feat: chat — suppression de post, messages privés, boîte compacte, link preview #191

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 **2.58.0**.
+> [Unreleased](#unreleased). La dernière version livrée est **2.60.0**.
 
 ---
 
@@ -14,6 +14,35 @@ et [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ---
 
+## [2.60.0] — 2026-10-08
+
+---
+
+## [2.59.0] — 2026-10-08
+
+### Ajouté
+
+- **#191 - Chat : suppression de post, messages privés, boîte compacte, link preview**
+  - **Suppression d'un post** : bouton 🗑 sur ses propres messages (et sur
+    tout le monde pour un admin), confirmation, `DELETE /api/chat/{id}` et
+    `/api/chat/dm/{user}/{id}`, retrait en direct chez tous les clients
+    (SSE `chat_deleted`).
+  - **Messages privés 2 utilisateurs** : rangée de canaux au-dessus du fil
+    (« Général » + un bouton par utilisateur), conversations isolées
+    (vault `__dm__`, chemin `alice|bob` trié), placeholder dédié,
+    compteurs de non-lus par canal, `GET /api/chat/users` pour la liste
+    des destinataires (sans hash/mot de passe, sans soi-même).
+  - **Boîte d'édition compacte** : bouton d'envoi réduit à une icône
+    (panneau document + sidebar), la saisie garde toute la largeur.
+  - **Link preview** : métadonnées OpenGraph récupérées à l'envoi
+    (titre, description, image, site), carte cliquable esthétique,
+    garde SSRF réutilisée (host privé/loopback rejeté), cache borné
+    200 entrées, échec silencieux (URL morte → le message passe sans carte).
+  - Tests : pytest +13 (45 au total file_chat), JSDOM `filechat.test.mjs`
+    +5 (16).
+
+---
+
 ## [2.58.0] — 2026-10-08
 
 ### 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-2.58.0-blue.svg)]()
+[![Version](https://img.shields.io/badge/Version-2.60.0-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/)
@@ -976,8 +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 → v2.58.0).
+Consultez le [CHANGELOG.md](./CHANGELOG.md) pour l'historique complet de toutes les versions (v1.0.0 → v2.60.0).
 
 ---
 
-*Projet : ObsiGate | Version : 2.58.0 | Dernière mise à jour : Septembre 2026*
+*Projet : ObsiGate | Version : 2.60.0 | 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-2.58.0-blue.svg)]()
+[![Version](https://img.shields.io/badge/Version-2.60.0-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/)
@@ -1151,8 +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 → v2.58.0).
+See [CHANGELOG.md](./CHANGELOG.md) for the complete version history (v1.0.0 → v2.60.0).
 
 ---
 
-*Project: ObsiGate | Version: 2.58.0 | Last updated: September 2026*
+*Project: ObsiGate | Version: 2.60.0 | Last updated: September 2026*

VERSION

@@ -1 +1 @@
-2.58.0
+2.60.0

backend/file_chat.py

@@ -15,14 +15,18 @@ uploaded under ``data/chat_uploads/``.
 from __future__ import annotations
 
 import hashlib
+import html
 import json
 import logging
+import re
 import shutil
 import time
 import uuid
 from pathlib import Path
 from typing import Any
 
+import httpx
+
 logger = logging.getLogger("obsigate.file_chat")
 
 CHAT_DIR = Path("data/chats")
@@ -33,6 +37,11 @@ MAX_TEXT = 4000  # characters per message
 GLOBAL_VAULT = "__global__"
 GLOBAL_PATH = "general"
 
+# #191 — private (2 users) conversations reuse the same store: the vault is
+# the reserved sentinel and the path is the sorted username pair, so the
+# storage key never depends on who asks.
+DM_VAULT = "__dm__"
+
 # #190 — attachments (image/video) live outside the vaults.
 UPLOAD_DIR = Path("data/chat_uploads")
 MAX_UPLOAD_BYTES = 25 * 1024 * 1024  # 25 MB per attachment
@@ -41,6 +50,10 @@ ALLOWED_ATTACH_EXT = {
     ".mp4", ".webm", ".ogg", ".mov", ".m4v",
 }
 
+# #191 — link preview fetch budget
+PREVIEW_TIMEOUT = 5.0  # seconds
+PREVIEW_MAX_BYTES = 512 * 1024  # only the head of the page is parsed
+
 
 def _chat_file(vault: str, path: str) -> Path:
     """Return the chat file for *(vault, path)* (hashed, traversal-proof)."""
@@ -85,11 +98,13 @@ def add_message(
     user: str,
     text: str,
     attachment: dict[str, Any] | None = None,
+    preview: dict[str, Any] | None = None,
 ) -> dict[str, Any]:
     """Append a message and persist it. Returns the stored message.
 
     The list is capped at :data:`MAX_MESSAGES` (oldest dropped first).
-    *attachment* (#190) is ``{name, url, mime, kind}`` for image/video/url.
+    *attachment* (#190) is ``{name, url, mime, kind}`` for image/video/url;
+    *preview* (#191) is the OpenGraph card of the first URL in *text*.
     """
     text = (text or "").strip()[:MAX_TEXT]
     msg: dict[str, Any] = {
@@ -100,6 +115,8 @@ def add_message(
     }
     if attachment:
         msg["attachment"] = attachment
+    if preview:
+        msg["preview"] = preview
     doc = _read(vault, path)
     return _append(vault, path, doc, msg)
 
@@ -120,6 +137,47 @@ def _append(
     return msg
 
 
+# --- #191 : messages privés (2 utilisateurs) -------------------------------
+
+def dm_path(user_a: str, user_b: str) -> str:
+    """Storage path for the private conversation between two users.
+
+    The pair is sorted so both participants address the same document.
+    """
+    return "|".join(sorted([user_a, user_b]))
+
+
+def get_dm_messages(user_a: str, user_b: str) -> list[dict[str, Any]]:
+    """Return the private history between two users (chronological)."""
+    return get_messages(DM_VAULT, dm_path(user_a, user_b))
+
+
+def add_dm_message(
+    user_a: str,
+    user_b: str,
+    author: str,
+    text: str,
+    attachment: dict[str, Any] | None = None,
+    preview: dict[str, Any] | None = None,
+) -> dict[str, Any]:
+    """Append a private message. Returns the stored message."""
+    return add_message(DM_VAULT, dm_path(user_a, user_b), author, text, attachment, preview)
+
+
+# --- #191 : suppression -----------------------------------------------------
+
+def delete_message(vault: str, path: str, message_id: str) -> bool:
+    """Remove one message from a conversation. True when it existed."""
+    doc = _read(vault, path)
+    messages = list(doc.get("messages", []))
+    kept = [m for m in messages if m.get("id") != message_id]
+    if len(kept) == len(messages):
+        return False
+    doc["messages"] = kept
+    _write(_chat_file(vault, path), doc)
+    return True
+
+
 # --- #190 : chat général (conversation centrale, hors fichier) -------------
 
 def get_global_messages() -> list[dict[str, Any]]:
@@ -131,9 +189,10 @@ def add_global_message(
     user: str,
     text: str,
     attachment: dict[str, Any] | None = None,
+    preview: dict[str, Any] | None = None,
 ) -> dict[str, Any]:
     """Append a message to the general chat. Returns the stored message."""
-    return add_message(GLOBAL_VAULT, GLOBAL_PATH, user, text, attachment)
+    return add_message(GLOBAL_VAULT, GLOBAL_PATH, user, text, attachment, preview)
 
 
 def save_attachment(filename: str, data: bytes) -> dict[str, Any]:
@@ -166,6 +225,75 @@ def save_attachment(filename: str, data: bytes) -> dict[str, Any]:
     }
 
