fix: A21 phase 2c — 190 routes hors loop, 86 % total (v7.26.0)

4 passes (283 → 93 routes async sur 667 = 86 % hors loop, avant 61 %) :

A. RACINE AUTH — `get_current_user` (auth/session.py) était `async def`
   SANS aucun await (cookie decode = synchrone) ; idem ses clones :
   `agent._current_user_id/_workspace_id/_current_admin` (34 sites) et
   `sso._require_admin` (corps 0 await, 6 sites) → `def` +
   47 `await` supprimés. Piège : 3 call sites passaient par l'alias `gcu`
   (grep littéral aveugle) — 8 tests en échec → corrigés.

B. Re-scan : 19 routes devenues SANS await → `def` (agent 8, sso 5,
   web_clipper 3, projects 2, auth 1…).

C/D. 155 routes dont les seuls awaits = `request.json()` / événements :
   - try/except `body = {}` → `Body(default={})` (même tolérance)
   - try/except `raise HTTPException(400)` → `Body(...)` REQUIS
     (422 FastAPI — aucun test ne couvrait le 400)
   - forme conditionnelle `request.json() if content-type else {}`
     (54 sites) → défaut `{}` (sans corps = `{}` dans les 2 cas)
   - `await fire_*` → `run_event_sync(...)` ; imports `Body` /
     `run_event_sync` ajoutés aux routers convertis

Reste async (93, justifié) : form/upload/file (22), réseau gitea/llm/oidc,
`_json_body` (9), 2 JSON inline en argument, 1 fallback logique
(capture_frontend_error), 1 lecture conditionnelle (web_clipper), mixtes.

suite **1089/1089** · ruff OK · docs à jour

app/routers/admin.py

@@ -1,5 +1,5 @@
 """FlowDeck — Admin API: users, roles, stats, audit."""
-from fastapi import APIRouter, Depends, HTTPException, Request
+from fastapi import APIRouter, Body, Depends, HTTPException, Request
 from fastapi.responses import JSONResponse
 
 router = APIRouter(tags=["admin"], prefix="/api/admin")
@@ -8,7 +8,7 @@ router = APIRouter(tags=["admin"], prefix="/api/admin")
 # ── Dependency ──
 async def admin_required(request: Request):
     from app.auth.session import get_current_user
-    user = await get_current_user(request)
+    user = get_current_user(request)
     if not user:
         raise HTTPException(status_code=403, detail="Admin access required")
     # Also check DB directly (session cookie may be stale)
@@ -46,15 +46,11 @@ def list_users(_admin=Depends(admin_required)):
 
 
 @router.post("/users")
-async def create_user(request: Request, _admin=Depends(admin_required)):
+def create_user(request: Request, _admin=Depends(admin_required), body: dict = Body(default={})):
     """Create a new user (admin only)."""
 
     from app.db import get_conn
     from app.password_utils import hash_password
-    try:
-        body = await request.json()
-    except Exception:
-        body = {}
     login = body.get("login", "").strip()
     name = body.get("name", login)
     email = body.get("email", login)
@@ -78,15 +74,11 @@ async def create_user(request: Request, _admin=Depends(admin_required)):
 
 
 @router.put("/users/{user_id:int}")
-async def update_user(user_id: int, request: Request, _admin=Depends(admin_required)):
+def update_user(user_id: int, request: Request, _admin=Depends(admin_required), body: dict = Body(default={})):
     """Update a user: name, email, password, admin status, active status."""
 
     from app.db import get_conn
     from app.password_utils import hash_password
-    try:
-        body = await request.json()
-    except Exception:
-        body = {}
     with get_conn() as conn:
         user = conn.execute("SELECT id FROM users WHERE id=?", (user_id,)).fetchone()
         if not user: