Expand file type support beyond Markdown to include code, config, and build files with syntax highlighting and improved UI filtering

backend/indexer.py

@@ -15,6 +15,18 @@ index: Dict[str, Dict[str, Any]] = {}
 # Vault config: {name: path}
 vault_config: Dict[str, str] = {}
 
+# Supported text-based file extensions
+SUPPORTED_EXTENSIONS = {
+    ".md", ".txt", ".log", ".py", ".js", ".ts", ".jsx", ".tsx",
+    ".sh", ".bash", ".zsh", ".fish", ".bat", ".cmd", ".ps1",
+    ".json", ".yaml", ".yml", ".toml", ".xml", ".csv",
+    ".cfg", ".ini", ".conf", ".env",
+    ".html", ".css", ".scss", ".less",
+    ".java", ".c", ".cpp", ".h", ".hpp", ".cs", ".go", ".rs", ".rb",
+    ".php", ".sql", ".r", ".m", ".swift", ".kt",
+    ".dockerfile", ".makefile", ".cmake",
+}
+
 
 def load_vault_config() -> Dict[str, str]:
     """Read VAULT_N_NAME / VAULT_N_PATH env vars and return {name: path}."""
@@ -60,18 +72,34 @@ def _scan_vault(vault_name: str, vault_path: str) -> Dict[str, Any]:
         logger.warning(f"Vault path does not exist: {vault_path}")
         return {"files": [], "tags": {}, "path": vault_path}
 
-    for md_file in vault_root.rglob("*.md"):
+    for fpath in vault_root.rglob("*"):
+        if not fpath.is_file():
+            continue
+        # Skip hidden files and files inside hidden directories
+        rel_parts = fpath.relative_to(vault_root).parts
+        if any(part.startswith(".") for part in rel_parts):
+            continue
+        ext = fpath.suffix.lower()
+        # Also match extensionless files named like Dockerfile, Makefile
+        basename_lower = fpath.name.lower()
+        if ext not in SUPPORTED_EXTENSIONS and basename_lower not in ("dockerfile", "makefile", "cmakelists.txt"):
+            continue
         try:
-            relative = md_file.relative_to(vault_root)
+            relative = fpath.relative_to(vault_root)
-            stat = md_file.stat()
+            stat = fpath.stat()
             modified = datetime.fromtimestamp(stat.st_mtime, tz=timezone.utc).isoformat()
 
-            raw = md_file.read_text(encoding="utf-8", errors="replace")
+            raw = fpath.read_text(encoding="utf-8", errors="replace")
-            post = frontmatter.loads(raw)
 
-            tags = _extract_tags(post)
+            tags: List[str] = []
-            title = _extract_title(post, md_file)
+            title = fpath.stem.replace("-", " ").replace("_", " ")
-            content_preview = post.content[:200].strip()
+            content_preview = raw[:200].strip()
+
+            if ext == ".md":
+                post = frontmatter.loads(raw)
+                tags = _extract_tags(post)
+                title = _extract_title(post, fpath)
+                content_preview = post.content[:200].strip()
 
             files.append({
                 "path": str(relative).replace("\\", "/"),
@@ -80,13 +108,14 @@ def _scan_vault(vault_name: str, vault_path: str) -> Dict[str, Any]:
                 "content_preview": content_preview,
                 "size": stat.st_size,
                 "modified": modified,
+                "extension": ext,
             })
 
             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}")
+            logger.error(f"Error indexing {fpath}: {e}")
             continue
 
     logger.info(f"Vault '{vault_name}': indexed {len(files)} files, {len(tag_counts)} unique tags")

backend/main.py

@@ -1,4 +1,5 @@
 import re
+import html as html_mod
 import logging
 from pathlib import Path
 from typing import Optional
@@ -7,7 +8,7 @@ import frontmatter
 import mistune
 from fastapi import FastAPI, HTTPException, Query
 from fastapi.staticfiles import StaticFiles
-from fastapi.responses import HTMLResponse, JSONResponse
+from fastapi.responses import HTMLResponse, JSONResponse, FileResponse, PlainTextResponse
 
 from backend.indexer import (
     build_index,
@@ -15,6 +16,7 @@ from backend.indexer import (
     index,
     get_vault_data,
     find_file_in_index,
+    SUPPORTED_EXTENSIONS,
 )
 from backend.search import search, get_all_tags
 
