class TestXlsxIndexing:
+    def test_xlsx_in_supported_extensions(self):
+        from backend.indexer import SUPPORTED_EXTENSIONS
+
+        assert ".xlsx" in SUPPORTED_EXTENSIONS
+
+    def test_xlsx_indexed_metadata_only(self, test_vault_dir, xlsx_file):
+        from backend.indexer import _index_single_file_sync
+
+        info = _index_single_file_sync(VAULT, test_vault_dir, xlsx_file)
+        assert info is not None
+        assert info["extension"] == ".xlsx"
+        assert info["content"] == ""  # binary: never read into TF-IDF
+        assert info["title"]  # filename-derived title
+
+
+# ── Edit ──────────────────────────────────────────────────────────────────
+
+
+class TestXlsxSave:
+    def _save(self, client, body, path="budget.xlsx"):
+        return client.put(
+            f"/api/file/{VAULT}/xlsx/save",
+            params={"path": path},
+            json=body,
+        )
+
+    def test_save_updates_cell_with_number_coercion(self, client, xlsx_file):
+        resp = self._save(client, {"sheet": "Budget", "cells": {"B1": "250"}})
+        assert resp.status_code == 200
+        assert resp.json()["status"] == "ok"
+
+        from openpyxl import load_workbook
+
+        wb = load_workbook(xlsx_file)
+        assert wb["Budget"]["B1"].value == 250  # int, not "250"
+
+    def test_save_leaves_other_sheets_and_formulas(self, client, xlsx_file):
+        resp = self._save(client, {"sheet": "Budget", "cells": {"A1": "Titre", "B1": 42}})
+        assert resp.status_code == 200
+
+        from openpyxl import load_workbook
+
+        wb = load_workbook(xlsx_file)
+        assert wb["Budget"]["B2"].value == "=B1*2"
+        assert wb["Notes"]["A1"].value == "hello"
+
+    def test_save_empty_string_clears_cell(self, client, xlsx_file):
+        resp = self._save(client, {"sheet": "Budget", "cells": {"A1": ""}})
+        assert resp.status_code == 200
+
+        from openpyxl import load_workbook
+
+        assert load_workbook(xlsx_file)["Budget"]["A1"].value is None
+
+    def test_save_creates_backup(self, client, xlsx_file):
+        from backend.services.backups import get_backup_dir
+
+        resp = self._save(client, {"sheet": "Budget", "cells": {"A1": "backup-me"}})
+        assert resp.status_code == 200
+        backup_dir = Path(get_backup_dir(VAULT, "budget.xlsx"))
+        assert backup_dir.is_dir()
+        assert list(backup_dir.glob("*.bak"))
+
+    def test_unknown_sheet_400(self, client, xlsx_file):
+        resp = self._save(client, {"sheet": "Nope", "cells": {"A1": "x"}})
+        assert resp.status_code == 400
+
+    def test_invalid_cell_ref_400(self, client, xlsx_file):
+        resp = self._save(client, {"sheet": "Budget", "cells": {"A-1": "x"}})
+        assert resp.status_code == 400
+
+    def test_wrong_extension_400(self, client, test_vault_dir):
+        (Path(test_vault_dir) / "note.md").write_text("# hi\n", encoding="utf-8")
+        resp = self._save(client, {"sheet": "Sheet", "cells": {"A1": "x"}}, path="note.md")
+        assert resp.status_code == 400
+
+    def test_missing_file_404(self, client):
+        resp = self._save(client, {"sheet": "Budget", "cells": {"A1": "x"}}, path="absent.xlsx")
+        assert resp.status_code == 404
+
+    def test_too_many_cells_400(self, client, xlsx_file):
+        cells = {f"A{i}": i for i in range(1, 502)}
+        resp = self._save(client, {"sheet": "Budget", "cells": cells})
+        assert resp.status_code == 400
+
+    def test_nested_value_400(self, client, xlsx_file):
+        resp = self._save(client, {"sheet": "Budget", "cells": {"A1": {"nested": 1}}})
+        assert resp.status_code == 400
+
+    def test_missing_sheet_field_400(self, client, xlsx_file):
+        resp = self._save(client, {"cells": {"A1": "x"}})
+        assert resp.status_code == 400