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2026-03-21 09:52:44 -04:00 · 2026-03-21 09:52:44 -04:00 · e76e9ea962
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--- a/.dockerignore
+++ b/.dockerignore
@ -0,0 +1,12 @@
+__pycache__/
+*.pyc
+*.pyo
+.env
+test_vault/
+.venv/
+venv/
+.git/
+.gitignore
+README.md
+build.sh
+docker-compose.yml
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,10 @@
+__pycache__/
+*.pyc
+*.pyo
+.env
+test_vault/
+.venv/
+venv/
+*.egg-info/
+dist/
+build/
--- a/16
+++ b/16
@ -0,0 +1,16 @@
+# ObsiGate — Multi-platform Docker image
+FROM python:3.11-alpine AS base
+
+RUN apk add --no-cache gcc musl-dev libffi-dev
+
+WORKDIR /app
+
+COPY backend/requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY backend/ ./backend/
+COPY frontend/ ./frontend/
+
+EXPOSE 8080
+
+CMD ["uvicorn", "backend.main:app", "--host", "0.0.0.0", "--port", "8080"]
--- a/README.md
+++ b/README.md
@ -0,0 +1,133 @@
+# ObsiGate
+
+**Visionneur multi-vault Obsidian ultra-léger** — naviguez, recherchez et lisez vos notes Obsidian depuis n'importe quel appareil via une interface web moderne.
+
+```
+┌─────────────────────────────────────────────────────────┐
+│  [🔍 Recherche...]          [☀/🌙 Thème]   ObsiGate    │
+├──────────────┬──────────────────────────────────────────┤
+│  SIDEBAR     │           CONTENT AREA                   │
+│  ▼ Recettes  │   📄 Titre du fichier                    │
+│    📁 Soupes │   Tags: #recette #rapide                 │
+│    📄 Pizza  │   [Contenu Markdown rendu]               │
+│  ▼ IT        │                                          │
+│    📁 Docker │                                          │
+│  Tags Cloud  │                                          │
+└──────────────┴──────────────────────────────────────────┘
+```
+
+---
+
+## Fonctionnalités
+
+- **Multi-vault** : visualisez plusieurs vaults Obsidian simultanément
+- **Navigation arborescente** : parcourez vos dossiers et fichiers dans la sidebar
+- **Recherche fulltext** : recherche instantanée dans le contenu et les titres
+- **Tag cloud** : filtrage par tags extraits des frontmatters YAML
+- **Wikilinks** : les `[[liens internes]]` Obsidian sont cliquables
+- **Syntax highlight** : coloration syntaxique des blocs de code
+- **Thème clair/sombre** : toggle persisté en localStorage
+- **Docker multi-platform** : linux/amd64, linux/arm64, linux/arm/v7, linux/386
+- **Lecture seule** : aucune écriture sur vos vaults
+
+---
+
+## Prérequis
+
+- **Docker** >= 20.10
+- **docker-compose** >= 2.0
+
+---
+
+## Déploiement rapide
+
+```bash
+# 1. Build l'image
+docker build -t obsigate:latest .
+
+# 2. Adaptez les volumes dans docker-compose.yml
+
+# 3. Lancez
+docker-compose up -d
+```
+
+L'interface est accessible sur **http://localhost:8080**
+
+---
+
+## Variables d'environnement
+
+Les vaults sont configurées par paires de variables `VAULT_N_NAME` / `VAULT_N_PATH` (N = 1, 2, 3…) :
+
+| Variable | Description | Exemple |
+|----------|-------------|---------|
+| `VAULT_1_NAME` | Nom affiché de la vault | `Recettes` |
+| `VAULT_1_PATH` | Chemin dans le conteneur | `/vaults/Obsidian-RECETTES` |
+| `VAULT_2_NAME` | Nom affiché de la vault | `IT` |
+| `VAULT_2_PATH` | Chemin dans le conteneur | `/vaults/Obsidian_IT` |
+
+Ajoutez autant de paires `VAULT_N_*` que nécessaire.
+
+---
+
+## Ajouter une nouvelle vault
+
+1. Ajoutez un volume dans `docker-compose.yml` :
+   ```yaml
+   - /chemin/local/vers/vault:/vaults/MaVault:ro
+   ```
+
+2. Ajoutez les variables d'environnement :
+   ```yaml
+   - VAULT_6_NAME=MaVault
+   - VAULT_6_PATH=/vaults/MaVault
+   ```
+
+3. Redémarrez :
+   ```bash
+   docker-compose up -d
+   ```
+
+---
+
+## Build multi-platform
+
+```bash
+chmod +x build.sh
+./build.sh
+```
+
+Cela utilise `docker buildx` pour compiler l'image pour :
+- `linux/amd64` (PC, serveurs)
+- `linux/arm64` (Raspberry Pi 4, Apple Silicon)
+- `linux/arm/v7` (Raspberry Pi 3)
+- `linux/386` (Intel Atom i686)
+
+> **Note** : `--load` ne fonctionne qu'en single-platform. Pour du multi-platform, utilisez `--push` vers un registry.
+
+---
+
+## Stack technique
+
+- **Backend** : Python 3.11 + FastAPI + Uvicorn
+- **Frontend** : Vanilla JS + HTML + CSS (zéro framework, zéro build)
+- **Rendu Markdown** : mistune 3.x
+- **Image Docker** : python:3.11-alpine (~150MB)
+- **Pas de base de données** : index en mémoire uniquement
+
+---
+
+## API
+
+| Endpoint | Description |
+|----------|-------------|
+| `GET /api/vaults` | Liste des vaults configurées |
+| `GET /api/browse/{vault}?path=` | Navigation dans les dossiers |
+| `GET /api/file/{vault}?path=` | Contenu rendu d'un fichier .md |
+| `GET /api/search?q=&vault=&tag=` | Recherche fulltext |
+| `GET /api/tags?vault=` | Tags uniques avec compteurs |
+| `GET /api/index/reload` | Force un re-scan des vaults |
+
+---
+
+*Projet : ObsiGate | Auteur : Bruno Beloeil | Licence : MIT*
--- a/backend/init.py
+++ b/backend/init.py
--- a/backend/indexer.py
+++ b/backend/indexer.py
@ -0,0 +1,166 @@
+import os
+import asyncio
+import logging
+from pathlib import Path
+from datetime import datetime, timezone
+from typing import Dict, List, Optional, Any
+
+import frontmatter
+
+logger = logging.getLogger("obsigate.indexer")
+
+# Global in-memory index
+index: Dict[str, Dict[str, Any]] = {}
+
+# Vault config: {name: path}
+vault_config: Dict[str, str] = {}
+
+
+def load_vault_config() -> Dict[str, str]:
+    """Read VAULT_N_NAME / VAULT_N_PATH env vars and return {name: path}."""
+    vaults: Dict[str, str] = {}
+    n = 1
+    while True:
+        name = os.environ.get(f"VAULT_{n}_NAME")
+        path = os.environ.get(f"VAULT_{n}_PATH")
+        if not name or not path:
+            break
+        vaults[name] = path
+        n += 1
+    return vaults
+
+
+def _extract_tags(post: frontmatter.Post) -> List[str]:
+    """Extract tags from frontmatter metadata."""