@@ -111,20 +113,26 @@ async def api_browse(vault_name: str, path: str = ""):
                 continue
             rel = str(entry.relative_to(vault_root)).replace("\\", "/")
             if entry.is_dir():
-                # Count .md files recursively
+                # Count all supported files recursively (skip hidden dirs)
-                md_count = sum(1 for _ in entry.rglob("*.md"))
+                file_count = sum(
+                    1 for f in entry.rglob("*")
+                    if f.is_file()
+                    and not any(p.startswith(".") for p in f.relative_to(entry).parts)
+                    and (f.suffix.lower() in SUPPORTED_EXTENSIONS or f.name.lower() in ("dockerfile", "makefile"))
+                )
                 items.append({
                     "name": entry.name,
                     "path": rel,
                     "type": "directory",
-                    "children_count": md_count,
+                    "children_count": file_count,
                 })
-            elif entry.suffix.lower() == ".md":
+            elif entry.suffix.lower() in SUPPORTED_EXTENSIONS or entry.name.lower() in ("dockerfile", "makefile"):
                 items.append({
                     "name": entry.name,
                     "path": rel,
                     "type": "file",
                     "size": entry.stat().st_size,
+                    "extension": entry.suffix.lower(),
                 })
     except PermissionError:
         raise HTTPException(status_code=403, detail="Permission denied")
@@ -132,9 +140,26 @@ async def api_browse(vault_name: str, path: str = ""):
     return {"vault": vault_name, "path": path, "items": items}
 
 
-@app.get("/api/file/{vault_name}")
+# Map file extensions to highlight.js language hints
-async def api_file(vault_name: str, path: str = Query(..., description="Relative path to .md file")):
+EXT_TO_LANG = {
-    """Return rendered HTML + metadata for a markdown file."""
+    ".py": "python", ".js": "javascript", ".ts": "typescript",
+    ".jsx": "jsx", ".tsx": "tsx", ".sh": "bash", ".bash": "bash",
+    ".zsh": "bash", ".fish": "fish", ".bat": "batch", ".cmd": "batch",
+    ".ps1": "powershell", ".json": "json", ".yaml": "yaml", ".yml": "yaml",
+    ".toml": "toml", ".xml": "xml", ".csv": "plaintext",
+    ".cfg": "ini", ".ini": "ini", ".conf": "ini", ".env": "bash",
+    ".html": "html", ".css": "css", ".scss": "scss", ".less": "less",
+    ".java": "java", ".c": "c", ".cpp": "cpp", ".h": "c", ".hpp": "cpp",
+    ".cs": "csharp", ".go": "go", ".rs": "rust", ".rb": "ruby",
+    ".php": "php", ".sql": "sql", ".r": "r", ".swift": "swift",
+    ".kt": "kotlin", ".txt": "plaintext", ".log": "plaintext",
+    ".dockerfile": "dockerfile", ".makefile": "makefile", ".cmake": "cmake",
+}
+
+
+@app.get("/api/file/{vault_name}/raw")
+async def api_file_raw(vault_name: str, path: str = Query(..., description="Relative path to file")):
+    """Return raw file content."""
     vault_data = get_vault_data(vault_name)
     if not vault_data:
         raise HTTPException(status_code=404, detail=f"Vault '{vault_name}' not found")
@@ -146,30 +171,88 @@ async def api_file(vault_name: str, path: str = Query(..., description="Relative
         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)
+    return {"vault": vault_name, "path": path, "raw": raw}
 
-    # Extract metadata
+
-    tags = post.metadata.get("tags", [])
+@app.get("/api/file/{vault_name}/download")
-    if isinstance(tags, str):
+async def api_file_download(vault_name: str, path: str = Query(..., description="Relative path to file")):
-        tags = [t.strip().lstrip("#") for t in tags.split(",") if t.strip()]
+    """Download a file as attachment."""
-    elif isinstance(tags, list):
+    vault_data = get_vault_data(vault_name)
-        tags = [str(t).strip().lstrip("#") for t in tags]
+    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}")
+
+    return FileResponse(
+        path=str(file_path),
+        filename=file_path.name,
+        media_type="application/octet-stream",
+    )
+
+
+@app.get("/api/file/{vault_name}")
+async def api_file(vault_name: str, path: str = Query(..., description="Relative path to file")):
+    """Return rendered HTML + metadata for a 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")
+    ext = file_path.suffix.lower()
+
+    if ext == ".md":
+        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),
+            "extension": ext,
+            "is_markdown": True,
+        }
     else:
-        tags = []
+        # Non-markdown: wrap in syntax-highlighted code block
+        lang = EXT_TO_LANG.get(ext, "plaintext")
+        escaped = html_mod.escape(raw)
+        html_content = f'<pre><code class="language-{lang}">{escaped}</code></pre>'
 