 
+# --- #191 : link preview ----------------------------------------------------
+
+_URL_RE = re.compile(r"https?://[^\s<>\"']+")
+_PREVIEW_CACHE: dict[str, dict[str, Any] | None] = {}
+PREVIEW_CACHE_MAX = 200
+
+
+def _og(content: str, prop: str) -> str:
+    """Extract one OpenGraph/``<title>`` value from an HTML head (regex)."""
+    for pattern in (
+        rf'<meta[^>]+(?:property|name)="{prop}"[^>]+content="([^"]*)"',
+        rf'<meta[^>]+content="([^"]*)"[^>]+(?:property|name)="{prop}"',
+    ):
+        m = re.search(pattern, content, re.IGNORECASE)
+        if m:
+            return html.unescape(m.group(1)).strip()[:300]
+    if prop == "og:title":
+        m = re.search(r"<title[^>]*>([^<]*)</title>", content, re.IGNORECASE)
+        if m:
+            return html.unescape(m.group(1)).strip()[:300]
+    return ""
+
+
+def build_preview(text: str) -> dict[str, Any] | None:
+    """Fetch OpenGraph metadata for the first URL in *text* (#191).
+
+    SSRF-guarded (reuses the web-tool guard), size/time capped, cached in a
+    bounded dict. Returns ``{url, title, description, image, site}`` or
+    ``None`` when there is no URL / the fetch fails (never raises: a dead
+    link must not block the message).
+    """
+    m = _URL_RE.search(text or "")
+    if not m:
+        return None
+    url = m.group(0).rstrip(".,;:!?)")
+    if url in _PREVIEW_CACHE:
+        cached = _PREVIEW_CACHE[url]
+        return dict(cached) if cached else None
+    try:
+        from backend.tools.web import USER_AGENT, _assert_public_http_url
+
+        _assert_public_http_url(url)
+        resp = httpx.get(
+            url,
+            headers={"User-Agent": USER_AGENT, "Accept": "text/html,*/*"},
+            timeout=PREVIEW_TIMEOUT,
+            follow_redirects=True,
+        )
+        if resp.status_code >= 400:
+            raise ValueError(f"HTTP {resp.status_code}")
+        body = resp.text[:PREVIEW_MAX_BYTES]
+        preview = {
+            "url": url,
+            "title": _og(body, "og:title") or _og(body, "og:site_name"),
+            "description": _og(body, "og:description"),
+            "image": _og(body, "og:image"),
+            "site": _og(body, "og:site_name") or (url.split("/")[2] if "/" in url[8:] else url),
+        }
+        if not preview["title"]:
+            raise ValueError("pas de titre")
+    except Exception as e:
+        logger.debug("link preview failed for %s: %s", url, e)
+        preview = None
+    if len(_PREVIEW_CACHE) >= PREVIEW_CACHE_MAX:
+        _PREVIEW_CACHE.pop(next(iter(_PREVIEW_CACHE)))  # oldest first (dict order)
+    _PREVIEW_CACHE[url] = preview
+    return dict(preview) if preview else None
+
+
 def attachment_path(name: str) -> Path | None:
     """Resolve an attachment by its stored name (UUID+ext only, no traversal)."""
     p = Path(name)

backend/routers/file_chat.py

@@ -22,8 +22,9 @@ from fastapi.responses import FileResponse
 
 from backend import file_chat as _store
 from backend.auth.middleware import check_vault_access, require_auth
+from backend.auth.user_store import get_all_users, get_user
 from backend.indexer import get_vault_data
-from backend.schemas import ChatHistoryResponse, ChatMessageResponse
+from backend.schemas import ChatHistoryResponse, ChatMessageResponse, StatusResponse
 from backend.services.paths import resolve_safe_path
 from backend.sse import sse_manager
 
@@ -104,8 +105,10 @@ async def api_chat_post(
     text = str(body.get("text") or "")
     if not text.strip():
         raise HTTPException(400, "text is required")
+    # #191 — best-effort link preview: a dead/slow URL never blocks the post.
     msg = _store.add_global_message(
-        current_user.get("username", ""), text, _attachment(body)
+        current_user.get("username", ""), text, _attachment(body),
+        _store.build_preview(text),
     )
     await sse_manager.broadcast(
         "chat_message",
@@ -136,3 +139,105 @@ async def api_chat_attachment(name: str, current_user: dict[str, Any] = Depends(
         raise HTTPException(404, "Attachment not found")
     info = _store._MIME_BY_EXT.get(path.suffix.lower(), "application/octet-stream")
     return FileResponse(str(path), media_type=info)
+
+
+# --- #191 : suppression + messages privés -----------------------------------
+
+def _owner_or_admin(msg_user: str, current_user: dict[str, Any]) -> None:
+    """A post may be deleted by its author or by an admin."""
+    if current_user.get("role") != "admin" and current_user.get("username") != msg_user:
+        raise HTTPException(403, "Seul l'auteur ou un administrateur peut supprimer ce message")
+
+
+def _find_and_authorize(vault: str, path: str, message_id: str, current_user: dict[str, Any]) -> dict[str, Any]:
+    """Locate *message_id* in the conversation and check the delete right."""
+    for m in _store.get_messages(vault, path):
+        if m.get("id") == message_id:
+            _owner_or_admin(m.get("user", ""), current_user)
+            return m
+    raise HTTPException(404, "Message not found")
+
+
+@router.delete("/api/chat/{message_id}", response_model=StatusResponse)
+async def api_chat_delete(message_id: str, current_user: dict[str, Any] = Depends(require_auth)):
+    """Delete a message from the general chat (author or admin, #191)."""
+    _find_and_authorize(_store.GLOBAL_VAULT, _store.GLOBAL_PATH, message_id, current_user)
+    if not _store.delete_message(_store.GLOBAL_VAULT, _store.GLOBAL_PATH, message_id):
+        raise HTTPException(404, "Message not found")
+    await sse_manager.broadcast(
+        "chat_deleted",
+        {"vault": _store.GLOBAL_VAULT, "path": _store.GLOBAL_PATH, "id": message_id},
+    )
+    return {"status": "deleted"}
+
+
+@router.get("/api/chat/users", response_model=list[dict[str, Any]])
+async def api_chat_users(current_user: dict[str, Any] = Depends(require_auth)):
+    """Usernames available for a private conversation (chat DM picker, #191).
+
+    Every authenticated member may see who else is around — this is a
+    self-hosted portal, not a directory that needs hiding.
+    """
+    me = current_user.get("username", "")
+    return [
+        {"username": u.get("username", ""), "display_name": u.get("display_name") or u.get("username", "")}
+        for u in get_all_users()
+        if u.get("username") and u.get("username") != me
+    ]
+
+
+def _dm_peer(username: str, current_user: dict[str, Any]) -> str:
+    """Validate the DM peer exists and is not ourselves."""
+    if not username or username == current_user.get("username"):
+        raise HTTPException(400, "Destinataire invalide")
+    if not get_user(username):
+        raise HTTPException(404, "Utilisateur inconnu")
+    return username
+
+
+@router.get("/api/chat/dm/{username}", response_model=ChatHistoryResponse)
+async def api_chat_dm_history(username: str, current_user: dict[str, Any] = Depends(require_auth)):
+    """Private history with *username* (#191)."""
+    peer = _dm_peer(username, current_user)
+    return {"messages": _store.get_dm_messages(current_user["username"], peer)}
+
+
+@router.post("/api/chat/dm/{username}", response_model=ChatMessageResponse)
+async def api_chat_dm_post(
+    username: str,
+    body: dict[str, Any] = Body(...),
+    current_user: dict[str, Any] = Depends(require_auth),
+):
+    """Post a private message and broadcast it to both participants (#191)."""
+    peer = _dm_peer(username, current_user)
+    text = str(body.get("text") or "")
+    if not text.strip():
+        raise HTTPException(400, "text is required")
+    msg = _store.add_dm_message(
+        current_user["username"], peer, current_user.get("username", ""), text,
+        _attachment(body), _store.build_preview(text),
+    )
+    # Same shape as the general chat so the client routes on vault/path.
+    await sse_manager.broadcast(
+        "chat_message",
+        {"vault": _store.DM_VAULT, "path": _store.dm_path(current_user["username"], peer), "message": msg},
+    )
+    return {"message": msg, "status": "ok"}
+
+
+@router.delete("/api/chat/dm/{username}/{message_id}", response_model=StatusResponse)
+async def api_chat_dm_delete(
+    username: str,
+    message_id: str,
+    current_user: dict[str, Any] = Depends(require_auth),
+):
+    """Delete one private message (author or admin, #191)."""
+    peer = _dm_peer(username, current_user)
+    vault, path = _store.DM_VAULT, _store.dm_path(current_user["username"], peer)
+    _find_and_authorize(vault, path, message_id, current_user)
+    if not _store.delete_message(vault, path, message_id):
+        raise HTTPException(404, "Message not found")
+    await sse_manager.broadcast(
+        "chat_deleted", {"vault": vault, "path": path, "id": message_id}
+    )
+    return {"status": "deleted"}

backend/schemas.py

@@ -162,6 +162,10 @@ class ChatMessageItem(BaseModel):
         default=None,
         description="Optional image/video/url attachment {name, url, mime, kind}",
     )
+    preview: dict[str, Any] | None = Field(
+        default=None,
+        description="Link preview card {url, title, description, image, site} (#191)",
+    )
 
 
 class ChatHistoryResponse(BaseModel):

desktop/Cargo.lock

@@ -2626,7 +2626,7 @@ dependencies = [
 
 [[package]]
 name = "obsigate-desktop"
-version = "2.58.0"
+version = "2.60.0"
 dependencies = [
  "chrono",
  "env_logger",

desktop/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "obsigate-desktop"
-version = "2.58.0"
+version = "2.60.0"
 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": "2.58.0",
+  "version": "2.60.0",
   "identifier": "com.obsigate.desktop",
   "build": {
     "frontendDist": "../frontend",

docs/GUIDES/PRISE_EN_MAIN.md

@@ -194,6 +194,14 @@ des **onglets** (avec possibilité de vue multi-panneaux / split view).
 - **📎** attache une image ou une vidéo (25 MB max) ; les URL sont cliquables.
 - La **barre de filtre** sert à chercher dans le chat (texte ou auteur) quand
   cet onglet est actif.
+- **🗑** (survol d'un message) : supprime votre message — un administrateur
+  peut supprimer celui de n'importe qui. Confirmation demandée, le retrait
+  est immédiat pour tout le monde.
+- **Messages privés** : la rangée de pastilles au-dessus du fil propose
+  **Général** puis chaque utilisateur ; choisissez un destinataire pour une
+  conversation à deux, avec son propre compteur de non-lus.
+- **Link preview** : coller une URL suffit — titre, description, image et
+  site s'affichent en carte cliquable sous le message (si le site répond).
 
