diff --git a/CHANGELOG.md b/CHANGELOG.md
index d59a501..6cbd602 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,41 @@
 # Changelog - FlowDeck
 
+## v7.3.1 (2026-09-30) — Audit sécurité P0 : A1–A10
+
+> Corrections du bloc critique de l'audit du 2026-09-30 (ROADMAP) : plus aucune
+> route cookie-auth n'accepte un anonymous, et Jinja2 échappe enfin sa sortie.
+
+### Fixed
+
+- **A1/A2** — deps `pyotp`/`webauthn`/`cbor2` installées, rebinding de
+  `app.config.settings` supprimé dans `test_v54.py` (isolation rétablie) ;
+  cycle v6.8→v7.3 committé + tag `v7.3.0`
+- **A3** — `PUT /api/user/password` : 401 sans session + `current_password`
+  exigé ; helper `_require_user_id()` sur profile/password/token/forge ; `/api/user`
+  sorti de la liste CSRF exemptée
+- **A4** — `POST /api/v1/token` et `POST /api/user/token` : 401 sans session,
+  chemin legacy `user_id=0` supprimé
+- **A5** — CRUD membres d'espace : session + rôle admin de l'espace (ou admin
+  global), placeholder user créé en `is_admin=0`
+- **A6** — `_require_view` → 404 / `_require_edit` → 401 sans session (fin du
+  legacy single-user sur les collections)
+- **A7** — création ET lecture de page → 401 sans session (`PermissionManager`),
+  `/board/api/pages` sorti du CSRF exempt (+ header manquant côté local workspace)
+- **A8** — seed admin sans mot de passe codé en dur : aléatoire au premier boot
+  (loggé une fois) ou `FLOWDECK_ADMIN_PASSWORD`
+- **A9** — `.db`/fichiers de test désindexés + `.gitignore`/`.dockerignore`,
+  rotation de `APP_SECRET_KEY`
+- **A10** — `app/templating.py` : un seul `ENV` avec
+  `autoescape=select_autoescape(["html"])`, 29 instantiations remplacées ;
+  re-tri des `|safe` (corps d'issue + commentaires échappés, `sidebar_config`
+  en `|tojson`)
+
+### Tests
+
+- Client de test connecté par défaut (`_TestSessionAuth` : session + CSRF
+  injectés hors cookie jar) + helper `anon()` sur les 40 tests d'anonymat
+- Suite complète : **1016 passed / 0 failed** · `ruff check app tests` OK
+
 ## v7.3.0 (2026-09-29) — Wiki / Teamspaces + Polish (dernière version du cycle v7)
 