-    title = post.metadata.get("title", file_path.stem.replace("-", " ").replace("_", " "))
+        return {
-
+            "vault": vault_name,
-    html_content = _render_markdown(post.content, vault_name)
+            "path": path,
-
+            "title": file_path.name,
-    return {
+            "tags": [],
-        "vault": vault_name,
+            "frontmatter": {},
-        "path": path,
+            "html": html_content,
-        "title": str(title),
+            "raw_length": len(raw),
-        "tags": tags,
+            "extension": ext,
-        "frontmatter": dict(post.metadata) if post.metadata else {},
+            "is_markdown": False,
-        "html": html_content,
+        }
-        "raw_length": len(raw),
-    }
 
 
 @app.get("/api/search")

frontend/app.js

@@ -9,6 +9,60 @@
   let currentVault = null;
   let currentPath = null;
   let searchTimeout = null;
+  let showingSource = false;
+  let cachedRawSource = null;
+  let allVaults = [];
+  let selectedContextVault = "all";
+
+  // ---------------------------------------------------------------------------
+  // File extension → Lucide icon mapping
+  // ---------------------------------------------------------------------------
+  const EXT_ICONS = {
+    ".md": "file-text",
+    ".txt": "file-text",
+    ".log": "file-text",
+    ".py": "file-code",
+    ".js": "file-code",
+    ".ts": "file-code",
+    ".jsx": "file-code",
+    ".tsx": "file-code",
+    ".html": "file-code",
+    ".css": "file-code",
+    ".scss": "file-code",
+    ".less": "file-code",
+    ".json": "file-json",
+    ".yaml": "file-cog",
+    ".yml": "file-cog",
+    ".toml": "file-cog",
+    ".xml": "file-code",
+    ".sh": "terminal",
+    ".bash": "terminal",
+    ".zsh": "terminal",
+    ".bat": "terminal",
+    ".cmd": "terminal",
+    ".ps1": "terminal",
+    ".java": "file-code",
+    ".c": "file-code",
+    ".cpp": "file-code",
+    ".h": "file-code",
+    ".hpp": "file-code",
+    ".cs": "file-code",
+    ".go": "file-code",
+    ".rs": "file-code",
+    ".rb": "file-code",
+    ".php": "file-code",
+    ".sql": "database",
+    ".csv": "table",
+    ".ini": "file-cog",
+    ".cfg": "file-cog",
+    ".conf": "file-cog",
+    ".env": "file-cog",
+  };
+
+  function getFileIcon(name) {
+    const ext = "." + name.split(".").pop().toLowerCase();
+    return EXT_ICONS[ext] || "file";
+  }
 
   // ---------------------------------------------------------------------------
   // Safe CDN helpers
@@ -66,11 +120,84 @@
     return res.json();
   }
 
+  // ---------------------------------------------------------------------------
+  // Mobile sidebar
+  // ---------------------------------------------------------------------------
+  function initMobile() {
+    const hamburger = document.getElementById("hamburger-btn");
+    const overlay = document.getElementById("sidebar-overlay");
+    const sidebar = document.getElementById("sidebar");
+
+    hamburger.addEventListener("click", () => {
+      sidebar.classList.toggle("mobile-open");
+      overlay.classList.toggle("active");
+    });
+
+    overlay.addEventListener("click", () => {
+      sidebar.classList.remove("mobile-open");
+      overlay.classList.remove("active");
+    });
+  }
+
+  function closeMobileSidebar() {
+    const sidebar = document.getElementById("sidebar");
+    const overlay = document.getElementById("sidebar-overlay");
+    if (sidebar) sidebar.classList.remove("mobile-open");
+    if (overlay) overlay.classList.remove("active");
+  }
+
+  // ---------------------------------------------------------------------------
+  // Vault context switching
+  // ---------------------------------------------------------------------------
+  function initVaultContext() {
+    const filter = document.getElementById("vault-filter");
+    filter.addEventListener("change", async () => {
+      selectedContextVault = filter.value;
+      showingSource = false;
+      cachedRawSource = null;
+      await refreshSidebarForContext();
+      await refreshTagsForContext();
+      showWelcome();
+    });
+  }
+
+  async function refreshSidebarForContext() {
+    const container = document.getElementById("vault-tree");
+    container.innerHTML = "";
+
+    const vaultsToShow = selectedContextVault === "all"
+      ? allVaults
+      : allVaults.filter((v) => v.name === selectedContextVault);
+
+    vaultsToShow.forEach((v) => {
+      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);
+    });
+
+    safeCreateIcons();
+  }
+
+  async function refreshTagsForContext() {
+    const vaultParam = selectedContextVault === "all" ? "" : `?vault=${encodeURIComponent(selectedContextVault)}`;
+    const data = await api(`/api/tags${vaultParam}`);
+    renderTagCloud(data.tags);
+  }
+
   // ---------------------------------------------------------------------------
   // Sidebar — Vault tree
   // ---------------------------------------------------------------------------
   async function loadVaults() {
     const vaults = await api("/api/vaults");
+    allVaults = vaults;
     const container = document.getElementById("vault-tree");
     const filter = document.getElementById("vault-filter");
     container.innerHTML = "";
@@ -156,11 +283,16 @@
           }
         });
       } else {
+        const fileIconName = getFileIcon(item.name);
+        const displayName = item.name.match(/\.md$/i) ? item.name.replace(/\.md$/i, "") : item.name;
         const fileItem = el("div", { class: "tree-item", "data-vault": vaultName, "data-path": item.path }, [
-          icon("file-text", 16),
+          icon(fileIconName, 16),
-          document.createTextNode(` ${item.name.replace(/\.md$/i, "")}`),
+          document.createTextNode(` ${displayName}`),
         ]);
-        fileItem.addEventListener("click", () => openFile(vaultName, item.path));
+        fileItem.addEventListener("click", () => {
+          openFile(vaultName, item.path);
+          closeMobileSidebar();
+        });
         container.appendChild(fileItem);
       }
     });
@@ -168,15 +300,74 @@
     safeCreateIcons();
   }
 
