fix: Gitea workspace — correct sidebar name, newPage stays remote, cookie persisted

Bug 1: newPageInWorkspace() allait toujours vers local-workspace API
→ Maintenant détecte workspaceKey contient '/' → Gitea API PUT file

Bug 2: workspace_name dans gitea_workspace ne persistait pas
→ Cookie flowdeck_workspace posé côté serveur au premier chargement

Bug 3: icône 📁 fixe dans sidebar — pas d'indication remote
→ 🔗 affiché quand workspace_key contient '/' (remote), 📁 sinon

newFolderInWorkspace() : avertissement si workspace distant
(car les dossiers n'existent pas dans un repo Git)

app/routers/dashboard.py

@@ -380,16 +380,25 @@ async def gitea_workspace_page(request: Request):
         return RedirectResponse("/auth/login?provider=local", status_code=302)
     owner = request.query_params.get("owner", "")
     repo = request.query_params.get("repo", "")
+    ws_key = f"{owner}/{repo}" if owner and repo else ""
+    ws_name = ws_key or "Gitea Workspace"
     ctx = {
         **sidebar,
         "user": user,
-        "workspace_name": f"{owner}/{repo}" if owner and repo else "Gitea Workspace",
+        "active_ws_name": ws_name,
+        "workspace_key": ws_key,
+        "workspace_name": ws_name,
         "workspace_initial": repo[0].upper() if repo else "G",
         "owner": owner,
         "repo": repo,
     }
     template = env.get_template("gitea_workspace.html")
-    return template.render(**ctx)
+    response = template.render(**ctx)
+    # Set workspace cookie so subsequent navigations remember the active Gitea project
+    resp = HTMLResponse(content=response)
+    if ws_key:
+        resp.set_cookie("flowdeck_workspace", f"gitea:{owner}:{repo}", path="/", samesite="lax")
+    return resp
 
 
 @router.get("/api/workspace/projects")