+    tags = post.metadata.get("tags", [])
+    if isinstance(tags, str):
+        tags = [t.strip().lstrip("#") for t in tags.split(",") if t.strip()]
+    elif isinstance(tags, list):
+        tags = [str(t).strip().lstrip("#") for t in tags]
+    else:
+        tags = []
+    return tags
+
+
+def _extract_title(post: frontmatter.Post, filepath: Path) -> str:
+    """Extract title from frontmatter or derive from filename."""
+    title = post.metadata.get("title", "")
+    if not title:
+        title = filepath.stem.replace("-", " ").replace("_", " ")
+    return str(title)
+
+
+def _scan_vault(vault_name: str, vault_path: str) -> Dict[str, Any]:
+    """Synchronously scan a single vault directory."""
+    vault_root = Path(vault_path)
+    files: List[Dict[str, Any]] = []
+    tag_counts: Dict[str, int] = {}
+
+    if not vault_root.exists():
+        logger.warning(f"Vault path does not exist: {vault_path}")
+        return {"files": [], "tags": {}, "path": vault_path}
+
+    for md_file in vault_root.rglob("*.md"):
+        try:
+            relative = md_file.relative_to(vault_root)
+            stat = md_file.stat()
+            modified = datetime.fromtimestamp(stat.st_mtime, tz=timezone.utc).isoformat()
+
+            raw = md_file.read_text(encoding="utf-8", errors="replace")
+            post = frontmatter.loads(raw)
+
+            tags = _extract_tags(post)
+            title = _extract_title(post, md_file)
+            content_preview = post.content[:200].strip()
+
+            files.append({
+                "path": str(relative).replace("\\", "/"),
+                "title": title,
+                "tags": tags,
+                "content_preview": content_preview,
+                "size": stat.st_size,
+                "modified": modified,
+            })
+
+            for tag in tags:
+                tag_counts[tag] = tag_counts.get(tag, 0) + 1
+
+        except Exception as e:
+            logger.error(f"Error indexing {md_file}: {e}")
+            continue
+
+    logger.info(f"Vault '{vault_name}': indexed {len(files)} files, {len(tag_counts)} unique tags")
+    return {"files": files, "tags": tag_counts, "path": vault_path}
+
+
+async def build_index() -> None:
+    """Build the full in-memory index for all configured vaults."""
+    global index, vault_config
+    vault_config = load_vault_config()
+
+    if not vault_config:
+        logger.warning("No vaults configured. Set VAULT_N_NAME / VAULT_N_PATH env vars.")
+        return
+
+    loop = asyncio.get_event_loop()
+    new_index: Dict[str, Dict[str, Any]] = {}
+
+    tasks = []
+    for name, path in vault_config.items():
+        tasks.append((name, loop.run_in_executor(None, _scan_vault, name, path)))
+
+    for name, task in tasks:
+        new_index[name] = await task
+
+    index.clear()
+    index.update(new_index)
+    total_files = sum(len(v["files"]) for v in index.values())
+    logger.info(f"Index built: {len(index)} vaults, {total_files} total files")
+
+
+async def reload_index() -> Dict[str, Any]:
+    """Force a full re-index and return stats."""
+    await build_index()
+    stats = {}
+    for name, data in index.items():
+        stats[name] = {"file_count": len(data["files"]), "tag_count": len(data["tags"])}
+    return stats
+
+
+def get_vault_names() -> List[str]:
+    return list(index.keys())
+
+
+def get_vault_data(vault_name: str) -> Optional[Dict[str, Any]]:
+    return index.get(vault_name)
+
+
+def find_file_in_index(link_target: str, current_vault: str) -> Optional[Dict[str, str]]:
+    """Find a file matching a wikilink target. Search current vault first, then all."""
+    target_lower = link_target.lower().strip()
+    if not target_lower.endswith(".md"):
+        target_lower += ".md"
+
+    def _search_vault(vname: str, vdata: Dict[str, Any]):
+        for f in vdata["files"]:
+            fpath = f["path"].lower()
+            fname = fpath.rsplit("/", 1)[-1]
+            if fname == target_lower or fpath == target_lower:
+                return {"vault": vname, "path": f["path"]}
+        return None
+
+    # Search current vault first
+    if current_vault in index:
+        result = _search_vault(current_vault, index[current_vault])
+        if result:
+            return result
+
+    # Search all other vaults
+    for vname, vdata in index.items():
+        if vname == current_vault:
+            continue
+        result = _search_vault(vname, vdata)
+        if result:
+            return result
+
+    return None
--- a/backend/main.py
+++ b/backend/main.py
@ -0,0 +1,213 @@
+import re
+import logging
+from pathlib import Path
+from typing import Optional
+
+import frontmatter
+import mistune
+from fastapi import FastAPI, HTTPException, Query
+from fastapi.staticfiles import StaticFiles
+from fastapi.responses import HTMLResponse, JSONResponse
+
+from backend.indexer import (
+    build_index,
+    reload_index,
+    index,
+    get_vault_data,
+    find_file_in_index,
+)
+from backend.search import search, get_all_tags
+
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s [%(name)s] %(levelname)s: %(message)s",
+)
+logger = logging.getLogger("obsigate")
+
+app = FastAPI(title="ObsiGate", version="1.0.0")
+
+# Resolve frontend path relative to this file
+FRONTEND_DIR = Path(__file__).resolve().parent.parent / "frontend"
+
+
+# ---------------------------------------------------------------------------
+# Startup
+# ---------------------------------------------------------------------------
+
+@app.on_event("startup")
+async def startup_event():
+    logger.info("ObsiGate starting — building index...")
+    await build_index()
+    logger.info("ObsiGate ready.")
+
+
+# ---------------------------------------------------------------------------
+# Markdown rendering helpers
+# ---------------------------------------------------------------------------
+
+def _convert_wikilinks(content: str, current_vault: str) -> str:
+    """Convert [[wikilinks]] and [[target|display]] to HTML links."""
+    def _replace(match):
+        target = match.group(1).strip()
+        display = match.group(2).strip() if match.group(2) else target
+        found = find_file_in_index(target, current_vault)
+        if found:
+            return (
+                f'<a class="wikilink" href="#" '
+                f'data-vault="{found["vault"]}" '
+                f'data-path="{found["path"]}">{display}</a>'
+            )
+        return f'<span class="wikilink-missing">{display}</span>'
+
+    pattern = r'\[\[([^\]|]+)(?:\|([^\]]+))?\]\]'
+    return re.sub(pattern, _replace, content)
+
+
+def _render_markdown(raw_md: str, vault_name: str) -> str:
+    """Render markdown string to HTML with wikilink support."""
+    converted = _convert_wikilinks(raw_md, vault_name)
+    md = mistune.create_markdown(
+        escape=False,
+        plugins=["table", "strikethrough", "footnotes", "task_lists"],
+    )
+    return md(converted)
+
+
+# ---------------------------------------------------------------------------
+# API Endpoints
+# ---------------------------------------------------------------------------
+
+@app.get("/api/vaults")
+async def api_vaults():
+    """List configured vaults with file counts."""