+  // ---------------------------------------------------------------------------
+  // Sidebar filter
+  // ---------------------------------------------------------------------------
+  function initSidebarFilter() {
+    const input = document.getElementById("sidebar-filter-input");
+    input.addEventListener("input", () => {
+      const q = input.value.trim().toLowerCase();
+      filterSidebarTree(q);
+      filterTagCloud(q);
+    });
+  }
+
+  function filterSidebarTree(query) {
+    const tree = document.getElementById("vault-tree");
+    const items = tree.querySelectorAll(".tree-item");
+
+    if (!query) {
+      items.forEach((item) => item.classList.remove("filtered-out"));
+      tree.querySelectorAll(".tree-children").forEach((c) => c.classList.remove("filtered-out"));
+      return;
+    }
+
+    // First pass: mark all as filtered out
+    items.forEach((item) => item.classList.add("filtered-out"));
+    tree.querySelectorAll(".tree-children").forEach((c) => c.classList.add("filtered-out"));
+
+    // Second pass: show matching items and their ancestors
+    items.forEach((item) => {
+      const text = item.textContent.toLowerCase();
+      if (text.includes(query)) {
+        item.classList.remove("filtered-out");
+        // Show all ancestor containers
+        let parent = item.parentElement;
+        while (parent && parent !== tree) {
+          parent.classList.remove("filtered-out");
+          if (parent.classList.contains("tree-children")) {
+            parent.classList.remove("collapsed");
+          }
+          parent = parent.parentElement;
+        }
+      }
+    });
+  }
+
+  function filterTagCloud(query) {
+    const tags = document.querySelectorAll("#tag-cloud .tag-item");
+    tags.forEach((tag) => {
+      const text = tag.textContent.toLowerCase();
+      if (!query || text.includes(query)) {
+        tag.classList.remove("filtered-out");
+      } else {
+        tag.classList.add("filtered-out");
+      }
+    });
+  }
+
   // ---------------------------------------------------------------------------
   // Tags
   // ---------------------------------------------------------------------------
   async function loadTags() {
     const data = await api("/api/tags");
+    renderTagCloud(data.tags);
+  }
+
+  function renderTagCloud(tags) {
     const cloud = document.getElementById("tag-cloud");
     cloud.innerHTML = "";
 
-    const tags = data.tags;
     const counts = Object.values(tags);
     if (counts.length === 0) return;
 
@@ -198,7 +389,8 @@
   function searchByTag(tag) {
     const input = document.getElementById("search-input");
     input.value = "";
-    performSearch("", "all", tag);
+    const vault = document.getElementById("vault-filter").value;
+    performSearch("", vault, tag);
   }
 
   // ---------------------------------------------------------------------------
@@ -207,12 +399,16 @@
   async function openFile(vaultName, filePath) {
     currentVault = vaultName;
     currentPath = filePath;
+    showingSource = false;
+    cachedRawSource = null;
 