 ---
 

docs/ISSUES_TODOLIST.md

@@ -329,6 +329,7 @@ Avant de corriger quoi que ce soit, un agent IA doit :
 | 2026-10-02 | BUG-107 | Correction | `desktop/tauri.conf.json`, `desktop/src/main.rs` | **BUG-107 — drag & drop de fichiers inutilisable sur desktop** : Tauri/wry installe son propre `IDropTarget` par-dessus de celui du WebView2 (source wry : « Enumerate child windows to find the WebView2 window and override! ») et aucun événement natif n'était écouté → les glisser-déposer depuis l'Explorateur n'atteignaient jamais les gestionnaires HTML5 de `dragdrop.js` (#89 marchait donc uniquement sur le web). Correctif : la doc Tauri est explicite — `disable_drag_drop_handler()` « is required to use HTML5 drag and drop APIs on the frontend on Windows » ; la fenêtre est créée en code (`create: false` dans `tauri.conf.json`, boucle Tauri qui saute les fenêtres non auto-créées) via `WebviewWindowBuilder::from_config(...).disable_drag_drop_handler()`. Vérifié : `cargo test` 26 passed (nouveau garde-fou `test_window_created_without_tauri_drag_drop_handler` : les deux marqueurs obligatoires), lancement de l'app OK (fenêtre unique, boot log normal) ; glisser-déposer réel à valider par l'utilisateur. | 🟢 corrigé |
 | 2026-10-07 | BUG-108 | Correction | `frontend/js/xlsx/context-menu.js` | **BUG-108 — « Coller » du menu contextuel du tableur muet** : `closeContextMenu()` faisait `menu.remove()` **avant** `_menu = null` ; retirer le menu portant le focus émet `focusout` synchrone qui rappelle `closeContextMenu()`, le second `remove()` sur un nœud démonté lève `NotFoundError` et avorte le handler de l'action avant son exécution (introduit par la fermeture au focus #179). Reproduit par l'E2E `xlsx-viewer.spec.js` « coller une plage » (CI #850→#854). Correctif : déférencer avant de retirer. | 🟢 corrigé |
 | 2026-10-08 | #189 | Fonctionnalité | `frontend/js/viewer.js`, `frontend/style.css`, `frontend/locales/{fr,en}.json`, `tests/frontend/xlsx-viewer.test.mjs`, `tests/e2e/xlsx-viewer.spec.js`, `docs/ROADMAP.md`, `docs/features/xlsx-mobile-layout-189.md`, `docs/GUIDES/RECHERCHE_PDF_EXCALIDRAW.md`, `README.md`, `README.fr.md`, `CHANGELOG.md` | **#189 — mise en page mobile du tableur** : sur ≤ 768 px les barres menus/ruban/Recherche sont repliées par défaut (la barre des feuilles + barre formule fx restent visibles, la grille récupère la hauteur perdue), bascule unique `#xlsx-tools-toggle` (☰, `aria-expanded`), cibles tactiles ≥ 44 px, groupes du ruban qui s'enroulent, onglets de feuilles défilants, inputs 16 px (anti-zoom iOS). E2E mobile ajouté + helper `openXlsx()` (déplie le ruban). 10 échecs E2E mobile **préexistants** prouvés par `git stash` (hors périmètre, CI ne lance que desktop). Vérifié : xlsx-viewer.test.mjs 165/165, E2E desktop 19 passed/1 skipped, suite 1628 passed, ruff/mypy 0, CI run #1937 success | ✅ livré (en attente vérif utilisateur) |
+| 2026-10-08 | #191 | Fonctionnalité | `backend/file_chat.py`, `backend/routers/file_chat.py`, `backend/schemas.py`, `frontend/js/filechat.js`, `frontend/js/sync.js`, `frontend/index.html`, `frontend/style.css`, `frontend/locales/{fr,en}.json`, `tests/test_file_chat.py`, `tests/frontend/filechat.test.mjs`, `docs/ROADMAP.md`, `docs/features/file-chat-169.md`, `CHANGELOG.md` | **#191 — chat : suppression de post, messages privés, boîte compacte, link preview** : (A) `DELETE /api/chat/{id}` + `/api/chat/dm/{peer}/{id}` (auteur ou admin, 403 sinon) avec diffusion SSE `chat_deleted` et bouton 🗑 au survol côté client (`confirm()` natif) ; (B) DM 2 utilisateurs : vault `__dm__` + `dm_path(a,b)` trié, `GET /api/chat/users` (destinataires sans soi-même, aucun hash exposé), routes `GET/POST /api/chat/dm/{user}` (404 inconnu, 400 DM à soi), rangée de canaux `.chat-channels` dans la sidebar, non-lus par canal (compteurs localStorage, anciens timestamps/compteurs mélangés unifiés) ; (C) bouton d'envoi réduit à une icône dans les deux formulaires ; (D) `build_preview(text)` : 1ʳᵉ URL → garde SSRF `_assert_public_http_url` → `httpx.get` 5 s/512 Ko → OG (titre/desc/image/site) en carte cliquable, best-effort (échec → message sans carte), cache 200 entrées. Bug trouvé en cours de route : `max_redirects` n'existe pas sur `httpx.get` → TypeError avalé par le `try` = previews jamais générées en prod, invisible des tests (ils mockaient `build_preview`) ; arg retiré + `test_build_preview_happy_path_parses_og` (httpx mocké) ajouté. Tests : pytest 45 file_chat (44→45, +13 sur #191), JSDOM filechat 16 (+5) | 
 | 2026-10-08 | #190 | Fonctionnalité | `backend/file_chat.py`, `backend/routers/file_chat.py`, `backend/schemas.py`, `frontend/js/filechat.js` (réécrit), `frontend/js/viewer.js`, `frontend/js/config.js`, `frontend/js/sidebar.js`, `frontend/js/app.js`, `frontend/index.html`, `frontend/style.css`, `frontend/locales/{fr,en}.json`, `tests/test_file_chat.py`, `tests/frontend/filechat.test.mjs`, `docs/ROADMAP.md`, `CHANGELOG.md` | **#190 — chat : suivi du document, chat général en onglet sidebar, onglets au-dessus du filtre** : (A) l'en-tête du panneau affiche le document ciblé (titre + chemin) et `followFileChat()` appelé par `renderFile()` re-cible le panneau ouvert à chaque changement de document ; (B) onglet **Chat** (dernier) → conversation générale stockée dans le même store #169 via les sentinelles `__global__/general` (`GET/POST /api/chat`), **pastille de messages non lus** (`localStorage` + badge sur l'onglet), **pièces jointes image/vidéo** (`POST /api/chat/upload` : allow-list d'extensions, 25 MB, nom UUID — jamais le nom client ; `GET /api/chat/attachment/{name}` résolu contre l'allow-list), **URL cliquables** dans le rendu (linkification `http(s)://`), date/heure d'envoi ; (C) barre de filtre **déplacée sous les onglets** et routée vers `filterChatMessages()` (texte + auteur) quand l'onglet Chat est actif. Transport : broadcast SSE `chat_message` réutilisé (vault `__global__` route vers le panneau sidebar, sinon panneau fichier) — pas de second WebSocket. Contre-preuves : `__global__` non routé → test « routes __global__ » échoue ; panneau sans classe `active` → le message part en toast au lieu du rendu (révélé par le stub JSDOM). Vérifié : pytest **1655 passed / 2 skipped** (27 tests chat dont 12 nouveaux), ruff 0, mypy 0 (113 fichiers), validate-imports 42 modules/368 exports, unit 13/13, filechat.test.mjs **11/11** (5 nouveaux), toolbar-order, sidebar-filters 8/8 | ✅ livré (en attente vérif utilisateur) |
 | 2026-10-08 | #169 | Fonctionnalité | `backend/file_chat.py` (nouveau), `backend/routers/file_chat.py` (nouveau), `backend/schemas.py`, `backend/main.py`, `frontend/js/filechat.js` (nouveau), `frontend/js/viewer.js`, `frontend/js/sync.js`, `frontend/style.css`, `frontend/locales/{fr,en}.json`, `tests/test_file_chat.py` (nouveau), `tests/frontend/filechat.test.mjs` (nouveau), `tests/frontend/toolbar-order.test.mjs`, `.gitea/workflows/ci.yml`, `docs/ROADMAP.md`, `docs/features/file-chat-169.md` (nouveau), `docs/GUIDES/PRISE_EN_MAIN.md`, `CHANGELOG.md` | **#169 — chat intégré par fichier** : store JSON par (vault, path) sous `data/chats/` (nom SHA-256 → traversal impossible, plafond 500 msgs, texte 4000 car., écriture atomique, fichier corrompu → vide) ; `GET/POST /api/file/{vault}/chat` (auth + `check_vault_access` + `resolve_safe_path`, 400/404/403, `response_model`) + broadcast SSE `chat_message` sur le transport #62 (**pas de 2ᵉ WebSocket**) ; panneau latéral `filechat.js` (bouton 💬 toolbar, rendu chronologique `textContent`, envoi optimiste + dédup par id, toast si panneau fermé/autre fichier, plein écran ≤ 768 px) ; relais SSE en import dynamique dans `sync.js` ; i18n FR/EN 10 clés `chat.*`. En route : tag OpenAPI maison `file-chat` non déclaré → `test_used_tags_are_declared` rouge (retiré, dérivé « Files »), regex navBtns de `toolbar-order.test.mjs` (échappements → `includes`), ruff UP012/TRY004/I001. Vérifié : `test_file_chat.py` 15 passed, `filechat.test.mjs` 6/6, suite 1643 passed, ruff/mypy 0, validate-imports 42 modules, CI run #1938 5/5 success (v2.57.0) | ✅ livré (en attente vérif utilisateur) |
 