+    result = []
+    for name, data in index.items():
+        result.append({
+            "name": name,
+            "file_count": len(data["files"]),
+            "tag_count": len(data["tags"]),
+        })
+    return result
+
+
+@app.get("/api/browse/{vault_name}")
+async def api_browse(vault_name: str, path: str = ""):
+    """Browse directories and files in a vault at a given path level."""
+    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"])
+    target = vault_root / path if path else vault_root
+
+    if not target.exists():
+        raise HTTPException(status_code=404, detail=f"Path not found: {path}")
+
+    items = []
+    try:
+        for entry in sorted(target.iterdir(), key=lambda e: (not e.is_dir(), e.name.lower())):
+            # Skip hidden files/dirs
+            if entry.name.startswith("."):
+                continue
+            rel = str(entry.relative_to(vault_root)).replace("\\", "/")
+            if entry.is_dir():
+                # Count .md files recursively
+                md_count = sum(1 for _ in entry.rglob("*.md"))
+                items.append({
+                    "name": entry.name,
+                    "path": rel,
+                    "type": "directory",
+                    "children_count": md_count,
+                })
+            elif entry.suffix.lower() == ".md":
+                items.append({
+                    "name": entry.name,
+                    "path": rel,
+                    "type": "file",
+                    "size": entry.stat().st_size,
+                })
+    except PermissionError:
+        raise HTTPException(status_code=403, detail="Permission denied")
+
+    return {"vault": vault_name, "path": path, "items": items}
+
+
+@app.get("/api/file/{vault_name}")
+async def api_file(vault_name: str, path: str = Query(..., description="Relative path to .md file")):
+    """Return rendered HTML + metadata for a markdown file."""
+    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 = 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}")
+
+    raw = file_path.read_text(encoding="utf-8", errors="replace")
+    post = frontmatter.loads(raw)
+
+    # Extract metadata
+    tags = post.metadata.get("tags", [])
+    if isinstance(tags, str):
+        tags = [t.strip().lstrip("#") for t in tags.split(",") if t.strip()]
+    elif isinstance(tags, list):
+        tags = [str(t).strip().lstrip("#") for t in tags]
+    else:
+        tags = []
+
+    title = post.metadata.get("title", file_path.stem.replace("-", " ").replace("_", " "))
+
+    html_content = _render_markdown(post.content, vault_name)
+
+    return {
+        "vault": vault_name,
+        "path": path,
+        "title": str(title),
+        "tags": tags,
+        "frontmatter": dict(post.metadata) if post.metadata else {},
+        "html": html_content,
+        "raw_length": len(raw),
+    }
+
+
+@app.get("/api/search")
+async def api_search(
+    q: str = Query("", description="Search query"),
+    vault: str = Query("all", description="Vault filter"),
+    tag: Optional[str] = Query(None, description="Tag filter"),
+):
+    """Full-text search across vaults."""
+    results = search(q, vault_filter=vault, tag_filter=tag)
+    return {"query": q, "vault_filter": vault, "tag_filter": tag, "count": len(results), "results": results}
+
+
+@app.get("/api/tags")
+async def api_tags(vault: Optional[str] = Query(None, description="Vault filter")):
+    """Return all unique tags with counts."""
+    tags = get_all_tags(vault_filter=vault)
+    return {"vault_filter": vault, "tags": tags}
+
+
+@app.get("/api/index/reload")
+async def api_reload():
+    """Force a re-index of all vaults."""
+    stats = await reload_index()
+    return {"status": "ok", "vaults": stats}
+
+
+# ---------------------------------------------------------------------------
+# Static files & SPA fallback
+# ---------------------------------------------------------------------------
+
+if FRONTEND_DIR.exists():
+    app.mount("/static", StaticFiles(directory=str(FRONTEND_DIR)), name="static")
+
+    @app.get("/{full_path:path}")
+    async def serve_spa(full_path: str):
+        """Serve the SPA index.html for all non-API routes."""
+        index_file = FRONTEND_DIR / "index.html"
+        if index_file.exists():
+            return HTMLResponse(content=index_file.read_text(encoding="utf-8"))
+        raise HTTPException(status_code=404, detail="Frontend not found")
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@ -0,0 +1,6 @@
+fastapi==0.111.0
+uvicorn[standard]==0.30.0
+python-frontmatter==1.1.0
+mistune==3.0.2
+python-multipart==0.0.9
+aiofiles==23.2.1
--- a/backend/search.py
+++ b/backend/search.py
@ -0,0 +1,109 @@
+import re
+import logging
+from pathlib import Path
+from typing import List, Dict, Any, Optional
+
+from backend.indexer import index, get_vault_data
+
+logger = logging.getLogger("obsigate.search")
+
+
+def _read_file_content(vault_name: str, file_path: str) -> str:
+    """Read raw markdown content of a file from disk."""
+    vault_data = get_vault_data(vault_name)
+    if not vault_data:
+        return ""
+    vault_root = Path(vault_data["path"])
+    full_path = vault_root / file_path
+    try:
+        return full_path.read_text(encoding="utf-8", errors="replace")
+    except Exception:
+        return ""
+
+
+def _extract_snippet(content: str, query: str, context_chars: int = 120) -> str:
+    """Extract a text snippet around the first occurrence of query."""
+    lower_content = content.lower()
+    lower_query = query.lower()
+    pos = lower_content.find(lower_query)
+    if pos == -1:
+        return content[:200].strip()
+
+    start = max(0, pos - context_chars)
+    end = min(len(content), pos + len(query) + context_chars)
+    snippet = content[start:end].strip()
+
+    if start > 0:
+        snippet = "..." + snippet
+    if end < len(content):
+        snippet = snippet + "..."
+
+    return snippet
+
+
+def search(
+    query: str,
+    vault_filter: str = "all",
+    tag_filter: Optional[str] = None,
+) -> List[Dict[str, Any]]:
+    """
+    Full-text search across indexed vaults.
+    Returns scored results with snippets.
+    """
+    query = query.strip() if query else ""
+    has_query = len(query) > 0
+
+    if not has_query and not tag_filter:
+        return []
+
+    results: List[Dict[str, Any]] = []
+
+    for vault_name, vault_data in index.items():
+        if vault_filter != "all" and vault_name != vault_filter:
+            continue
+
+        for file_info in vault_data["files"]:
+            if tag_filter and tag_filter not in file_info["tags"]:
+                continue
+
+            score = 0
+            snippet = file_info.get("content_preview", "")
+
+            if has_query:
+                # Title match (high weight)
+                if query.lower() in file_info["title"].lower():
+                    score += 10
+
+                # Content match
+                content = _read_file_content(vault_name, file_info["path"])
+                if query.lower() in content.lower():
+                    score += 1
+                    snippet = _extract_snippet(content, query)
+            else:
+                # Tag-only filter: all matching files get score 1
+                score = 1
+
+            if score > 0:
+                results.append({
+                    "vault": vault_name,
+                    "path": file_info["path"],
+                    "title": file_info["title"],
+                    "tags": file_info["tags"],
+                    "score": score,
+                    "snippet": snippet,
+                    "modified": file_info["modified"],
+                })
+
+    results.sort(key=lambda x: -x["score"])
+    return results
+
+
+def get_all_tags(vault_filter: Optional[str] = None) -> Dict[str, int]:
+    """Aggregate tag counts across vaults."""