     // Highlight active
     document.querySelectorAll(".tree-item.active").forEach((el) => el.classList.remove("active"));
-    const selector = `.tree-item[data-vault="${vaultName}"][data-path="${filePath}"]`;
+    const selector = `.tree-item[data-vault="${vaultName}"][data-path="${CSS.escape(filePath)}"]`;
-    const active = document.querySelector(selector);
+    try {
-    if (active) active.classList.add("active");
+      const active = document.querySelector(selector);
+      if (active) active.classList.add("active");
+    } catch (e) { /* selector might fail on special chars */ }
 
     const url = `/api/file/${encodeURIComponent(vaultName)}?path=${encodeURIComponent(filePath)}`;
     const data = await api(url);
@@ -248,15 +444,38 @@
       tagsDiv.appendChild(t);
     });
 
-    // Copy path button
+    // Action buttons
-    const copyBtn = el("button", { class: "btn-copy-path" }, [document.createTextNode("Copier le chemin")]);
+    const copyBtn = el("button", { class: "btn-action", title: "Copier le chemin" }, [
+      icon("copy", 14),
+      document.createTextNode("Copier"),
+    ]);
     copyBtn.addEventListener("click", () => {
       navigator.clipboard.writeText(`${data.vault}/${data.path}`).then(() => {
-        copyBtn.textContent = "Copié !";
+        copyBtn.querySelector("span") || (copyBtn.lastChild.textContent = "Copié !");
-        setTimeout(() => (copyBtn.textContent = "Copier le chemin"), 1500);
+        copyBtn.lastChild.textContent = "Copié !";
+        setTimeout(() => (copyBtn.lastChild.textContent = "Copier"), 1500);
       });
     });
 
+    const sourceBtn = el("button", { class: "btn-action", title: "Voir la source" }, [
+      icon("code", 14),
+      document.createTextNode("Source"),
+    ]);
+
+    const downloadBtn = el("button", { class: "btn-action", title: "Télécharger" }, [
+      icon("download", 14),
+      document.createTextNode("Télécharger"),
+    ]);
+    downloadBtn.addEventListener("click", () => {
+      const dlUrl = `/api/file/${encodeURIComponent(data.vault)}/download?path=${encodeURIComponent(data.path)}`;
+      const a = document.createElement("a");
+      a.href = dlUrl;
+      a.download = data.path.split("/").pop();
+      document.body.appendChild(a);
+      a.click();
+      document.body.removeChild(a);
+    });
+
     // Frontmatter
     let fmSection = null;
     if (data.frontmatter && Object.keys(data.frontmatter).length > 0) {
@@ -273,20 +492,48 @@
       fmSection = el("div", {}, [fmToggle, fmContent]);
     }
 
-    // Markdown content
+    // Content container (rendered HTML)
-    const mdDiv = el("div", { class: "md-content" });
+    const mdDiv = el("div", { class: "md-content", id: "file-rendered-content" });
     mdDiv.innerHTML = data.html;
 
+    // Raw source container (hidden initially)
+    const rawDiv = el("div", { class: "raw-source-view", id: "file-raw-content", style: "display:none" });
+
+    // Source button toggle logic
+    sourceBtn.addEventListener("click", async () => {
+      const rendered = document.getElementById("file-rendered-content");
+      const raw = document.getElementById("file-raw-content");
+      if (!rendered || !raw) return;
+
+      showingSource = !showingSource;
+      if (showingSource) {
+        sourceBtn.classList.add("active");
+        if (!cachedRawSource) {
+          const rawUrl = `/api/file/${encodeURIComponent(data.vault)}/raw?path=${encodeURIComponent(data.path)}`;
+          const rawData = await api(rawUrl);
+          cachedRawSource = rawData.raw;
+        }
+        raw.textContent = cachedRawSource;
+        rendered.style.display = "none";
+        raw.style.display = "block";
+      } else {
+        sourceBtn.classList.remove("active");
+        rendered.style.display = "block";
+        raw.style.display = "none";
+      }
+    });
+
     // 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]),
+      el("div", { class: "file-actions" }, [copyBtn, sourceBtn, downloadBtn]),
     ]));
     if (fmSection) area.appendChild(fmSection);
     area.appendChild(mdDiv);
+    area.appendChild(rawDiv);
 
     // Highlight code blocks
     area.querySelectorAll("pre code").forEach((block) => {
@@ -303,6 +550,7 @@
       });
     });
 
