fix: A12–A24 — SSRF, auth routes legacy, uploads, N+1 et routes doublonnes (v7.3.3)

- A12 — `og_fetcher` : GET sans `follow_redirects`, `_is_public_host` revérifié à
  chaque saut (max 5) ; `POST /board/api/og/metadata` → 400 sur hôte privé/loopback
- A13 — router automations sous `Depends(_require_session)` (CRUD, run,
  press-button) + `created_by` sans fallback ; action `webhook` validée par
  `_is_public_host` avant POST (SSRF)
- A15 — webhooks sortants : `_require_admin` sur GET/POST/DELETE + `_is_public_host`
  sur l'URL en création
- A17 — router legacy `/api` sous `Depends(_require_session_or_bearer)` (session ou
  Bearer `/api/v1`), allowlist explicite `/api/health` + `/api/frontend-error`
- A22 — les 2 uploads locales : session exigée (`_require_user_id`) + `validate_upload`
  branché (taille + extension) + `FLOWDECK_DATA_DIR` au lieu de `/data` codé en dur
- A23 — N+1 : COUNT→`GROUP BY` (dashboard), cards→`executemany` (board sync),
  duplicata de propriétés→`executemany` + remap des ids par SELECT (collections)
- A24 — 2 routes écrasées supprimées : `GET /api/projects` (api.py) et
  `GET /workspace` (workspace.py) + test « aucun doublon méthode+chemin »
- Tests : +9 dans `tests/test_audit_p0_fixes.py` (SSRF, 401s, validate_upload,
  doublons de routes) ; tests OG sur hôtes résolubles (la garde fait du DNS)
- suite **1025/1025** · `ruff check app tests` OK

app/routers/workspace.py

@@ -26,6 +26,16 @@ def _current_user(request: Request) -> dict:
     return SessionManager.decode_session(s) or {"login": "admin", "id": 1}
 
 
+def _require_admin(request: Request) -> dict:
+    """A15 : webhooks sortants = admin — le serveur POSTe le contenu des pages."""
+    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
+    if not user or not user.get("id"):
+        raise HTTPException(401, "Authentication required")
+    if not user.get("is_admin"):
+        raise HTTPException(403, "Admin only")
+    return user
+
+
 def _require_ws_admin(request: Request, ws_id: int) -> None:
     """A5 — CRUD des membres : session obligatoire + rôle admin de l'espace
     (ou admin global). Un anonymous ne peut plus s'ajouter lui-même ni se
@@ -46,13 +56,6 @@ def _require_ws_admin(request: Request, ws_id: int) -> None:
 
 # ── Workspaces ──
 
-@router.get("")
-async def list_workspaces(request: Request):
-    with get_conn() as conn:
-        rows = conn.execute("SELECT * FROM workspaces ORDER BY name").fetchall()
-    return {"workspaces": [dict(r) for r in rows]}
-
-
 @router.post("")
 async def create_workspace(request: Request):
     body = await request.json() if request.headers.get("content-type") else {}
@@ -688,6 +691,7 @@ async def export_csv(request: Request, collection_id: int):
 
 @router.get("/webhooks")
 async def list_webhooks(request: Request):
+    _require_admin(request)
     with get_conn() as conn:
         rows = conn.execute("SELECT * FROM webhook_subscriptions ORDER BY created_at DESC").fetchall()
     return {"webhooks": [dict(r) for r in rows]}
@@ -695,12 +699,20 @@ async def list_webhooks(request: Request):
 
 @router.post("/webhooks")
 async def create_webhook(request: Request):
+    _require_admin(request)
     body = await request.json() if request.headers.get("content-type") else {}
     url = body.get("url", "").strip()
     event = body.get("event", "page.created")
     secret = body.get("secret", "")
     if not url:
         raise HTTPException(400, "url required")
+    # A15 : SSRF — le scheduler POSTe le contenu des pages vers cette URL.
+    from urllib.parse import urlparse
+
+    from app.services.importers.url_fetch import _is_public_host
+    parsed = urlparse(url)
+    if parsed.scheme not in ("http", "https") or not parsed.hostname or not _is_public_host(parsed.hostname):
+        raise HTTPException(400, f"url non autorisée: {parsed.hostname}")
     with get_conn() as conn:
         cur = conn.execute(
             "INSERT INTO webhook_subscriptions (url, event, secret) VALUES (?,?,?)",
@@ -712,6 +724,7 @@ async def create_webhook(request: Request):
 
 @router.delete("/webhooks/{wh_id}")
 async def delete_webhook(request: Request, wh_id: int):
+    _require_admin(request)
     with get_conn() as conn:
         conn.execute("DELETE FROM webhook_subscriptions WHERE id=?", (wh_id,))
         conn.commit()