+    merged: Dict[str, int] = {}
+    for vault_name, vault_data in index.items():
+        if vault_filter and vault_name != vault_filter:
+            continue
+        for tag, count in vault_data.get("tags", {}).items():
+            merged[tag] = merged.get(tag, 0) + count
+    return dict(sorted(merged.items(), key=lambda x: -x[1]))
--- a/build.sh
+++ b/build.sh
@ -0,0 +1,25 @@
+#!/bin/bash
+# Build multi-platform ObsiGate Docker image
+set -e
+
+echo "=== ObsiGate Multi-Platform Build ==="
+
+docker buildx create --use --name obsigate-builder 2>/dev/null || true
+
+# Build for all target platforms
+# Note: --load only works for single platform; use --push for multi-platform registry push.
+# For local testing, build one platform at a time:
+#   docker buildx build --platform linux/amd64 --load -t obsigate:latest .
+
+docker buildx build \
+  --platform linux/amd64,linux/arm64,linux/arm/v7,linux/386 \
+  --tag obsigate:latest \
+  --tag obsigate:1.0.0 \
+  .
+
+echo ""
+echo "Build terminé."
+echo "Pour un push vers un registry : ajoutez --push au build."
+echo "Pour un test local (amd64) :"
+echo "  docker buildx build --platform linux/amd64 --load -t obsigate:latest ."
+echo "  docker-compose up -d"
--- a/docker-compose.yml
+++ b/docker-compose.yml
@ -0,0 +1,26 @@
+version: "3.9"
+
+services:
+  obsigate:
+    image: obsigate:latest
+    container_name: obsigate
+    restart: unless-stopped
+    ports:
+      - "8080:8080"
+    volumes:
+      - /NFS/OBSIDIAN_DOC/Obsidian-RECETTES:/vaults/Obsidian-RECETTES:ro
+      - /NFS/OBSIDIAN_DOC/Obsidian_IT:/vaults/Obsidian_IT:ro
+      - /NFS/OBSIDIAN_DOC/Obsidian_MAIN:/vaults/Obsidian_MAIN:ro
+      - /NFS/OBSIDIAN_DOC/Obsidian_WORKOUT:/vaults/Obsidian_WORKOUT:ro
+      - /NFS/OBSIDIAN_DOC/SessionsManager:/vaults/SessionsManager:ro
+    environment:
+      - VAULT_1_NAME=Recettes
+      - VAULT_1_PATH=/vaults/Obsidian-RECETTES
+      - VAULT_2_NAME=IT
+      - VAULT_2_PATH=/vaults/Obsidian_IT
+      - VAULT_3_NAME=Main
+      - VAULT_3_PATH=/vaults/Obsidian_MAIN
+      - VAULT_4_NAME=Workout
+      - VAULT_4_PATH=/vaults/Obsidian_WORKOUT
+      - VAULT_5_NAME=Sessions
+      - VAULT_5_PATH=/vaults/SessionsManager
--- a/frontend/app.js
+++ b/frontend/app.js
@ -0,0 +1,444 @@
+/* ObsiGate — Vanilla JS SPA */
+
+(function () {
+  "use strict";
+
+  // ---------------------------------------------------------------------------
+  // State
+  // ---------------------------------------------------------------------------
+  let currentVault = null;
+  let currentPath = null;
+  let searchTimeout = null;
+
+  // ---------------------------------------------------------------------------
+  // Safe CDN helpers
+  // ---------------------------------------------------------------------------
+  function safeCreateIcons() {
+    if (typeof lucide !== "undefined" && lucide.createIcons) {
+      try { lucide.createIcons(); } catch (e) { /* CDN not loaded */ }
+    }
+  }
+
+  function safeHighlight(block) {
+    if (typeof hljs !== "undefined" && hljs.highlightElement) {
+      try { hljs.highlightElement(block); } catch (e) { /* CDN not loaded */ }
+    }
+  }
+
+  // ---------------------------------------------------------------------------
+  // Theme
+  // ---------------------------------------------------------------------------
+  function initTheme() {
+    const saved = localStorage.getItem("obsigate-theme") || "dark";
+    applyTheme(saved);
+  }
+
+  function applyTheme(theme) {
+    document.documentElement.setAttribute("data-theme", theme);
+    localStorage.setItem("obsigate-theme", theme);
+
+    const icon = document.getElementById("theme-icon");
+    if (icon) {
+      icon.setAttribute("data-lucide", theme === "dark" ? "moon" : "sun");
+      safeCreateIcons();
+    }
+
+    // Swap highlight.js theme
+    const darkSheet = document.getElementById("hljs-theme-dark");
+    const lightSheet = document.getElementById("hljs-theme-light");
+    if (darkSheet && lightSheet) {
+      darkSheet.disabled = theme !== "dark";
+      lightSheet.disabled = theme !== "light";
+    }
+  }
+
+  function toggleTheme() {
+    const current = document.documentElement.getAttribute("data-theme");
+    applyTheme(current === "dark" ? "light" : "dark");
+  }
+
+  // ---------------------------------------------------------------------------
+  // API helpers
+  // ---------------------------------------------------------------------------
+  async function api(path) {
+    const res = await fetch(path);
+    if (!res.ok) throw new Error(`API error: ${res.status}`);
+    return res.json();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Sidebar — Vault tree
+  // ---------------------------------------------------------------------------
+  async function loadVaults() {
+    const vaults = await api("/api/vaults");
+    const container = document.getElementById("vault-tree");
+    const filter = document.getElementById("vault-filter");
+    container.innerHTML = "";
+
+    vaults.forEach((v) => {
+      // Sidebar tree entry
+      const vaultItem = el("div", { class: "tree-item vault-item", "data-vault": v.name }, [
+        icon("chevron-right", 14),
+        icon("database", 16),
+        document.createTextNode(` ${v.name} `),
+        smallBadge(v.file_count),
+      ]);
+      vaultItem.addEventListener("click", () => toggleVault(vaultItem, v.name));
+      container.appendChild(vaultItem);
+
+      const childContainer = el("div", { class: "tree-children collapsed", id: `vault-children-${v.name}` });
+      container.appendChild(childContainer);
+
+      // Vault filter dropdown
+      const opt = document.createElement("option");
+      opt.value = v.name;
+      opt.textContent = v.name;
+      filter.appendChild(opt);
+    });
+
+    safeCreateIcons();
+  }
+
+  async function toggleVault(itemEl, vaultName) {
+    const childContainer = document.getElementById(`vault-children-${vaultName}`);
+    if (!childContainer) return;
+
+    if (childContainer.classList.contains("collapsed")) {
+      // Expand — load children if empty
+      if (childContainer.children.length === 0) {
+        await loadDirectory(vaultName, "", childContainer);
+      }
+      childContainer.classList.remove("collapsed");
+      // Swap chevron
+      const chevron = itemEl.querySelector("[data-lucide]");
+      if (chevron) chevron.setAttribute("data-lucide", "chevron-down");
+      safeCreateIcons();
+    } else {
+      childContainer.classList.add("collapsed");
+      const chevron = itemEl.querySelector("[data-lucide]");
+      if (chevron) chevron.setAttribute("data-lucide", "chevron-right");