+    safeCreateIcons();
     area.scrollTop = 0;
   }
 
@@ -375,6 +623,89 @@
     area.appendChild(container);
   }
 
+  // ---------------------------------------------------------------------------
+  // Resizable sidebar (horizontal)
+  // ---------------------------------------------------------------------------
+  function initSidebarResize() {
+    const handle = document.getElementById("sidebar-resize-handle");
+    const sidebar = document.getElementById("sidebar");
+    if (!handle || !sidebar) return;
+
+    // Restore saved width
+    const savedWidth = localStorage.getItem("obsigate-sidebar-width");
+    if (savedWidth) {
+      sidebar.style.width = savedWidth + "px";
+    }
+
+    let startX = 0;
+    let startWidth = 0;
+
+    function onMouseMove(e) {
+      const newWidth = Math.min(500, Math.max(200, startWidth + (e.clientX - startX)));
+      sidebar.style.width = newWidth + "px";
+    }
+
+    function onMouseUp() {
+      document.body.classList.remove("resizing");
+      handle.classList.remove("active");
+      document.removeEventListener("mousemove", onMouseMove);
+      document.removeEventListener("mouseup", onMouseUp);
+      localStorage.setItem("obsigate-sidebar-width", parseInt(sidebar.style.width));
+    }
+
+    handle.addEventListener("mousedown", (e) => {
+      e.preventDefault();
+      startX = e.clientX;
+      startWidth = sidebar.getBoundingClientRect().width;
+      document.body.classList.add("resizing");
+      handle.classList.add("active");
+      document.addEventListener("mousemove", onMouseMove);
+      document.addEventListener("mouseup", onMouseUp);
+    });
+  }
+
+  // ---------------------------------------------------------------------------
+  // Resizable tag section (vertical)
+  // ---------------------------------------------------------------------------
+  function initTagResize() {
+    const handle = document.getElementById("tag-resize-handle");
+    const tagSection = document.getElementById("tag-cloud-section");
+    if (!handle || !tagSection) return;
+
+    // Restore saved height
+    const savedHeight = localStorage.getItem("obsigate-tag-height");
+    if (savedHeight) {
+      tagSection.style.height = savedHeight + "px";
+    }
+
+    let startY = 0;
+    let startHeight = 0;
+
+    function onMouseMove(e) {
+      // Dragging up increases height, dragging down decreases
+      const newHeight = Math.min(400, Math.max(60, startHeight - (e.clientY - startY)));
+      tagSection.style.height = newHeight + "px";
+    }
+
+    function onMouseUp() {
+      document.body.classList.remove("resizing-v");
+      handle.classList.remove("active");
+      document.removeEventListener("mousemove", onMouseMove);
+      document.removeEventListener("mouseup", onMouseUp);
+      localStorage.setItem("obsigate-tag-height", parseInt(tagSection.style.height));
+    }
+
+    handle.addEventListener("mousedown", (e) => {
+      e.preventDefault();
+      startY = e.clientY;
+      startHeight = tagSection.getBoundingClientRect().height;
+      document.body.classList.add("resizing-v");
+      handle.classList.add("active");
+      document.addEventListener("mousemove", onMouseMove);
+      document.addEventListener("mouseup", onMouseUp);
+    });
+  }
+
   // ---------------------------------------------------------------------------
   // Helpers
   // ---------------------------------------------------------------------------
@@ -430,6 +761,11 @@
     initTheme();
     document.getElementById("theme-toggle").addEventListener("click", toggleTheme);
     initSearch();
+    initMobile();
+    initVaultContext();
+    initSidebarFilter();
+    initSidebarResize();
+    initTagResize();
 
     try {
       await Promise.all([loadVaults(), loadTags()]);

frontend/index.html

@@ -15,6 +15,10 @@
 
     <!-- Header -->
     <header class="header">
+      <button class="hamburger-btn" id="hamburger-btn" title="Menu">
+        <i data-lucide="menu" style="width:20px;height:20px"></i>
+      </button>
+
       <div class="header-logo">
         <i data-lucide="book-open" style="width:20px;height:20px"></i>
         ObsiGate
@@ -37,19 +41,34 @@
     <!-- Main -->
     <div class="main-body">
 
+      <!-- Mobile overlay -->
+      <div class="sidebar-overlay" id="sidebar-overlay"></div>
+
       <!-- Sidebar -->
-      <aside class="sidebar">
+      <aside class="sidebar" id="sidebar">
+        <!-- Sidebar filter -->
+        <div class="sidebar-filter">
+          <i data-lucide="filter" class="sidebar-filter-icon" style="width:14px;height:14px"></i>
+          <input type="text" id="sidebar-filter-input" placeholder="Filtrer fichiers et tags..." autocomplete="off">
+        </div>
+
         <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">
+        <!-- Tag resize handle -->
+        <div class="tag-resize-handle" id="tag-resize-handle"></div>
+
+        <div class="tag-cloud-section" id="tag-cloud-section">
           <div class="tag-cloud-title">Tags</div>
           <div class="tag-cloud" id="tag-cloud"></div>
         </div>
       </aside>
 
