fix: sidebar workspace tree + pages DB — emojis → outlined icons

Root cause: 3 sources d'icônes colorées dans le sidebar:
1. _workspace_tree_macro.html L28: {{ page.icon }} raw → filtré via valid_icons
2. db.py: DEFAULT '📄' → 'file'
3. board.py _file_icon(): 15 émojis → 'file'/'edit'/'image'
4. board.py/dashboard.py: JSON icon: 📄/📁 → file/folder
5. base.html L931: JS favorites icon → validNames filter
6. base.html render_tree_item: valid_icons list étendue + fallback

Migration: nouvelles pages utilisent 'file'/'folder'. Pages existantes
avec émojis → les templates utilisent le fallback automatiquement.
143 tests passent

app/routers/board.py

@@ -63,7 +63,7 @@ def _map_issue_to_card(issue: dict, owner: str = "", repo: str = "") -> dict:
         "bug": "🐛", "feature": "✨", "enhancement": "⚡", "documentation": "📄",
         "design": "🎨", "testing": "🧪", "refactor": "🔧", "security": "🔒",
     }
-    icon = "📄"
+    icon = "file"
     for lbl in labels:
         for kw, emoji in icon_map.items():
             if kw in lbl.get("name", "").lower():
@@ -142,27 +142,27 @@ def _build_page_tree(conn, parent_id: int | None, ws_key: str, depth: int = 0, m
 
 
 def _file_icon(name: str, content_format: str = "") -> str:
-    """Map file extension to emoji icon."""
+    """Map file extension to icon name (SVG-safe)."""
     import re
     # FlowDeck internal pages (no extension)
     if content_format and content_format != 'file':
-        return '📝'
+        return 'edit'
     n = name.lower()
-    if re.search(r'\.(png|jpe?g|gif|webp|svg|bmp|ico)$', n): return '🖼️'
-    if n.endswith('.pdf'): return '📕'
-    if re.search(r'\.(md|markdown)$', n): return '📝'
-    if n.endswith('.py'): return '🐍'
-    if re.search(r'\.(js|jsx|ts|tsx)$', n): return '📜'
-    if re.search(r'\.(html?|xml)$', n): return '🌐'
-    if n.endswith('.css'): return '🎨'
-    if n.endswith('.json'): return '📋'
-    if n.endswith('.sql'): return '🗃️'
-    if re.search(r'\.(sh|bash|zsh)$', n): return '💻'
-    if n.endswith('.ps1'): return '⚡'
-    if re.search(r'\.(rs|go|java|rb|php|c|cpp|h|swift|kt|scala|r)$', n): return '📜'
-    if re.search(r'\.(txt|log)$', n): return '📄'
-    if re.search(r'\.(zip|tar|gz|rar|7z)$', n): return '📦'
-    return '📄'
+    if re.search(r'\.(png|jpe?g|gif|webp|svg|bmp|ico)$', n): return 'image'
+    if n.endswith('.pdf'): return 'file'
+    if re.search(r'\.(md|markdown)$', n): return 'edit'
+    if n.endswith('.py'): return 'file'
+    if re.search(r'\.(js|jsx|ts|tsx)$', n): return 'file'
+    if re.search(r'\.(html?|xml)$', n): return 'file'
+    if n.endswith('.css'): return 'file'
+    if n.endswith('.json'): return 'file'
+    if n.endswith('.sql'): return 'file'
+    if re.search(r'\.(sh|bash|zsh)$', n): return 'file'
+    if n.endswith('.ps1'): return 'file'
+    if re.search(r'\.(rs|go|java|rb|php|c|cpp|h|swift|kt|scala|r)$', n): return 'file'
+    if re.search(r'\.(txt|log)$', n): return 'file'
+    if re.search(r'\.(zip|tar|gz|rar|7z)$', n): return 'file'
+    return 'file'
 
 
 def _load_workspace_pages(ws_cookie: str) -> list:

app/routers/dashboard.py

@@ -96,7 +96,7 @@ def _sidebar_data(request: Request, repos: list[dict], include_workspace: bool =
         recent_pages.append({
             "id": full_name,
             "name": repo.get("name", full_name),
-            "icon": "📁",
+            "icon": "folder",
             "url": f"/board/{full_name}",
             "active": False,
             "indent": 0,
@@ -430,7 +430,7 @@ async def help_page(request: Request):
 </div>
 
 <div class="help-card">
-<h3><span class="icon">📁</span>Workspaces</h3>
+<h3><span class="icon">{{ fd_icon("folder",16) }}</span>Workspaces</h3>
 <p>Organize your work into separate workspaces. Each has its own pages and files.</p>
 <ul>
 <li><span class="help-badge local">Local</span> Files stored on your server</li>
@@ -1100,7 +1100,7 @@ def _nav_breadcrumb(conn, page_id: int) -> list:
             "id": row["id"],
             "label": title,
             "url": None,
-            "icon": "\U0001F4C1" if is_folder else _file_icon(title, row["content_format"]),
+            "icon": "folder" if is_folder else _file_icon(title, row["content_format"]),
             "menu": True,
         })
         current = row["parent_id"]
@@ -1160,7 +1160,7 @@ async def nav_menu(request: Request, workspace_id: int = None, parent_id: int =
             items.append({
                 "id": r["id"],
                 "name": title,
-                "icon": "\U0001F4C1" if is_folder else _file_icon(title, r["content_format"]),
+                "icon": "folder" if is_folder else _file_icon(title, r["content_format"]),
                 "has_children": child_counts.get(r["id"], 0) > 0,
                 "url": f"/pages/{r['id']}",
             })