+      safeCreateIcons();
+    }
+  }
+
+  async function loadDirectory(vaultName, dirPath, container) {
+    const url = `/api/browse/${encodeURIComponent(vaultName)}?path=${encodeURIComponent(dirPath)}`;
+    const data = await api(url);
+    container.innerHTML = "";
+
+    data.items.forEach((item) => {
+      if (item.type === "directory") {
+        const dirItem = el("div", { class: "tree-item", "data-vault": vaultName, "data-path": item.path }, [
+          icon("chevron-right", 14),
+          icon("folder", 16),
+          document.createTextNode(` ${item.name} `),
+          smallBadge(item.children_count),
+        ]);
+        container.appendChild(dirItem);
+
+        const subContainer = el("div", { class: "tree-children collapsed", id: `dir-${vaultName}-${item.path}` });
+        container.appendChild(subContainer);
+
+        dirItem.addEventListener("click", async () => {
+          if (subContainer.classList.contains("collapsed")) {
+            if (subContainer.children.length === 0) {
+              await loadDirectory(vaultName, item.path, subContainer);
+            }
+            subContainer.classList.remove("collapsed");
+            const chev = dirItem.querySelector("[data-lucide]");
+            if (chev) chev.setAttribute("data-lucide", "chevron-down");
+            safeCreateIcons();
+          } else {
+            subContainer.classList.add("collapsed");
+            const chev = dirItem.querySelector("[data-lucide]");
+            if (chev) chev.setAttribute("data-lucide", "chevron-right");
+            safeCreateIcons();
+          }
+        });
+      } else {
+        const fileItem = el("div", { class: "tree-item", "data-vault": vaultName, "data-path": item.path }, [
+          icon("file-text", 16),
+          document.createTextNode(` ${item.name.replace(/\.md$/i, "")}`),
+        ]);
+        fileItem.addEventListener("click", () => openFile(vaultName, item.path));
+        container.appendChild(fileItem);
+      }
+    });
+
+    safeCreateIcons();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Tags
+  // ---------------------------------------------------------------------------
+  async function loadTags() {
+    const data = await api("/api/tags");
+    const cloud = document.getElementById("tag-cloud");
+    cloud.innerHTML = "";
+
+    const tags = data.tags;
+    const counts = Object.values(tags);
+    if (counts.length === 0) return;
+
+    const maxCount = Math.max(...counts);
+    const minSize = 0.7;
+    const maxSize = 1.25;
+
+    Object.entries(tags).forEach(([tag, count]) => {
+      const ratio = maxCount > 1 ? (count - 1) / (maxCount - 1) : 0;
+      const size = minSize + ratio * (maxSize - minSize);
+      const tagEl = el("span", { class: "tag-item", style: `font-size:${size}rem` }, [
+        document.createTextNode(`#${tag}`),
+      ]);
+      tagEl.addEventListener("click", () => searchByTag(tag));
+      cloud.appendChild(tagEl);
+    });
+  }
+
+  function searchByTag(tag) {
+    const input = document.getElementById("search-input");
+    input.value = "";
+    performSearch("", "all", tag);
+  }
+
+  // ---------------------------------------------------------------------------
+  // File viewer
+  // ---------------------------------------------------------------------------
+  async function openFile(vaultName, filePath) {
+    currentVault = vaultName;
+    currentPath = filePath;
+
+    // Highlight active
+    document.querySelectorAll(".tree-item.active").forEach((el) => el.classList.remove("active"));
+    const selector = `.tree-item[data-vault="${vaultName}"][data-path="${filePath}"]`;
+    const active = document.querySelector(selector);
+    if (active) active.classList.add("active");
+
+    const url = `/api/file/${encodeURIComponent(vaultName)}?path=${encodeURIComponent(filePath)}`;
+    const data = await api(url);
+    renderFile(data);
+  }
+
+  function renderFile(data) {
+    const area = document.getElementById("content-area");
+
+    // Breadcrumb
+    const parts = data.path.split("/");
+    const breadcrumbEls = [];
+    breadcrumbEls.push(makeBreadcrumbSpan(data.vault, () => {}));
+    let accumulated = "";
+    parts.forEach((part, i) => {
+      breadcrumbEls.push(el("span", { class: "sep" }, [document.createTextNode(" / ")]));
+      accumulated += (accumulated ? "/" : "") + part;
+      const p = accumulated;
+      if (i < parts.length - 1) {
+        breadcrumbEls.push(makeBreadcrumbSpan(part, () => {}));
+      } else {
+        breadcrumbEls.push(el("span", {}, [document.createTextNode(part.replace(/\.md$/i, ""))]));
+      }
+    });
+
+    const breadcrumb = el("div", { class: "breadcrumb" }, breadcrumbEls);
+
+    // Tags
+    const tagsDiv = el("div", { class: "file-tags" });
+    (data.tags || []).forEach((tag) => {
+      const t = el("span", { class: "file-tag" }, [document.createTextNode(`#${tag}`)]);
+      t.addEventListener("click", () => searchByTag(tag));
+      tagsDiv.appendChild(t);
+    });
+
+    // Copy path button
+    const copyBtn = el("button", { class: "btn-copy-path" }, [document.createTextNode("Copier le chemin")]);
+    copyBtn.addEventListener("click", () => {
+      navigator.clipboard.writeText(`${data.vault}/${data.path}`).then(() => {
+        copyBtn.textContent = "Copié !";
+        setTimeout(() => (copyBtn.textContent = "Copier le chemin"), 1500);
+      });
+    });
+
+    // Frontmatter
+    let fmSection = null;
+    if (data.frontmatter && Object.keys(data.frontmatter).length > 0) {
+      const fmToggle = el("div", { class: "frontmatter-toggle" }, [
+        document.createTextNode("▶ Frontmatter"),
+      ]);
+      const fmContent = el("div", { class: "frontmatter-content" }, [
+        document.createTextNode(JSON.stringify(data.frontmatter, null, 2)),
+      ]);
+      fmToggle.addEventListener("click", () => {
+        fmContent.classList.toggle("open");
+        fmToggle.textContent = fmContent.classList.contains("open") ? "▼ Frontmatter" : "▶ Frontmatter";
+      });
+      fmSection = el("div", {}, [fmToggle, fmContent]);
+    }
+
+    // Markdown content
+    const mdDiv = el("div", { class: "md-content" });
+    mdDiv.innerHTML = data.html;
+
+    // Assemble
+    area.innerHTML = "";
+    area.appendChild(breadcrumb);
+    area.appendChild(el("div", { class: "file-header" }, [
+      el("div", { class: "file-title" }, [document.createTextNode(data.title)]),
+      tagsDiv,
+      el("div", { class: "file-actions" }, [copyBtn]),
+    ]));
+    if (fmSection) area.appendChild(fmSection);
+    area.appendChild(mdDiv);
+
+    // Highlight code blocks