+      <!-- Sidebar resize handle -->
+      <div class="sidebar-resize-handle" id="sidebar-resize-handle"></div>
+
       <!-- Content -->
       <main class="content-area" id="content-area">
         <div class="welcome" id="welcome">

frontend/style.css

@@ -24,6 +24,8 @@
   --code-bg: #161b22;
   --search-bg: #21262d;
   --scrollbar: #30363d;
+  --resize-handle: #30363d;
+  --overlay-bg: rgba(0,0,0,0.5);
 }
 
 /* ===== THEME — LIGHT ===== */
@@ -43,6 +45,8 @@
   --code-bg: #f6f8fa;
   --search-bg: #ffffff;
   --scrollbar: #d0d7de;
+  --resize-handle: #d0d7de;
+  --overlay-bg: rgba(0,0,0,0.3);
 }
 
 /* ===== BASE ===== */
@@ -89,6 +93,21 @@ a:hover {
   transition: background 200ms ease;
 }
 
+.hamburger-btn {
+  display: none;
+  background: none;
+  border: none;
+  color: var(--text-secondary);
+  cursor: pointer;
+  padding: 4px;
+  align-items: center;
+  justify-content: center;
+  flex-shrink: 0;
+}
+.hamburger-btn:hover {
+  color: var(--accent);
+}
+
 .header-logo {
   font-family: 'JetBrains Mono', monospace;
   font-weight: 700;
@@ -164,24 +183,74 @@ a:hover {
   display: flex;
   flex: 1;
   overflow: hidden;
+  position: relative;
+}
+
+/* --- Mobile overlay --- */
+.sidebar-overlay {
+  display: none;
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: var(--overlay-bg);
+  z-index: 199;
+}
+.sidebar-overlay.active {
+  display: block;
 }
 
 /* --- Sidebar --- */
 .sidebar {
   width: 280px;
-  min-width: 280px;
+  min-width: 200px;
+  max-width: 500px;
   background: var(--bg-sidebar);
   border-right: 1px solid var(--border);
   display: flex;
   flex-direction: column;
   overflow: hidden;
   transition: background 200ms ease;
+  flex-shrink: 0;
+}
+
+/* --- Sidebar filter --- */
+.sidebar-filter {
+  padding: 10px 12px;
+  border-bottom: 1px solid var(--border);
+  position: relative;
+  flex-shrink: 0;
+}
+.sidebar-filter input {
+  width: 100%;
+  padding: 6px 10px 6px 32px;
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  background: var(--search-bg);
+  color: var(--text-primary);
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.78rem;
+  outline: none;
+  transition: border-color 200ms ease;
+}
+.sidebar-filter input:focus {
+  border-color: var(--accent);
+}
+.sidebar-filter-icon {
+  position: absolute;
+  left: 22px;
+  top: 50%;
+  transform: translateY(-50%);
+  color: var(--text-muted);
+  pointer-events: none;
 }
 
 .sidebar-tree {
   flex: 1;
   overflow-y: auto;
   padding: 12px 0;
+  min-height: 80px;
 }
 
 .sidebar-tree::-webkit-scrollbar {
@@ -225,6 +294,9 @@ a:hover {
   background: var(--bg-hover);
   color: var(--accent);
 }
+.tree-item.filtered-out {
+  display: none;
+}
 
 .tree-item .icon {
   width: 16px;
@@ -246,13 +318,33 @@ a:hover {
 .tree-children.collapsed {
   display: none;
 }
+.tree-children.filtered-out {
+  display: none;
+}
+
+/* --- Tag resize handle --- */
+.tag-resize-handle {
+  height: 5px;
+  cursor: ns-resize;
+  background: transparent;
+  border-top: 1px solid var(--border);
+  flex-shrink: 0;
+  transition: background 150ms ease;
+}
+.tag-resize-handle:hover,
+.tag-resize-handle.active {
+  background: var(--accent);
+  opacity: 0.5;
+}
 