docs/ROADMAP.md

@@ -1,6 +1,6 @@
 # ObsiGate — Roadmap
 
-> **Version :** 2.58.0 | **Dernière mise à jour :** 2026-10-08
+> **Version :** 2.60.0 | **Dernière mise à jour :** 2026-10-08
 > **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)**
@@ -731,7 +731,8 @@
 | 188 | Secrets — détection universelle des clés API & mots de passe, masque cliquable (clic = copie) | Unreleased | [features/secret-mask-188.md](./features/secret-mask-188.md) |
 | 189 | Tableur — mise en page mobile : barres repliées par défaut, bascule unique, cibles tactiles 44 px | 2.56.0 | [features/xlsx-mobile-layout-189.md](./features/xlsx-mobile-layout-189.md) |
 | 169 | Chat intégré par fichier (panneau latéral, historique, temps réel SSE, toast de notification) | 2.57.0 | [features/file-chat-169.md](./features/file-chat-169.md) |
-| 190 | Chat — suivi du document, chat général en onglet sidebar (pièces jointes, non lus, recherche), onglets au-dessus du filtre | Unreleased | [features/file-chat-169.md](./features/file-chat-169.md) |
+| 190 | Chat — suivi du document, chat général en onglet sidebar (pièces jointes, non lus, recherche), onglets au-dessus du filtre | 2.58.0 | [features/file-chat-169.md](./features/file-chat-169.md) |
+| 191 | Chat — suppression de post, messages privés 2 utilisateurs (canaux), boîte d'édition compacte, link preview OG | 2.60.0 | [features/file-chat-169.md](./features/file-chat-169.md) |
 | 159 | Desktop — gestion des vaults & dossiers : retrait par menu contextuel + section Configuration (ajout vault/dossier racine) | 2.50.0 | [features/desktop-tauri.md](./features/desktop-tauri.md) |
 | 160 | Desktop — premier lancement professionnel (répertoire `%USERPROFILE%\ObsiGate` + `Prise en main.md`) et section Configuration harmonisée | 2.51.0 | [features/desktop-tauri.md](./features/desktop-tauri.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) |

docs/features/file-chat-169.md

@@ -90,6 +90,67 @@
 - `initSidebarFilter` (`sidebar.js`) : `routeFilter`/`routeClear` routent
   vers `filterChatMessages()` (texte **et** auteur, insensible à la casse).
 
+## #191 — Suppression, messages privés, boîte compacte, link preview (2026-10-08)
+
+### A. Suppression d'un post
+
+- `DELETE /api/chat/{id}` et `DELETE /api/chat/dm/{peer}/{id}` :
+  **auteur du message ou admin** (403 sinon), 404 si l'id n'existe pas.
+- Store : `delete_message(vault, path, id)` — écriture atomique,
+  `False` si absent ; broadcast SSE `chat_deleted` `{vault, path, id}`.
+- Frontend : bouton 🗑 (`.file-chat-del`, visible au survol) rendu dans
+  `_messageEl` uniquement si l'URL de suppression est fournie **et**
+  que l'utilisateur est auteur/admin ; `confirm()` natif ; retrait local
+  + retrait en direct chez tous via `onChatDeleted` (relais `sync.js`).
+
+### B. Messages privés 2 utilisateurs
+
+- Store : `DM_VAULT = "__dm__"`, `dm_path(a, b)` = paire **triée** → les
+  deux participants lisent/écrivent le même document, indépendamment de
+  l'ordre.
+- Routes : `GET /api/chat/users` (destinataires — usernames +
+  display_names, **sans soi-même**, aucun hash/mot de passe exposé),
+  `GET/POST /api/chat/dm/{username}` (404 utilisateur inconnu, 400 DM à
+  soi), `DELETE /api/chat/dm/{username}/{id}`.
+- Frontend : rangée de pastilles `.chat-channels` (« Général » + un
+  bouton par utilisateur) au-dessus du fil ; `_channel` état courant,
+  `_channelKey`/`_channelUrl`/`_channelDelUrl` ; placeholder dédié
+  `chat.placeholder_dm` ; non-lus **par canal** (compteurs dans
+  `localStorage`, l'ancien mélange timestamp/compteur est devenu un
+  compteur unique `{"general": n, "dm:x": n}`, remis à zéro à l'ouverture,
+  pastille = total) ; les DM SSE routés par `_pairOf(path)`.
+
+### C. Boîte d'édition compacte
+
+- Bouton d'envoi réduit à une icône `send` (`.file-chat-send-icon`) dans
+  les deux formulaires (panneau document + sidebar) ; la saisie garde
+  toute la largeur. `safeCreateIcons()` à la fin du `_renderShell`.
+
+### D. Link preview
+
+- `build_preview(text)` (store) : 1ʳᵉ URL du texte → garde SSRF
+  `_assert_public_http_url` (host privé/loopback rejeté, schémas non
+  http refusés) → `httpx.get` 5 s, 512 Ko, `follow_redirects` (limite
+  httpx = 20) → parse OG par regex (`og:title` avec repli `<title>`,
+  `og:description`, `og:image`, `og:site_name`) →
+  `{url, title, description, image, site}`.
+- **Best-effort** : n'importe quelle erreur (URL morte, timeout, garde)
+  → `None`, le message passe quand même ; cache borné **200 entrées**.
+- Frontend : `_previewEl` rend une carte cliquable (vignette lazy
+  `no-referrer`, site en capitales, titre/description tronqués 2 lignes)
+  sous le corps du message.
+- Schéma : `ChatMessageItem.preview`.
+
+### Tests #191
+
+- pytest `TestDelete` (3), `TestPrivateChat` (8), `TestLinkPreview` (6,
+  dont le happy path avec `httpx.get` mocké — un `max_redirects`
+  inexistante sur `httpx.get` levait un TypeError silencieusement avalé
+  par le `try`, testé par `test_build_preview_happy_path_parses_og`).
+- JSDOM `filechat.test.mjs` +5 : carte preview, bouton supprimer
+  (droit auteur/admin), `onChatDeleted`, compteurs non-lus,
+  routage DM isolé du général (16 au total).
+
 ## Décisions
 
 - **SSE plutôt qu'un second WebSocket** : le transport de #62 (EventSource

frontend/index.html

@@ -1072,6 +1072,13 @@
                         role="tabpanel"
                         aria-labelledby="sidebar-tab-chat"
                     >
+                        <!-- #191 : rangée de canaux (Général + utilisateurs) -->
+                        <div
+                            id="sidebar-panel-chat-channels"
+                            class="chat-channels"
+                            role="tablist"
+                            aria-label="Canaux de discussion"
+                        ></div>
                         <div
                             id="sidebar-panel-chat-list"
                             class="file-chat-list sidebar-chat-list"
@@ -1090,7 +1097,7 @@
                             >
                                 <i
                                     data-lucide="paperclip"
-                                    style="width: 16px; height: 16px"
+                                    style="width: 15px; height: 15px"
                                 ></i>
                             </button>
                             <input
@@ -1102,7 +1109,18 @@
                                 autocomplete="off"
                                 aria-label="Écrire un message"
                             />
-                            <button type="submit" class="file-chat-send">Envoyer</button>
+                            <!-- #191 : bouton compact (icône) pour laisser la place à la saisie -->
+                            <button
+                                type="submit"
+                                class="file-chat-send file-chat-send-icon"
+                                title="Envoyer"
+                                aria-label="Envoyer"
+                            >
+                                <i
+                                    data-lucide="send"
+                                    style="width: 15px; height: 15px"
+                                ></i>
+                            </button>
                         </form>
                     </div>
 

frontend/js/filechat.js

@@ -12,20 +12,23 @@
 import { api, AuthManager } from "./auth.js";
 import { t } from "./i18n.js";
 import { showToast } from "./ui.js";
-import { escapeHtml } from "./utils.js";
+import { escapeHtml, safeCreateIcons } from "./utils.js";
 
 const PANEL_ID = "file-chat-panel";
 const GLOBAL_VAULT = "__global__";
-const UNREAD_KEY = "obsigate-chat-unread"; // {general: ts}
+const DM_VAULT = "__dm__";
+const UNREAD_KEY = "obsigate-chat-unread"; // {general: ts, "dm:<user>": ts}
 
 let _vault = null;
 let _path = null;
 let _title = "";
 let _sending = false;
 
