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/api.py

@@ -5,7 +5,7 @@ import json
 import logging
 from datetime import datetime
 
-from fastapi import APIRouter, HTTPException, Query, Request
+from fastapi import APIRouter, Depends, HTTPException, Query, Request
 from fastapi.responses import HTMLResponse
 
 from app.auth.session import SessionManager
@@ -15,7 +15,27 @@ from app.routers.board import STATUS_COLORS, STATUS_LABELS, _issue_column, _map_
 from app.services.gitea_client import gitea
 
 logger = logging.getLogger(__name__)
-router = APIRouter(tags=["api"], prefix="/api")
+
+# A17 : ce router legacy ne sert plus un anonymous. Deux exceptions assumées —
+# le probe d'infra (Docker HEALTHCHECK / CI) et la remontée d'erreur client.
+_API_PUBLIC_PATHS = {"/api/health", "/api/frontend-error"}
+
+
+async def _require_session_or_bearer(request: Request) -> None:
+    """Session de cookie **ou** Bearer d'API valide sur toutes les routes /api."""
+    if request.url.path in _API_PUBLIC_PATHS:
+        return
+    if SessionManager.decode_session(request.cookies.get("flowdeck_session", "")):
+        return
+    auth = request.headers.get("Authorization", "")
+    if auth.startswith("Bearer "):
+        from app.routers.public_api import verify_token
+        verify_token(auth)
+        return
+    raise HTTPException(401, "Authentication required")
+
+
+router = APIRouter(tags=["api"], prefix="/api", dependencies=[Depends(_require_session_or_bearer)])
 
 # ── Simple rate limiter (in-memory, per-IP) ──
 _rate_limit_store: dict[str, tuple[float, int]] = {}
@@ -79,22 +99,6 @@ async def stats():
     }
 
 
-@router.get("/projects")
-async def projects(search: str = Query(default=""), show_archived: bool = Query(default=False)):
-    """List Gitea projects (JSON)."""
-    try:
-        repos = await gitea.get_user_repos(page=1, limit=50)
-        if search:
-            q = search.lower()
-            repos = [r for r in repos if q in r.get("full_name", "").lower() or q in (r.get("description") or "").lower()]
-        if not show_archived:
-            repos = [r for r in repos if not r.get("archived", False)]
-        repos.sort(key=lambda r: r.get("updated_at", ""), reverse=True)
-    except Exception:
-        repos = []
-    return {"projects": repos}
-
-
 @router.post("/move")
 async def move_card(
     request: Request,