+    area.querySelectorAll("pre code").forEach((block) => {
+      safeHighlight(block);
+    });
+
+    // Wire up wikilinks
+    area.querySelectorAll(".wikilink").forEach((link) => {
+      link.addEventListener("click", (e) => {
+        e.preventDefault();
+        const v = link.getAttribute("data-vault");
+        const p = link.getAttribute("data-path");
+        if (v && p) openFile(v, p);
+      });
+    });
+
+    area.scrollTop = 0;
+  }
+
+  // ---------------------------------------------------------------------------
+  // Search
+  // ---------------------------------------------------------------------------
+  function initSearch() {
+    const input = document.getElementById("search-input");
+    input.addEventListener("input", () => {
+      clearTimeout(searchTimeout);
+      searchTimeout = setTimeout(() => {
+        const q = input.value.trim();
+        const vault = document.getElementById("vault-filter").value;
+        if (q.length > 0) {
+          performSearch(q, vault, null);
+        } else {
+          showWelcome();
+        }
+      }, 300);
+    });
+  }
+
+  async function performSearch(query, vaultFilter, tagFilter) {
+    let url = `/api/search?q=${encodeURIComponent(query)}&vault=${encodeURIComponent(vaultFilter)}`;
+    if (tagFilter) url += `&tag=${encodeURIComponent(tagFilter)}`;
+
+    const data = await api(url);
+    renderSearchResults(data, query, tagFilter);
+  }
+
+  function renderSearchResults(data, query, tagFilter) {
+    const area = document.getElementById("content-area");
+    area.innerHTML = "";
+
+    const header = el("div", { class: "search-results-header" });
+    if (query) {
+      header.textContent = `${data.count} résultat(s) pour "${query}"`;
+    } else if (tagFilter) {
+      header.textContent = `${data.count} fichier(s) avec le tag #${tagFilter}`;
+    }
+    area.appendChild(header);
+
+    if (data.results.length === 0) {
+      area.appendChild(el("p", { style: "color:var(--text-muted);margin-top:20px" }, [
+        document.createTextNode("Aucun résultat trouvé."),
+      ]));
+      return;
+    }
+
+    const container = el("div", { class: "search-results" });
+    data.results.forEach((r) => {
+      const item = el("div", { class: "search-result-item" }, [
+        el("div", { class: "search-result-title" }, [document.createTextNode(r.title)]),
+        el("div", { class: "search-result-vault" }, [document.createTextNode(r.vault + " / " + r.path)]),
+        el("div", { class: "search-result-snippet" }, [document.createTextNode(r.snippet || "")]),
+      ]);
+
+      if (r.tags && r.tags.length > 0) {
+        const tagsDiv = el("div", { class: "search-result-tags" });
+        r.tags.forEach((tag) => {
+          tagsDiv.appendChild(el("span", { class: "file-tag" }, [document.createTextNode(`#${tag}`)]));
+        });
+        item.appendChild(tagsDiv);
+      }
+
+      item.addEventListener("click", () => openFile(r.vault, r.path));
+      container.appendChild(item);
+    });
+
+    area.appendChild(container);
+  }
+
+  // ---------------------------------------------------------------------------
+  // Helpers
+  // ---------------------------------------------------------------------------
+  function el(tag, attrs, children) {
+    const e = document.createElement(tag);
+    if (attrs) {
+      Object.entries(attrs).forEach(([k, v]) => e.setAttribute(k, v));
+    }
+    if (children) {
+      children.forEach((c) => { if (c) e.appendChild(c); });
+    }
+    return e;
+  }
+
+  function icon(name, size) {
+    const i = document.createElement("i");
+    i.setAttribute("data-lucide", name);
+    i.style.width = size + "px";
+    i.style.height = size + "px";
+    i.classList.add("icon");
+    return i;
+  }
+
+  function smallBadge(count) {
+    const s = document.createElement("span");
+    s.style.cssText = "font-size:0.68rem;color:var(--text-muted);margin-left:4px";
+    s.textContent = `(${count})`;
+    return s;
+  }
+
+  function makeBreadcrumbSpan(text, onClick) {
+    const s = document.createElement("span");
+    s.textContent = text;
+    if (onClick) s.addEventListener("click", onClick);
+    return s;
+  }
+
+  function showWelcome() {
+    const area = document.getElementById("content-area");
+    area.innerHTML = `
+      <div class="welcome">
+        <i data-lucide="library" style="width:48px;height:48px;color:var(--text-muted)"></i>
+        <h2>ObsiGate</h2>
+        <p>Sélectionnez un fichier dans la sidebar ou utilisez la recherche pour commencer.</p>
+      </div>`;
+    safeCreateIcons();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Init
+  // ---------------------------------------------------------------------------
+  async function init() {
+    initTheme();
+    document.getElementById("theme-toggle").addEventListener("click", toggleTheme);
+    initSearch();
+
+    try {
+      await Promise.all([loadVaults(), loadTags()]);
+    } catch (err) {
+      console.error("Failed to initialize ObsiGate:", err);
+    }
+
+    safeCreateIcons();
+  }
+
+  document.addEventListener("DOMContentLoaded", init);
+})();
--- a/frontend/index.html
+++ b/frontend/index.html
@ -0,0 +1,67 @@
+<!DOCTYPE html>
+<html lang="fr" data-theme="dark">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>ObsiGate</title>
+  <link rel="stylesheet" href="/static/style.css">
+  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/github-dark.min.css" id="hljs-theme-dark">
+  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/github.min.css" id="hljs-theme-light" disabled>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js"></script>
+  <script src="https://unpkg.com/lucide@0.344.0/dist/umd/lucide.min.js"></script>
+</head>
+<body>
+  <div class="app-container">
+
+    <!-- Header -->
+    <header class="header">
+      <div class="header-logo">
+        <i data-lucide="book-open" style="width:20px;height:20px"></i>
+        ObsiGate
+      </div>
+
+      <div class="search-wrapper">
+        <i data-lucide="search" class="search-icon" style="width:16px;height:16px"></i>
+        <input type="text" id="search-input" placeholder="Recherche..." autocomplete="off">
+      </div>
+
+      <select id="vault-filter" class="search-vault-filter">
+        <option value="all">Toutes les vaults</option>
+      </select>
+
+      <button class="theme-toggle" id="theme-toggle" title="Changer le thème">
+        <i data-lucide="moon" id="theme-icon" style="width:18px;height:18px"></i>
+      </button>
+    </header>
+
+    <!-- Main -->
+    <div class="main-body">
+
+      <!-- Sidebar -->
+      <aside class="sidebar">