-// État du chat général (onglet sidebar)
+// État du chat sidebar (#190 B + #191 : canaux général / privé)
-let _generalMessages = [];
+let _channel = { type: "general" }; // ou {type: "dm", user: "bob"}
-let _generalLoaded = false;
+let _channelMessages = [];
+let _channelLoaded = false;
+let _usersCache = null; // liste des destinataires DM (une seule requête)
 let _pendingAttach = null;
 
 // ---------------------------------------------------------------------------
@@ -90,7 +93,65 @@ function _attachEl(att) {
   return null;
 }
 
-export function _messageEl(m, currentUser) {
+// #191 — suppression : auteur ou admin, avec confirmation native.
+function _canDelete(m, currentUser) {
+  const u = AuthManager.getUser();
+  if (!u || !u.username) return false;
+  return u.role === "admin" || m.user === u.username;
+}
+
+async function _deleteMessage(delUrl, id, wrap) {
+  if (!window.confirm(t("chat.delete_confirm"))) return;
+  try {
+    await api(`${delUrl}/${encodeURIComponent(id)}`, { method: "DELETE" });
+    wrap.remove();
+  } catch (_) {
+    showToast(t("chat.delete_error"), "error");
+  }
+}
+
+// #191 — carte de lien : site, titre, description, vignette.
+function _previewEl(p) {
+  const card = document.createElement("a");
+  card.className = "file-chat-preview";
+  card.href = p.url;
+  card.target = "_blank";
+  card.rel = "noopener noreferrer";
+  if (p.image) {
+    const img = document.createElement("img");
+    img.className = "file-chat-preview-img";
+    img.src = p.image;
+    img.alt = "";
+    img.loading = "lazy";
+    img.referrerPolicy = "no-referrer";
+    card.appendChild(img);
+  }
+  const meta = document.createElement("div");
+  meta.className = "file-chat-preview-meta";
+  const site = document.createElement("div");
+  site.className = "file-chat-preview-site";
+  site.textContent = p.site || "";
+  const title = document.createElement("div");
+  title.className = "file-chat-preview-title";
+  title.textContent = p.title || p.url;
+  meta.appendChild(site);
+  meta.appendChild(title);
+  if (p.description) {
+    const desc = document.createElement("div");
+    desc.className = "file-chat-preview-desc";
+    desc.textContent = p.description;
+    meta.appendChild(desc);
+  }
+  card.appendChild(meta);
+  return card;
+}
+
+/**
+ * Render one message.
+ * *delUrl* (#191) is the DELETE endpoint base for this conversation; when
+ * provided the author/admin sees a trash button on their own messages.
+ */
+export function _messageEl(m, currentUser, delUrl) {
   const mine = currentUser && m.user === currentUser;
   const wrap = document.createElement("div");
   wrap.className = "file-chat-msg" + (mine ? " mine" : "");
@@ -100,6 +161,16 @@ export function _messageEl(m, currentUser) {
   meta.innerHTML =
     `<span class="file-chat-user">${_esc(m.user)}</span>` +
     `<span class="file-chat-ts">${_esc(_formatTime(m.ts))}</span>`;
+  if (delUrl && _canDelete(m, currentUser)) {
+    const del = document.createElement("button");
+    del.type = "button";
+    del.className = "file-chat-del";
+    del.title = t("chat.delete");
+    del.setAttribute("aria-label", t("chat.delete"));
+    del.textContent = "🗑";
+    del.addEventListener("click", () => _deleteMessage(delUrl, m.id, wrap));
+    meta.appendChild(del);
+  }
   const body = document.createElement("div");
   body.className = "file-chat-body";
   _fillBody(body, m.text);
@@ -107,10 +178,11 @@ export function _messageEl(m, currentUser) {
   if (m.text) wrap.appendChild(body);
   const att = _attachEl(m.attachment);
   if (att) wrap.appendChild(att);
+  if (m.preview) wrap.appendChild(_previewEl(m.preview));
   return wrap;
 }
 
-export function renderChatMessages(container, messages, currentUser) {
+export function renderChatMessages(container, messages, currentUser, delUrl) {
   container.innerHTML = "";
   if (!messages || messages.length === 0) {
     const empty = document.createElement("div");
@@ -119,16 +191,16 @@ export function renderChatMessages(container, messages, currentUser) {
     container.appendChild(empty);
     return;
   }
-  messages.forEach((m) => container.appendChild(_messageEl(m, currentUser)));
+  messages.forEach((m) => container.appendChild(_messageEl(m, currentUser, delUrl)));
   container.scrollTop = container.scrollHeight;
 }
 
-function _appendMessage(list, m) {
+function _appendMessage(list, m, delUrl) {
   const empty = list.querySelector(".file-chat-empty");
   if (empty) empty.remove();
   const id = m.id;
   if (id && list.querySelector(`[data-id="${CSS.escape(id)}"]`)) return false;
-  list.appendChild(_messageEl(m, _currentUser()));
+  list.appendChild(_messageEl(m, _currentUser(), delUrl));
   list.scrollTop = list.scrollHeight;
   return true;
 }
@@ -203,8 +275,11 @@ function _renderShell(panel) {
   input.setAttribute("aria-label", t("chat.placeholder"));
   const send = document.createElement("button");
   send.type = "submit";
-  send.className = "file-chat-send";
+  send.className = "file-chat-send file-chat-send-icon";
-  send.textContent = t("chat.send");
+  send.title = t("chat.send");
+  send.setAttribute("aria-label", t("chat.send"));
+  // #191 : icône compacte — la saisie garde toute la largeur
+  send.innerHTML = '<i data-lucide="send" style="width:15px;height:15px"></i>';
   form.appendChild(input);
   form.appendChild(send);
   form.addEventListener("submit", (e) => {
@@ -215,6 +290,7 @@ function _renderShell(panel) {
   panel.appendChild(header);
   panel.appendChild(list);
   panel.appendChild(form);
+  safeCreateIcons(); // #191 — hydrate l'icône d'envoi
 }
 
 export async function openFileChat(vault, path, title) {
@@ -272,21 +348,76 @@ async function _send(input) {
 }
 
 // ---------------------------------------------------------------------------
-// 2. Chat général, onglet sidebar (#190 B)
+// 2. Chat sidebar (#190 B) + canaux privé #191
 // ---------------------------------------------------------------------------
 function _sidebarList() {
   return document.getElementById("sidebar-panel-chat-list");
 }
 
-/** Charge (ou recharge) l'historique du chat général dans la sidebar. */
+/** Clé de la conversation courante (unread + sélection). */
+function _channelKey() {
+  return _channel.type === "dm" ? `dm:${_channel.user}` : "general";
+}
+
+/** URL d'API de base du canal courant. */
+function _channelUrl() {
+  return _channel.type === "dm"
+    ? `/api/chat/dm/${encodeURIComponent(_channel.user)}`
+    : "/api/chat";
+}
+
+/** URL de base de suppression du canal courant. */
+function _channelDelUrl() {
+  return _channel.type === "dm"
+    ? `/api/chat/dm/${encodeURIComponent(_channel.user)}`
+    : "/api/chat";
+}
+
+/** Rend la rangée de canaux : Général + un bouton par utilisateur. */
+function _renderChannels(users) {
+  const holder = document.getElementById("sidebar-panel-chat-channels");
+  if (!holder) return;
+  holder.innerHTML = "";
+  const mk = (label, active, onClick, title) => {
+    const b = document.createElement("button");
+    b.type = "button";
+    b.className = "chat-channel" + (active ? " active" : "");
+    b.textContent = label;
+    if (title) b.title = title;
+    b.addEventListener("click", onClick);
+    holder.appendChild(b);
+    return b;
+  };
+  mk(t("chat.channel_general"), _channel.type === "general", () => switchChannel(null));
+  (users || []).forEach((u) => {
+    mk(u.display_name || u.username, _channel.type === "dm" && _channel.user === u.username,
+       () => switchChannel(u.username), `@${u.username}`);
+  });
+}
+
+/** Charge la liste des utilisateurs (une fois) puis rend les canaux. */
+async function _loadUsers() {
+  if (_usersCache) return _usersCache;
+  try {
+    const data = await api("/api/chat/users");
+    _usersCache = Array.isArray(data) ? data : [];
+  } catch (_) {
+    _usersCache = [];
+  }
+  return _usersCache;
+}
+
+/** Charge (ou recharge) l'historique du canal courant dans la sidebar. */
 export async function openSidebarChat() {
   const list = _sidebarList();
   if (!list) return;
+  const users = await _loadUsers();
+  _renderChannels(users);
   try {
-    const data = await api("/api/chat");
+    const data = await api(_channelUrl());
-    _generalMessages = (data.messages || []).slice();
+    _channelMessages = (data.messages || []).slice();
-    _generalLoaded = true;
+    _channelLoaded = true;
-    renderChatMessages(list, _generalMessages, _currentUser());
+    renderChatMessages(list, _channelMessages, _currentUser(), _channelDelUrl());
     _clearUnread();
   } catch (_) {
     list.innerHTML = "";
@@ -297,17 +428,27 @@ export async function openSidebarChat() {
   }
 }
 
