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/permissions.py

@@ -9,7 +9,7 @@ from __future__ import annotations
 
 import logging
 
-from fastapi import APIRouter, HTTPException, Request
+from fastapi import APIRouter, Body, HTTPException, Request
 
 from app.auth.session import SessionManager
 from app.db import get_conn
@@ -197,22 +197,20 @@ def _page_type(page_id: int) -> str:
 
 
 @router.post("/pages/{page_id}/permissions")
-async def grant_page_permission(page_id: int, request: Request):
+def grant_page_permission(page_id: int, request: Request, body: dict = Body(default={})):
     pm = _pm(request)
     if not pm.can_manage_page_permissions(page_id):
         raise HTTPException(403, "Only a page owner can manage its permissions")
-    body = await request.json()
     return _grant_common(request, pm, "page", page_id, body,
                          "page_permissions", "page_id", PAGE_ROLES)
 
 
 @router.post("/pages/{page_id}/permissions/batch")
-async def batch_page_permissions(page_id: int, request: Request):
+def batch_page_permissions(page_id: int, request: Request, body: dict = Body(default={})):
     """Grant several permissions in one call: {grants: [{user_id|group_id, role}, ...]}."""
     pm = _pm(request)
     if not pm.can_manage_page_permissions(page_id):
         raise HTTPException(403, "Only a page owner can manage its permissions")
-    body = await request.json()
     grants = body.get("grants") or []
     if not isinstance(grants, list) or not grants:
         raise HTTPException(400, "grants must be a non-empty list")
@@ -266,11 +264,10 @@ def _collection_type(collection_id: int) -> str:
 
 
 @router.post("/collections/{collection_id}/permissions")
-async def grant_collection_permission(collection_id: int, request: Request):
+def grant_collection_permission(collection_id: int, request: Request, body: dict = Body(default={})):
     pm = _pm(request)
     if not pm.can_manage_collection_permissions(collection_id):
         raise HTTPException(403, "Only a collection owner can manage its permissions")
-    body = await request.json()
     return _grant_common(request, pm, "collection", collection_id, body,
                          "collection_permissions", "collection_id", COLLECTION_ROLES)
 
@@ -331,11 +328,10 @@ def list_property_permissions(collection_id: int, property_id: int, request: Req
 
 
 @router.post("/collections/{collection_id}/properties/{property_id}/permissions")
-async def grant_property_permission(collection_id: int, property_id: int, request: Request):
+def grant_property_permission(collection_id: int, property_id: int, request: Request, body: dict = Body(default={})):
     pm = _pm(request)
     if not pm.can_manage_collection_permissions(collection_id):
         raise HTTPException(403, "Only a collection owner can manage property permissions")
-    body = await request.json()
     with get_conn() as conn:
         prop = conn.execute(
             "SELECT id FROM collection_properties WHERE id=? AND collection_id=?",
@@ -369,9 +365,8 @@ def list_groups(request: Request, workspace_id: int | None = None):
 
 
 @router.post("/groups")
-async def create_group(request: Request):
+def create_group(request: Request, body: dict = Body(default={})):
     pm = _pm(request)
-    body = await request.json()
     ws_id = body.get("workspace_id")
     gid = pm.create_group(ws_id, body.get("name") or "", body.get("description") or "",
                           created_by=pm.user_id)
@@ -382,9 +377,8 @@ async def create_group(request: Request):
 
 
 @router.put("/groups/{group_id}")
-async def update_group(group_id: int, request: Request):
+def update_group(group_id: int, request: Request, body: dict = Body(default={})):
     pm = _pm(request)
-    body = await request.json()
     name = (body.get("name") or "").strip()
     if not name:
         raise HTTPException(400, "name is required")
@@ -428,9 +422,8 @@ def list_group_members(group_id: int, request: Request):
 
 
 @router.post("/groups/{group_id}/members")
-async def add_group_member(group_id: int, request: Request):
+def add_group_member(group_id: int, request: Request, body: dict = Body(default={})):
     pm = _pm(request)
-    body = await request.json()
     user_id = body.get("user_id")
     if not user_id or not isinstance(user_id, int):
         raise HTTPException(400, "user_id is required")