+        <div class="sidebar-tree" id="sidebar-tree">
+          <div class="sidebar-section-title">Vaults</div>
+          <div id="vault-tree"></div>
+        </div>
+
+        <div class="tag-cloud-section">
+          <div class="tag-cloud-title">Tags</div>
+          <div class="tag-cloud" id="tag-cloud"></div>
+        </div>
+      </aside>
+
+      <!-- Content -->
+      <main class="content-area" id="content-area">
+        <div class="welcome" id="welcome">
+          <i data-lucide="library" style="width:48px;height:48px;color:var(--text-muted)"></i>
+          <h2>ObsiGate</h2>
+          <p>Sélectionnez un fichier dans la sidebar ou utilisez la recherche pour commencer.</p>
+        </div>
+      </main>
+
+    </div>
+  </div>
+
+  <script src="/static/app.js"></script>
+</body>
+</html>
--- a/frontend/style.css
+++ b/frontend/style.css
@ -0,0 +1,621 @@
+@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Lora:ital,wght@0,400;0,600;1,400&display=swap');
+
+/* ===== RESET ===== */
+*, *::before, *::after {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+/* ===== THEME — DARK (default) ===== */
+:root[data-theme="dark"] {
+  --bg-primary: #0f1117;
+  --bg-secondary: #161b22;
+  --bg-sidebar: #13161d;
+  --bg-hover: #1f2430;
+  --border: #21262d;
+  --text-primary: #e6edf3;
+  --text-secondary: #8b949e;
+  --text-muted: #484f58;
+  --accent: #58a6ff;
+  --accent-green: #3fb950;
+  --tag-bg: #1f2a3a;
+  --tag-text: #79c0ff;
+  --code-bg: #161b22;
+  --search-bg: #21262d;
+  --scrollbar: #30363d;
+}
+
+/* ===== THEME — LIGHT ===== */
+:root[data-theme="light"] {
+  --bg-primary: #ffffff;
+  --bg-secondary: #f6f8fa;
+  --bg-sidebar: #f0f2f5;
+  --bg-hover: #e8ecf0;
+  --border: #d0d7de;
+  --text-primary: #1f2328;
+  --text-secondary: #57606a;
+  --text-muted: #9198a1;
+  --accent: #0969da;
+  --accent-green: #1a7f37;
+  --tag-bg: #ddf4ff;
+  --tag-text: #0969da;
+  --code-bg: #f6f8fa;
+  --search-bg: #ffffff;
+  --scrollbar: #d0d7de;
+}
+
+/* ===== BASE ===== */
+html {
+  font-size: 16px;
+  scroll-behavior: smooth;
+}
+
+body {
+  font-family: 'Lora', Georgia, serif;
+  background: var(--bg-primary);
+  color: var(--text-primary);
+  line-height: 1.7;
+  transition: background 200ms ease, color 200ms ease;
+  overflow: hidden;
+  height: 100vh;
+}
+
+a {
+  color: var(--accent);
+  text-decoration: none;
+}
+a:hover {
+  text-decoration: underline;
+}
+
+/* ===== LAYOUT ===== */
+.app-container {
+  display: flex;
+  flex-direction: column;
+  height: 100vh;
+}
+
+/* --- Header --- */
+.header {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 10px 20px;
+  background: var(--bg-secondary);
+  border-bottom: 1px solid var(--border);
+  flex-shrink: 0;
+  z-index: 100;
+  transition: background 200ms ease;
+}
+
+.header-logo {
+  font-family: 'JetBrains Mono', monospace;
+  font-weight: 700;
+  font-size: 1.15rem;
+  color: var(--accent);
+  white-space: nowrap;
+  margin-right: auto;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.search-wrapper {
+  flex: 1;
+  max-width: 520px;
+  position: relative;
+}
+
+.search-wrapper input {
+  width: 100%;
+  padding: 8px 14px 8px 38px;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  background: var(--search-bg);
+  color: var(--text-primary);
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.85rem;
+  outline: none;
+  transition: border-color 200ms ease, background 200ms ease;
+}
+.search-wrapper input:focus {
+  border-color: var(--accent);
+}
+.search-wrapper .search-icon {
+  position: absolute;
+  left: 10px;
+  top: 50%;
+  transform: translateY(-50%);
+  color: var(--text-muted);
+  pointer-events: none;
+}
+
+.search-vault-filter {
+  padding: 6px 10px;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  background: var(--search-bg);
+  color: var(--text-primary);
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.8rem;
+  outline: none;
+  cursor: pointer;
+}
+
+.theme-toggle {
+  background: none;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  padding: 6px 10px;
+  cursor: pointer;
+  color: var(--text-secondary);
+  display: flex;
+  align-items: center;
+  transition: color 200ms ease, border-color 200ms ease;
+}
+.theme-toggle:hover {
+  color: var(--accent);
+  border-color: var(--accent);
+}
+
+/* --- Main body --- */
+.main-body {
+  display: flex;
+  flex: 1;
+  overflow: hidden;
+}
+
+/* --- Sidebar --- */
+.sidebar {
+  width: 280px;
+  min-width: 280px;
+  background: var(--bg-sidebar);
+  border-right: 1px solid var(--border);
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+  transition: background 200ms ease;
+}
+
+.sidebar-tree {
+  flex: 1;
+  overflow-y: auto;
+  padding: 12px 0;
+}
+
+.sidebar-tree::-webkit-scrollbar {
+  width: 6px;
+}
+.sidebar-tree::-webkit-scrollbar-thumb {
+  background: var(--scrollbar);
+  border-radius: 3px;
+}
+
+.sidebar-section-title {
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.7rem;
+  font-weight: 700;
+  text-transform: uppercase;
+  letter-spacing: 0.08em;
+  color: var(--text-muted);
+  padding: 8px 16px 4px;
+}
+
+.tree-item {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  padding: 5px 16px;
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.82rem;
+  color: var(--text-secondary);
+  cursor: pointer;
+  border-radius: 0;
+  transition: background 120ms ease, color 120ms ease;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.tree-item:hover {
+  background: var(--bg-hover);
+  color: var(--text-primary);
+}
+.tree-item.active {
+  background: var(--bg-hover);
+  color: var(--accent);
+}
+
+.tree-item .icon {
+  width: 16px;
+  height: 16px;
+  flex-shrink: 0;
+  color: var(--text-muted);
+}
+.tree-item.active .icon {
+  color: var(--accent);
+}
+.tree-item.vault-item .icon {
+  color: var(--accent-green);
+}
+
+.tree-children {
+  padding-left: 16px;
+}
+
+.tree-children.collapsed {
+  display: none;
+}
+
+/* --- Tag Cloud --- */
+.tag-cloud-section {
+  border-top: 1px solid var(--border);
+  padding: 12px 16px;
+  max-height: 180px;
+  overflow-y: auto;
+}
+.tag-cloud-section::-webkit-scrollbar {
+  width: 6px;
+}
+.tag-cloud-section::-webkit-scrollbar-thumb {
+  background: var(--scrollbar);
+  border-radius: 3px;
+}
+
+.tag-cloud-title {
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.7rem;
+  font-weight: 700;
+  text-transform: uppercase;
+  letter-spacing: 0.08em;
+  color: var(--text-muted);
+  margin-bottom: 8px;
+}
+
+.tag-cloud {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+}
+
+.tag-item {
+  display: inline-block;
+  padding: 2px 8px;
+  background: var(--tag-bg);
+  color: var(--tag-text);