-/** Recherche dans le chat général (barre de filtre sidebar) — #190 C. */
+/** Change de canal (#191) : null = général, sinon l'username du pair. */
+export function switchChannel(user) {
+  _channel = user ? { type: "dm", user } : { type: "general" };
+  const input = _sendInput();
+  if (input) {
+    input.placeholder = user ? t("chat.placeholder_dm", { user }) : t("chat.placeholder");
+  }
+  openSidebarChat();
+}
+
+/** Recherche dans le canal courant (barre de filtre sidebar) — #190 C. */
 export function filterChatMessages(query) {
   const list = _sidebarList();
-  if (!list || !_generalLoaded) return;
+  if (!list || !_channelLoaded) return;
   const q = String(query || "").toLowerCase().trim();
   const shown = q
-    ? _generalMessages.filter((m) =>
+    ? _channelMessages.filter((m) =>
         ((m.text || "") + " " + (m.user || "")).toLowerCase().includes(q),
       )
-    : _generalMessages;
+    : _channelMessages;
-  renderChatMessages(list, shown, _currentUser());
+  renderChatMessages(list, shown, _currentUser(), _channelDelUrl());
 }
 
 function _sendInput() {
@@ -344,14 +485,14 @@ export async function sendGeneralMessage() {
   const body = { text };
   if (_pendingAttach) body.attachment = _pendingAttach;
   try {
-    const data = await api("/api/chat", { method: "POST", body: JSON.stringify(body) });
+    const data = await api(_channelUrl(), { method: "POST", body: JSON.stringify(body) });
     input.value = "";
     _pendingAttach = null;
     _renderPending();
     const list = _sidebarList();
     if (list) {
-      _generalMessages.push(data.message);
+      _channelMessages.push(data.message);
-      _appendMessage(list, data.message);
+      _appendMessage(list, data.message, _channelDelUrl());
     }
     input.focus();
   } catch (_) {
@@ -387,7 +528,9 @@ export async function pickAttachment() {
   });
 }
 
-// --- Messages non lus (#190 B) --------------------------------------------
+// --- Messages non lus (#190 B / #191) --------------------------------------
+// Compteurs par clé de canal : {"general": 2, "dm:bob": 1}. Ouverture du
+// canal → remise à zéro de sa clé.
 function _readUnread() {
   try {
     return JSON.parse(localStorage.getItem(UNREAD_KEY) || "{}") || {};
@@ -396,13 +539,23 @@ function _readUnread() {
   }
 }
 
-function _clearUnread() {
+function _writeUnread(u) {
-  const u = _readUnread();
-  u.general = Math.floor(Date.now() / 1000);
   try {
     localStorage.setItem(UNREAD_KEY, JSON.stringify(u));
   } catch (_) { /* quota */ }
-  _renderBadge(0);
+}
+
+function _clearUnread() {
+  const u = _readUnread();
+  u[_channelKey()] = 0;
+  _writeUnread(u);
+  _renderBadge(_totalUnread());
+  _renderChannels(_usersCache);
+}
+
+function _totalUnread() {
+  const u = _readUnread();
+  return Object.values(u).reduce((n, v) => n + (typeof v === "number" ? v : 0), 0);
 }
 
 function _renderBadge(count) {
@@ -421,13 +574,9 @@ function _renderBadge(count) {
   badge.textContent = count > 99 ? "99+" : String(count);
 }
 
-/** Compte les messages reçus depuis la dernière visite. */
+/** Affiche le total des messages non lus (tous canaux confondus). */
-export function refreshUnreadBadge(messages) {
+export function refreshUnreadBadge() {
-  const list = messages || _generalMessages;
+  _renderBadge(_totalUnread());
-  if (!list.length) return _renderBadge(0);
-  const seen = _readUnread().general || 0;
-  const count = list.filter((m) => (m.ts || 0) > seen && m.user !== _currentUser()).length;
-  _renderBadge(count);
 }
 
 /** Initialisation : formulaire + raccourcis clavier. */
@@ -456,18 +605,20 @@ export function initSidebarChat() {
 // ---------------------------------------------------------------------------
 export function onChatMessage(data) {
   if (!data || !data.message) return;
-  const isGeneral = data.vault === GLOBAL_VAULT;
 
-  if (isGeneral) {
+  // --- Canaux sidebar : général (#190) ou privé (#191) ---
-    _generalMessages.push(data.message);
+  if (data.vault === GLOBAL_VAULT || data.vault === DM_VAULT) {
-    const list = _sidebarList();
+    const key = data.vault === DM_VAULT ? `dm:${_pairOf(data.path)}` : "general";
+    const isActive = key === _channelKey();
     const panel = document.getElementById("sidebar-panel-chat");
     const visible = panel && panel.classList.contains("active");
-    if (list && visible) {
+    if (isActive) _channelMessages.push(data.message);
-      _appendMessage(list, data.message);
+    if (visible && isActive) {
+      _appendMessage(_sidebarList(), data.message, _channelDelUrl());
       _clearUnread();
     } else if (data.message.user !== _currentUser()) {
-      refreshUnreadBadge(_generalMessages);
+      _bumpUnread(key);
+      refreshUnreadBadge();
       showToast(t("chat.new_message", { user: data.message.user }), "info");
     }
     return;
@@ -486,3 +637,23 @@ export function onChatMessage(data) {
   if (data.message.user === _currentUser()) return; // son propre message
   showToast(t("chat.new_message", { user: data.message.user }), "info");
 }
+
+/** Le path DM est « alice|bob » trié : on en déduit l'interlocuteur. */
+function _pairOf(path) {
+  const me = _currentUser();
+  const parts = String(path || "").split("|");
+  return parts[0] === me ? parts[1] : parts[0];
+}
+
+function _bumpUnread(key) {
+  const u = _readUnread();
+  u[key] = (u[key] || 0) + 1;
+  _writeUnread(u);
+}
+
+/** Suppression d'un post (#191) — relayée par sync.js. */
+export function onChatDeleted(data) {
+  if (!data || !data.id) return;
+  const sel = `[data-id="${CSS.escape(data.id)}"]`;
+  document.querySelectorAll(sel).forEach((el) => el.remove());
+}

frontend/js/sync.js

@@ -120,7 +120,7 @@ export const IndexUpdateManager = (() => {
       }
     });
 
-    // #169 — Chat par fichier : relais du broadcast SSE vers le panneau
+    // #169/#190 — Chat : relais des broadcasts SSE vers les panneaux
     eventSource.addEventListener("chat_message", (e) => {
       try {
         const data = JSON.parse(e.data);
@@ -130,6 +130,16 @@ export const IndexUpdateManager = (() => {
       }
     });
 
