fix: add workspace routes + RedirectResponse import to dashboard.py

- GET /workspace — unified workspace page
- GET /api/workspace/projects — JSON API for built-in + Gitea projects
- POST /api/workspace/projects — create built-in project
- Added RedirectResponse to imports

app/routers/dashboard.py

@@ -303,3 +303,67 @@ async def dashboard(
     template = env.get_template("dashboard.html")
     return template.render(request=request, repos=repos, search=search,
                            show_archived=show_archived, **sidebar)
+
+
+# ═══════════ Workspace ═══════════
+
+@router.get("/workspace", response_class=HTMLResponse)
+async def workspace_page(request: Request):
+    """Unified workspace showing all projects."""
+    from jinja2 import Environment, FileSystemLoader
+    env = Environment(loader=FileSystemLoader("app/templates"))
+    sidebar = _sidebar_data(request, [])
+    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
+    if not user:
+        return RedirectResponse("/auth/login?provider=local", status_code=302)
+    ctx = {**sidebar, "user": user}
+    template = env.get_template("workspace.html")
+    return template.render(**ctx)
+
+
+@router.get("/api/workspace/projects")
+async def list_workspace_projects(request: Request):
+    """List all projects: built-in + Gitea + GitHub."""
+    builtin = []
+    with get_conn() as conn:
+        rows = conn.execute(
+            "SELECT id, title FROM pages WHERE parent_id IS NULL ORDER BY updated_at DESC LIMIT 20"
+        ).fetchall()
+        for r in rows:
+            count = conn.execute("SELECT COUNT(*) FROM pages WHERE parent_id=?", (r["id"],)).fetchone()[0]
+            builtin.append({"id": str(r["id"]), "name": r["title"] or "Untitled", "pageCount": count, "forge": "builtin"})
+
+    gitea_repos = []
+    try:
+        repos = await gitea.get_user_repos(page=1, limit=50)
+        for repo in repos:
+            gitea_repos.append({
+                "id": str(repo.get("id", "")),
+                "name": repo.get("name", ""),
+                "full_name": repo.get("full_name", ""),
+                "description": repo.get("description", ""),
+                "html_url": repo.get("html_url", ""),
+                "language": repo.get("language", ""),
+                "forge": "gitea",
+            })
+    except Exception:
+        pass
+
+    return {"builtin": builtin, "gitea": gitea_repos, "github": []}
+
+
+@router.post("/api/workspace/projects")
+async def create_workspace_project(request: Request):
+    import json
+    body = await request.json()
+    name = body.get("name", "").strip()
+    if not name:
+        return {"error": "Name required"}
+    with get_conn() as conn:
+        cursor = conn.execute(
+            "INSERT INTO pages (workspace, title, content, content_format, parent_section) VALUES ('', ?, '', 'blocks', 'Private')",
+            (name,),
+        )
+        conn.commit()
+        pid = cursor.lastrowid
+    return {"id": pid, "name": name, "forge": "builtin"}