 /* --- Tag Cloud --- */
 .tag-cloud-section {
-  border-top: 1px solid var(--border);
   padding: 12px 16px;
-  max-height: 180px;
+  height: 180px;
+  min-height: 60px;
+  max-height: 400px;
   overflow-y: auto;
+  flex-shrink: 0;
 }
 .tag-cloud-section::-webkit-scrollbar {
   width: 6px;
@@ -292,13 +384,32 @@ a:hover {
 .tag-item:hover {
   opacity: 0.8;
 }
+.tag-item.filtered-out {
+  display: none;
+}
+
+/* --- Sidebar resize handle (horizontal) --- */
+.sidebar-resize-handle {
+  width: 5px;
+  cursor: ew-resize;
+  background: transparent;
+  flex-shrink: 0;
+  transition: background 150ms ease;
+  z-index: 10;
+}
+.sidebar-resize-handle:hover,
+.sidebar-resize-handle.active {
+  background: var(--accent);
+  opacity: 0.5;
+}
 
 /* --- Content Area --- */
 .content-area {
   flex: 1;
   overflow-y: auto;
-  padding: 28px 40px 60px;
+  padding: clamp(16px, 3vw, 40px) clamp(16px, 4vw, 40px) 60px;
   transition: background 200ms ease;
+  min-width: 0;
 }
 .content-area::-webkit-scrollbar {
   width: 8px;
@@ -384,8 +495,12 @@ a:hover {
 }
 .file-actions {
   margin-top: 8px;
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+  align-items: center;
 }
-.btn-copy-path {
+.btn-action {
   font-family: 'JetBrains Mono', monospace;
   font-size: 0.75rem;
   padding: 4px 10px;
@@ -395,11 +510,19 @@ a:hover {
   color: var(--text-secondary);
   cursor: pointer;
   transition: color 150ms ease, border-color 150ms ease;
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
 }
-.btn-copy-path:hover {
+.btn-action:hover {
   color: var(--accent);
   border-color: var(--accent);
 }
+.btn-action.active {
+  color: var(--accent);
+  border-color: var(--accent);
+  background: var(--tag-bg);
+}
 
 /* Frontmatter collapsible */
 .frontmatter-toggle {
@@ -432,6 +555,24 @@ a:hover {
   display: block;
 }
 
+/* --- Raw source view --- */
+.raw-source-view {
+  background: var(--code-bg);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  padding: 16px;
+  margin-top: 12px;
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 0.82rem;
+  color: var(--text-secondary);
+  white-space: pre-wrap;
+  word-break: break-word;
+  overflow-x: auto;
+  line-height: 1.55;
+  max-height: 70vh;
+  overflow-y: auto;
+}
+
 /* --- Markdown Rendered Content --- */
 .md-content h1, .md-content h2, .md-content h3,
 .md-content h4, .md-content h5, .md-content h6 {
@@ -600,22 +741,82 @@ a:hover {
   padding: 1px 6px;
 }
 
-/* --- Responsive --- */
+/* --- No-select during resize --- */
-@media (max-width: 768px) {
+body.resizing {
+  user-select: none;
+  -webkit-user-select: none;
+  cursor: ew-resize;
+}
+body.resizing-v {
+  user-select: none;
+  -webkit-user-select: none;
+  cursor: ns-resize;
+}
+
+/* --- Responsive — Tablet --- */
+@media (max-width: 1024px) {
   .sidebar {
-    width: 220px;
+    width: 240px;
-    min-width: 220px;
+    min-width: 200px;
-  }
-  .content-area {
-    padding: 20px;
   }
 }
 
-@media (max-width: 600px) {
+/* --- Responsive — Mobile --- */
+@media (max-width: 768px) {
+  .hamburger-btn {
+    display: flex;
+  }
+
+  .header {
+    gap: 8px;
+    padding: 8px 12px;
+  }
+
+  .header-logo {
+    font-size: 1rem;
+  }
+
+  .search-wrapper {
+    max-width: none;
+    flex: 1;
+  }
+
+  .search-vault-filter {
+    font-size: 0.72rem;
+    padding: 5px 6px;
+  }
+
   .sidebar {
+    position: fixed;
+    top: 0;
+    left: 0;
+    bottom: 0;
+    z-index: 200;
+    width: 280px !important;
+    min-width: 280px !important;
+    max-width: 85vw !important;
+    transform: translateX(-100%);
+    transition: transform 250ms ease, background 200ms ease;
+    box-shadow: none;
+  }
+  .sidebar.mobile-open {
+    transform: translateX(0);
+    box-shadow: 4px 0 20px rgba(0,0,0,0.3);
+  }
+
+  .sidebar-resize-handle {
     display: none;
   }
+
   .content-area {
-    padding: 16px;
+    padding: 16px 12px 60px;
+  }
+
+  .file-title {
+    font-size: 1.2rem;
+  }
+
+  .file-actions {
+    flex-wrap: wrap;
   }
 }