+  border-radius: 4px;
+  font-family: 'JetBrains Mono', monospace;
+  cursor: pointer;
+  transition: opacity 150ms ease;
+  line-height: 1.4;
+}
+.tag-item:hover {
+  opacity: 0.8;
+}
+
+/* --- Content Area --- */
+.content-area {
+  flex: 1;
+  overflow-y: auto;
+  padding: 28px 40px 60px;
+  transition: background 200ms ease;
+}
+.content-area::-webkit-scrollbar {
+  width: 8px;
+}
+.content-area::-webkit-scrollbar-thumb {
+  background: var(--scrollbar);
+  border-radius: 4px;
+}
+
+/* Welcome */
+.welcome {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  height: 100%;
+  color: var(--text-muted);
+  text-align: center;
+  gap: 12px;
+}
+.welcome h2 {
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 1.6rem;
+  color: var(--text-secondary);
+}
+.welcome p {
+  font-size: 0.95rem;
+  max-width: 400px;
+}
+
+/* Breadcrumb */
+.breadcrumb {
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.78rem;
+  color: var(--text-muted);
+  margin-bottom: 12px;
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: 4px;
+}
+.breadcrumb span {
+  cursor: pointer;
+  color: var(--text-secondary);
+  transition: color 120ms ease;
+}
+.breadcrumb span:hover {
+  color: var(--accent);
+}
+.breadcrumb .sep {
+  cursor: default;
+  color: var(--text-muted);
+}
+.breadcrumb .sep:hover {
+  color: var(--text-muted);
+}
+
+/* File header */
+.file-header {
+  margin-bottom: 20px;
+}
+.file-title {
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 1.6rem;
+  font-weight: 700;
+  margin-bottom: 8px;
+}
+.file-tags {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+  margin-bottom: 6px;
+}
+.file-tag {
+  display: inline-block;
+  padding: 2px 8px;
+  background: var(--tag-bg);
+  color: var(--tag-text);
+  border-radius: 4px;
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.78rem;
+  cursor: pointer;
+}
+.file-actions {
+  margin-top: 8px;
+}
+.btn-copy-path {
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.75rem;
+  padding: 4px 10px;
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  background: transparent;
+  color: var(--text-secondary);
+  cursor: pointer;
+  transition: color 150ms ease, border-color 150ms ease;
+}
+.btn-copy-path:hover {
+  color: var(--accent);
+  border-color: var(--accent);
+}
+
+/* Frontmatter collapsible */
+.frontmatter-toggle {
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.78rem;
+  color: var(--text-muted);
+  cursor: pointer;
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  margin-bottom: 12px;
+  user-select: none;
+}
+.frontmatter-toggle:hover {
+  color: var(--text-secondary);
+}
+.frontmatter-content {
+  background: var(--code-bg);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  padding: 12px 16px;
+  margin-bottom: 20px;
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.8rem;
+  color: var(--text-secondary);
+  white-space: pre-wrap;
+  display: none;
+}
+.frontmatter-content.open {
+  display: block;
+}
+
+/* --- Markdown Rendered Content --- */
+.md-content h1, .md-content h2, .md-content h3,
+.md-content h4, .md-content h5, .md-content h6 {
+  font-family: 'JetBrains Mono', monospace;
+  font-weight: 700;
+  margin: 1.4em 0 0.5em;
+  color: var(--text-primary);
+}
+.md-content h1 { font-size: 1.5rem; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
+.md-content h2 { font-size: 1.25rem; }
+.md-content h3 { font-size: 1.1rem; }
+
+.md-content p {
+  margin: 0.6em 0;
+}
+
+.md-content ul, .md-content ol {
+  padding-left: 1.6em;
+  margin: 0.5em 0;
+}
+
+.md-content li {
+  margin: 0.25em 0;
+}
+
+.md-content blockquote {
+  border-left: 3px solid var(--accent);
+  padding: 4px 16px;
+  margin: 0.8em 0;
+  color: var(--text-secondary);
+  background: var(--bg-secondary);
+  border-radius: 0 6px 6px 0;
+}
+
+.md-content code {
+  font-family: 'JetBrains Mono', monospace;
+  background: var(--code-bg);
+  padding: 2px 6px;
+  border-radius: 4px;
+  font-size: 0.88em;
+  border: 1px solid var(--border);
+}
+
+.md-content pre {
+  background: var(--code-bg);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  padding: 16px;
+  overflow-x: auto;
+  margin: 0.8em 0;
+}
+.md-content pre code {
+  background: none;
+  border: none;
+  padding: 0;
+  font-size: 0.85rem;
+  line-height: 1.55;
+}
+
+.md-content table {
+  width: 100%;
+  border-collapse: collapse;
+  margin: 0.8em 0;
+  font-size: 0.92rem;
+}
+.md-content th, .md-content td {
+  border: 1px solid var(--border);
+  padding: 8px 12px;
+  text-align: left;
+}
+.md-content th {
+  background: var(--bg-secondary);
+  font-family: 'JetBrains Mono', monospace;
+  font-weight: 600;
+  font-size: 0.85rem;
+}
+
+.md-content img {
+  max-width: 100%;
+  border-radius: 8px;
+  margin: 0.6em 0;
+}
+
+.md-content hr {
+  border: none;
+  border-top: 1px solid var(--border);
+  margin: 1.5em 0;
+}
+
+.md-content .task-list-item {
+  list-style: none;
+  margin-left: -1.2em;
+}
+.md-content .task-list-item input[type="checkbox"] {
+  margin-right: 6px;
+}
+
+/* Wikilinks */
+.wikilink {
+  color: var(--accent);
+  border-bottom: 1px dashed var(--accent);
+  cursor: pointer;
+}
+.wikilink:hover {
+  opacity: 0.8;
+}
+.wikilink-missing {
+  color: var(--text-muted);
+  border-bottom: 1px dashed var(--text-muted);
+  cursor: default;
+}
+
+/* --- Search Results --- */
+.search-results {
+  padding: 0;
+}
+.search-results-header {
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.85rem;
+  color: var(--text-muted);
+  margin-bottom: 16px;
+}
+
+.search-result-item {
+  padding: 14px 16px;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  margin-bottom: 10px;
+  cursor: pointer;
+  transition: background 120ms ease, border-color 120ms ease;
+}
+.search-result-item:hover {
+  background: var(--bg-hover);
+  border-color: var(--accent);
+}
+
+.search-result-title {
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.92rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 4px;
+}
+
+.search-result-vault {
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.72rem;
+  color: var(--accent-green);
+  margin-bottom: 4px;
+}
+
+.search-result-snippet {
+  font-size: 0.85rem;
+  color: var(--text-secondary);
+  line-height: 1.5;
+}
+
+.search-result-tags {
+  margin-top: 6px;
+  display: flex;
+  flex-wrap: wrap;
+  gap: 4px;
+}
+.search-result-tags .file-tag {
+  font-size: 0.7rem;
+  padding: 1px 6px;
+}
+
+/* --- Responsive --- */
+@media (max-width: 768px) {
+  .sidebar {
+    width: 220px;
+    min-width: 220px;
+  }
+  .content-area {
+    padding: 20px;
+  }
+}
+
+@media (max-width: 600px) {
+  .sidebar {
+    display: none;
+  }
+  .content-area {
+    padding: 16px;
+  }
+}