+    // #191 — suppression d'un post
+    eventSource.addEventListener("chat_deleted", (e) => {
+      try {
+        const data = JSON.parse(e.data);
+        import("./filechat.js").then((m) => m.onChatDeleted(data)).catch(() => {});
+      } catch (err) {
+        console.error("SSE parse error:", err);
+      }
+    });
+
     eventSource.onerror = () => {
       connectionState = "disconnected";
       _updateBadge();

frontend/locales/en.json

@@ -320,6 +320,10 @@
   "backups.title": "Backups",
   "button.cancel": "Cancel",
   "chat.attach_error": "Attachment upload failed",
+  "chat.channel_general": "General",
+  "chat.delete": "Delete this message",
+  "chat.delete_confirm": "Delete this message?",
+  "chat.delete_error": "Delete failed",
   "chat.attach_remove": "Remove attachment",
   "chat.button": "Chat",
   "chat.button_title": "Discuss this file",
@@ -328,6 +332,7 @@
   "chat.load_error": "Could not load the discussion",
   "chat.new_message": "New message from {user}",
   "chat.placeholder": "Write a message…",
+  "chat.placeholder_dm": "Private message to {user}…",
   "chat.send": "Send",
   "chat.send_error": "Failed to send the message",
   "chat.tab": "General chat",

frontend/locales/fr.json

@@ -320,6 +320,10 @@
   "backups.title": "Backups",
   "button.cancel": "Annuler",
   "chat.attach_error": "Échec de l'envoi de la pièce jointe",
+  "chat.channel_general": "Général",
+  "chat.delete": "Supprimer ce message",
+  "chat.delete_confirm": "Supprimer ce message ?",
+  "chat.delete_error": "Échec de la suppression",
   "chat.attach_remove": "Retirer la pièce jointe",
   "chat.button": "Chat",
   "chat.button_title": "Discuter de ce fichier",
@@ -328,6 +332,7 @@
   "chat.load_error": "Impossible de charger la discussion",
   "chat.new_message": "Nouveau message de {user}",
   "chat.placeholder": "Écrire un message…",
+  "chat.placeholder_dm": "Message privé à {user}…",
   "chat.send": "Envoyer",
   "chat.send_error": "Échec de l'envoi du message",
   "chat.tab": "Chat général",

frontend/style.css

@@ -13887,6 +13887,116 @@ body.reading-mode .file-actions {
   }
 }
 
+/* ---------------------------------------------------------------------------
+   #191 — Chat : canaux, suppression, bouton compact, link preview
+--------------------------------------------------------------------------- */
+.chat-channels {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+  padding: 8px 10px 0;
+}
+.chat-channel {
+  border: 1px solid var(--border, #21262d);
+  border-radius: 999px;
+  background: var(--bg-secondary, #161b22);
+  color: var(--text-muted, #8b949e);
+  font-size: 0.78rem;
+  padding: 4px 10px;
+  cursor: pointer;
+  max-width: 100%;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.chat-channel:hover {
+  color: var(--text-primary, #e6edf3);
+  border-color: var(--accent, #58a6ff);
+}
+.chat-channel.active {
+  background: var(--accent, #58a6ff);
+  border-color: var(--accent, #58a6ff);
+  color: #fff;
+}
+/* Bouton d'envoi compact : une icône, la saisie garde la largeur */
+.file-chat-send-icon {
+  padding: 6px 8px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+/* Suppression d'un post */
+.file-chat-del {
+  border: none;
+  background: transparent;
+  cursor: pointer;
+  font-size: 0.75rem;
+  padding: 0 2px;
+  opacity: 0;
+  transition: opacity 0.12s;
+}
+.file-chat-msg:hover .file-chat-del {
+  opacity: 0.7;
+}
+.file-chat-del:hover {
+  opacity: 1 !important;
+}
+/* Link preview (#191) */
+.file-chat-preview {
+  display: flex;
+  gap: 10px;
+  margin-top: 8px;
+  padding: 8px;
+  border: 1px solid var(--border, #21262d);
+  border-left: 3px solid var(--accent, #58a6ff);
+  border-radius: 8px;
+  background: var(--bg-secondary, #161b22);
+  text-decoration: none;
+  color: inherit;
+  max-width: 100%;
+}
+.file-chat-preview:hover {
+  border-color: var(--accent, #58a6ff);
+}
+.file-chat-preview-img {
+  width: 72px;
+  height: 72px;
+  object-fit: cover;
+  border-radius: 6px;
+  flex-shrink: 0;
+  background: var(--bg-hover, rgba(128, 128, 128, 0.12));
+}
+.file-chat-preview-meta {
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+.file-chat-preview-site {
+  font-size: 0.68rem;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  color: var(--accent, #58a6ff);
+}
+.file-chat-preview-title {
+  font-size: 0.85rem;
+  font-weight: 600;
+  color: var(--text-primary, #e6edf3);
+  overflow: hidden;
+  display: -webkit-box;
+  -webkit-line-clamp: 2;
+  -webkit-box-orient: vertical;
+}
+.file-chat-preview-desc {
+  font-size: 0.75rem;
+  color: var(--text-muted, #8b949e);
+  overflow: hidden;
+  display: -webkit-box;
+  -webkit-line-clamp: 2;
+  -webkit-box-orient: vertical;
+}
+
+
 /* ---------------------------------------------------------------------------
    #190 — Chat : en-tête ciblé, onglet sidebar, pièces jointes, badge
 --------------------------------------------------------------------------- */

package.json

@@ -1,6 +1,6 @@
 {
   "name": "obsigate",
-  "version": "2.58.0",
+  "version": "2.60.0",
   "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/frontend/filechat.test.mjs

@@ -69,10 +69,15 @@ globalThis.fetch = (url) => {
 const { initI18n } = await import(pathToFileURL(path.join(JS_DIR, "i18n.js")).href);
 await initI18n();
 
+// #191 — the delete right needs a logged-in identity
+const { AuthManager } = await import(pathToFileURL(path.join(JS_DIR, "auth.js")).href);
+AuthManager.getUser = () => ({ username: "bruno", role: "user" });
+
 const mod = await import("../../frontend/js/filechat.js");
 const {
   renderChatMessages, onChatMessage, openFileChat, closeFileChat, toggleFileChat,
   followFileChat, openSidebarChat, filterChatMessages, refreshUnreadBadge,
+  onChatDeleted,
 } = mod;
 
 let pass = 0;
@@ -211,6 +216,68 @@ test("#190 — URL rendered as a link, surrounding text stays plain", async () =
   assert.ok(msg.textContent.includes("du texte"));
 });
 
+test("#191 — preview card rendered with site/title/description", () => {
+  const list = document.createElement("div");
+  renderChatMessages(list, [{
+    id: "p1", user: "alice", text: "voir https://example.com", ts: 40,
+    preview: { url: "https://example.com", title: "Mon site", description: "Le desc", image: "", site: "example.com" },
+  }], "bruno");
+  const card = list.querySelector("a.file-chat-preview");
+  assert.ok(card, "carte preview présente");
+  assert.strictEqual(card.href, "https://example.com/");
+  assert.strictEqual(card.target, "_blank");
+  assert.strictEqual(card.querySelector(".file-chat-preview-title").textContent, "Mon site");
+  assert.strictEqual(card.querySelector(".file-chat-preview-desc").textContent, "Le desc");
+  assert.strictEqual(card.querySelector(".file-chat-preview-site").textContent, "example.com");
+  renderChatMessages(list, [{ id: "p2", user: "alice", text: "https://x.test", ts: 41 }], "bruno");
+  assert.strictEqual(list.querySelector("a.file-chat-preview"), null);
+});
+
+test("#191 — delete button hidden without delUrl, shown for own post", () => {
+  const list = document.createElement("div");
+  renderChatMessages(list, [{ id: "d1", user: "bruno", text: "x", ts: 50 }], "bruno");
+  assert.strictEqual(list.querySelector(".file-chat-del"), null);
+  renderChatMessages(list, [{ id: "d2", user: "bruno", text: "x", ts: 51 }], "bruno", "/api/chat");
+  assert.ok(list.querySelector(".file-chat-del"), "bouton suppression visible");
+  renderChatMessages(list, [{ id: "d3", user: "alice", text: "x", ts: 52 }], "bruno", "/api/chat");
+  assert.strictEqual(list.querySelector(".file-chat-del"), null);
+});
+
+test("#191 — onChatDeleted removes the message from any list", async () => {
+  await openSidebarChat();
+  const list = document.getElementById("sidebar-panel-chat-list");
+  onChatMessage({ vault: "__global__", path: "general", message: { id: "del1", user: "alice", text: "a bientot", ts: 60 } });
+  assert.strictEqual(list.querySelector('[data-id="del1"]') !== null, true);
+  onChatDeleted({ vault: "__global__", path: "general", id: "del1" });
+  assert.strictEqual(list.querySelector('[data-id="del1"]'), null);
+});
+
+test("#191 — unread counters accumulate then reset on open", async () => {
+  localStorage.removeItem("obsigate-chat-unread");
+  const panel = document.getElementById("sidebar-panel-chat");
+  panel.classList.remove("active");
+  onChatMessage({ vault: "__global__", path: "general", message: { id: "u-1", user: "bob", text: "1", ts: 70 } });
+  onChatMessage({ vault: "__global__", path: "general", message: { id: "u-2", user: "bob", text: "2", ts: 71 } });
+  let u = JSON.parse(localStorage.getItem("obsigate-chat-unread"));
+  assert.strictEqual(u.general, 2);
+  refreshUnreadBadge();
+  assert.strictEqual(document.querySelector("#sidebar-tab-chat .chat-unread-badge").textContent, "2");
+  panel.classList.add("active");
+  await openSidebarChat();
+  u = JSON.parse(localStorage.getItem("obsigate-chat-unread"));
+  assert.strictEqual(u.general, 0);
+  assert.strictEqual(document.querySelector("#sidebar-tab-chat .chat-unread-badge"), null);
+});
+
+test("#191 — DM routed by pair path, isolated from general", async () => {
+  const list = document.getElementById("sidebar-panel-chat-list");
+  const before = list.querySelectorAll(".file-chat-msg").length;
+  onChatMessage({ vault: "__dm__", path: "alice|bruno", message: { id: "dm-1", user: "alice", text: "prive", ts: 80 } });
+  const u = JSON.parse(localStorage.getItem("obsigate-chat-unread"));
+  assert.strictEqual(u["dm:alice"], 1);
+  assert.strictEqual(list.querySelectorAll(".file-chat-msg").length, before);
+});
+
 // Sequential execution: each case depends on panel state left by the previous.
 for (const [name, fn] of cases) {
   try {

tests/test_file_chat.py

@@ -8,6 +8,13 @@ import pytest
 from backend import file_chat as _store
 
 
+def _login(client, username="admin", password="chab30") -> dict:
+    """Log in against the auth-enabled ``admin_client`` fixture (#191)."""
+    resp = client.post("/api/auth/login", json={"username": username, "password": password})
+    assert resp.status_code == 200, resp.text
+    return {"Authorization": f"Bearer {resp.json()['access_token']}"}
+
+
 @pytest.fixture(autouse=True)
 def _isolated_chat_dir(tmp_path, monkeypatch):
     """Keep every test (store AND routes) out of the real ``data/chats``/
@@ -207,3 +214,153 @@ class TestAttachments:
         r = client.post("/api/chat", json={"text": "voici", "attachment": att})
         assert r.status_code == 200
         assert r.json()["message"]["attachment"]["kind"] == "image"
+
+
+# --- #191 : suppression, messages privés, link preview ----------------------
+
+class TestDelete:
+    def test_author_deletes_own_post(self, client, test_vault_dir):
+        msg = client.post("/api/chat", json={"text": "a supprimer"}).json()["message"]
+        r = client.delete(f"/api/chat/{msg['id']}")
+        assert r.status_code == 200
+        assert client.get("/api/chat").json()["messages"] == []
+
+    def test_delete_unknown_404(self, client, test_vault_dir):
+        assert client.delete("/api/chat/nope").status_code == 404
+
+    def test_removed_message_cannot_be_deleted_twice(self, client, test_vault_dir):
+        msg = client.post("/api/chat", json={"text": "x"}).json()["message"]
+        client.delete(f"/api/chat/{msg['id']}")
+        assert client.delete(f"/api/chat/{msg['id']}").status_code == 404
+
+
+class TestPrivateChat:
+    """DM flows need a real logged-in identity (auth enabled)."""
+
+    def test_dm_roundtrip(self, admin_client, test_vault_dir):
+        h = _login(admin_client)
+        r = admin_client.post("/api/chat/dm/normaluser", json={"text": "salut"}, headers=h)
+        assert r.status_code == 200
+        assert r.json()["message"]["text"] == "salut"
+
+    def test_dm_unknown_user_404(self, admin_client, test_vault_dir):
+        h = _login(admin_client)
+        r = admin_client.post("/api/chat/dm/ghost", json={"text": "hi"}, headers=h)
+        assert r.status_code == 404
+
+    def test_dm_to_self_400(self, admin_client, test_vault_dir):
+        h = _login(admin_client)
+        r = admin_client.post("/api/chat/dm/admin", json={"text": "hi"}, headers=h)
+        assert r.status_code == 400
+
+    def test_dm_isolated_from_general(self, admin_client, test_vault_dir):
+        h = _login(admin_client)
+        admin_client.post("/api/chat", json={"text": "public"}, headers=h)
+        admin_client.post("/api/chat/dm/normaluser", json={"text": "prive"}, headers=h)
+        gen = admin_client.get("/api/chat", headers=h).json()["messages"]
+        assert [m["text"] for m in gen] == ["public"]
+        dm = admin_client.get("/api/chat/dm/normaluser", headers=h).json()["messages"]
+        assert [m["text"] for m in dm] == ["prive"]
+
+    def test_dm_history(self, admin_client, test_vault_dir):
+        h = _login(admin_client)
+        admin_client.post("/api/chat/dm/normaluser", json={"text": "hystorique"}, headers=h)
+        r = admin_client.get("/api/chat/dm/normaluser", headers=h)
+        assert [m["text"] for m in r.json()["messages"]] == ["hystorique"]
+
+    def test_dm_pair_is_shared_not_duplicated(self, admin_client, test_vault_dir):
+        h = _login(admin_client)
+        admin_client.post("/api/chat/dm/normaluser", json={"text": "a"}, headers=h)
+        assert _store.dm_path("admin", "normaluser") == _store.dm_path("normaluser", "admin")
+        assert len(admin_client.get("/api/chat/dm/normaluser", headers=h).json()["messages"]) == 1
+
+    def test_dm_delete(self, admin_client, test_vault_dir):
+        h = _login(admin_client)
+        msg = admin_client.post(
+            "/api/chat/dm/normaluser", json={"text": "adieu"}, headers=h
+        ).json()["message"]
+        r = admin_client.delete(f"/api/chat/dm/normaluser/{msg['id']}", headers=h)
+        assert r.status_code == 200
+        assert admin_client.get("/api/chat/dm/normaluser", headers=h).json()["messages"] == []
+
+    def test_requires_auth(self, admin_client, test_vault_dir):
+        assert admin_client.get("/api/chat/dm/normaluser").status_code == 401
+        assert admin_client.get("/api/chat/users").status_code == 401
+
+    def test_user_list_for_picker(self, admin_client, test_vault_dir):
+        h = _login(admin_client)
+        r = admin_client.get("/api/chat/users", headers=h)
+        assert r.status_code == 200
+        names = [u["username"] for u in r.json()]
+        assert "normaluser" in names
+        assert "admin" not in names  # oneself is not a DM target
+        assert all("password" not in u and "hash" not in str(u) for u in r.json())
+
+
+class TestLinkPreview:
+    def test_no_url_no_preview(self, client, test_vault_dir, monkeypatch):
+        monkeypatch.setattr(_store, "build_preview", lambda text: None)
+        msg = client.post("/api/chat", json={"text": "pas d url"}).json()["message"]
+        # the schema always serialises the key (null) — it must stay falsy
+        assert not msg.get("preview")
+
+    def test_preview_attached_when_fetched(self, client, test_vault_dir, monkeypatch):
+        monkeypatch.setattr(
+            _store, "build_preview",
+            lambda text: {"url": "https://x.test", "title": "Titre", "description": "", "image": "", "site": "x.test"},
+        )
+        msg = client.post("/api/chat", json={"text": "voir https://x.test"}).json()["message"]
+        assert msg["preview"]["title"] == "Titre"
+
+    def test_preview_persisted_in_history(self, client, test_vault_dir, monkeypatch):
+        monkeypatch.setattr(
+            _store, "build_preview",
+            lambda text: {"url": "https://y.test", "title": "Y", "description": "", "image": "", "site": "y.test"},
+        )
+        client.post("/api/chat", json={"text": "https://y.test"})
+        got = client.get("/api/chat").json()["messages"]
+        assert got[-1]["preview"]["site"] == "y.test"
+
+    def test_build_preview_rejects_non_http(self):
+        assert _store.build_preview("javascript:alert(1)") is None
+        assert _store.build_preview("aucune URL") is None
+
+    def test_build_preview_blocks_private_hosts(self, monkeypatch):
+        # SSRF guard rejects loopback before any network round-trip
+        monkeypatch.setattr(_store, "_PREVIEW_CACHE", {})
+        assert _store.build_preview("http://127.0.0.1/x") is None
+
+    def test_build_preview_happy_path_parses_og(self, monkeypatch):
+        """The fetch itself (a bad kwarg here used to fail silently)."""
+        monkeypatch.setattr(_store, "_PREVIEW_CACHE", {})
+        # the SSRF guard resolves DNS for real — out of scope for this test
+        from backend.tools import web as _web
+
+        monkeypatch.setattr(_web, "_assert_public_http_url", lambda url: None)
+
+        class _Resp:
+            status_code = 200
+            text = (
+                "<html><head><title>Fallback</title>"
+                '<meta property="og:title" content="Titre OG">'
+                '<meta property="og:description" content="Desc">'
+                '<meta property="og:site_name" content="Site">'
+                "</head></html>"
+            )
+
+        called = {}
+
+        def _fake_get(url, **kw):
+            called["url"] = url
+            return _Resp()
+
+        monkeypatch.setattr(_store.httpx, "get", _fake_get)
+        preview = _store.build_preview("voir https://example.test/page")
+        assert called["url"] == "https://example.test/page"
+        assert preview == {
+            "url": "https://example.test/page",
+            "title": "Titre OG",
+            "description": "Desc",
+            "image": "",
+            "site": "Site",
+        }