 > Connaissance vérifiée et finition collaborative : teamspaces, badge ✅ avec
diff --git a/ROADMAP.md b/ROADMAP.md
index 572ad1f..d17d1f9 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -1128,7 +1128,7 @@ Quality      DB views,      Agent IA     Palette →       Realtime +          E
 - [x] **A7 — Création de pages sans session, CSRF-exempt** : `POST /board/api/pages` (`board.py:1381-1404`) lit la session mais **ne vérifie jamais `if not user`** (contrairement à `set_page_lock`, `board.py:128-130`), et `/board/api/pages` est exclu du CSRF ; même pattern « No session → legacy single-user behaviour » en lecture `board.py:1420-1424`. *Fix : 401 sans session + sortir `/board/api/pages` de la liste CSRF. Effort : **S**.*
 - [x] **A8 — Mot de passe admin codé en dur, re-seedé à chaque boot** : `app/main.py:80` `hash_password("FlowDeck2026!")` puis `INSERT OR IGNORE ... 'admin' ... is_admin=1` (80-85). Literal commité + scannable + réappliqué si le hash est effacé. *Fix : mot de passe aléatoire au premier boot (affiché une fois) ou `FLOWDECK_ADMIN_PASSWORD` ; ne re-hasher qu'au premier démarrage. Effort : **XS**.*
 - [x] **A9 — DB de prod trackée dans git** : `flowdeck.db` (11 users, e-mails, `password_hash`, 9 sessions actives), `flowdeck_dev.db`, `test-commit.md`, `upload_test.txt` sont dans l'index **et** absents de `.gitignore` **et** de `.dockerignore` → `COPY . .` les embarque dans l'image. *Fix : `git rm --cached` + ajouter `*.db`, `*.db-*`, `test-commit.md`, `upload_test.txt`, `e2e/node_modules/`, `e2e/shots/` à `.gitignore` **et** `.dockerignore` + rotation du `app_secret_key` (les sessions sont révoquées). Effort : **S**.*
-- [ ] **A10 — Jinja2 `autoescape` désactivé partout** : les 29 sites construisent `Environment(loader=FileSystemLoader("app/templates"))` sans `autoescape` (vérifié à l'exécution : `autoescape = False`, jinja2 3.1.6 ; `grep autoescape app/*.py` → 0 hit). Résultat : 326 interpolations `{{ … }}` brutes dans 39 templates, et **tous les `|safe` du codebase sont des no-op**. Pannes concrètes : `notes.html:16,25` (`<textarea>{{ content }}</textarea>` + preview), `public_page.html:7,161` (titre non échappé sur les pages publiques `/s/`), `card_detail.html:48,85` (`issue.body|safe`, `comment.body|safe`), `base.html:140` (nom de page injecté en JS inline → exécution), `base.html:1789` (`innerHTML + item.name` depuis l'arbre Gitea), `base.html:1333` (`safeName` n'échappe que les guillemets, pas `<`/`>`). *Fix **à la racine** : un seul `app/templating.py` avec `ENV = Environment(loader=..., autoescape=select_autoescape(["html"]))`, remplacer les 29 instantiations, puis re-trier les `|safe`. Effort : **M**.*
+- [x] **A10 — Jinja2 `autoescape` désactivé partout** : les 29 sites construisent `Environment(loader=FileSystemLoader("app/templates"))` sans `autoescape` (vérifié à l'exécution : `autoescape = False`, jinja2 3.1.6 ; `grep autoescape app/*.py` → 0 hit). Résultat : 326 interpolations `{{ … }}` brutes dans 39 templates, et **tous les `|safe` du codebase sont des no-op**. Pannes concrètes : `notes.html:16,25` (`<textarea>{{ content }}</textarea>` + preview), `public_page.html:7,161` (titre non échappé sur les pages publiques `/s/`), `card_detail.html:48,85` (`issue.body|safe`, `comment.body|safe`), `base.html:140` (nom de page injecté en JS inline → exécution), `base.html:1789` (`innerHTML + item.name` depuis l'arbre Gitea), `base.html:1333` (`safeName` n'échappe que les guillemets, pas `<`/`>`). *Fix **à la racine** : un seul `app/templating.py` avec `ENV = Environment(loader=..., autoescape=select_autoescape(["html"]))`, remplacer les 29 instantiations, puis re-trier les `|safe`. Effort : **M**.*
 - [ ] **A11 — Path traversal en lecture** : `GET /api/settings/avatar/{filename:path}` (`dashboard.py:1870-1877`) fait `Path("/data/avatars") / filename` puis `FileResponse` **sans `.resolve()` ni `relative_to()`** alors que le bon motif existe 40 lignes plus bas (`dashboard.py:1479-1484`). Le `:path` Starlette accepte les `/`. *Fix : copier la garde de `serve_uploaded_file`. Effort : **XS**.*
 
 ### 🟠 P1 — Hautes
@@ -1185,4 +1185,4 @@ Quality      DB views,      Agent IA     Palette →       Realtime +          E
 → Puis **A3–A8** (le bloc « fallback admin ») d'un seul tenant, puis **A10** (autoescape) qui débloque A18/A20.
 
 *Audit produit le 2026-09-30 · 43 items · aucun code modifié ( ROADMAP seul ).*
-→ **A1–A9 corrigés le 2026-09-30** : deps réinstallées (`pyotp`/`webauthn`/`cbor2`), rebinding de `settings` supprimé dans `test_v54.py` → **suite 1016/1016 verts**, cycle committé (`1706ad1`) + tag `v7.3.0` poussé, `.db`/fichiers de test désindexés, `APP_SECRET_KEY` roté dans `.env` (sessions révoquées) · **A3–A8 : 401 sans session sur les routes de compte (mdp actuel exigé), tokens `/api/v1` + `/api/user` sans session → 401, CRUD membres d'espace sous session+role admin, `_require_view`/`_require_edit` sans session → 404/401, création/lecture de page sous session, `/board/api/pages` + `/api/user` sortis du CSRF exempt, seed admin sans mdp en dur (aléatoire ou `FLOWDECK_ADMIN_PASSWORD`). Tests : client connecte par defaut (`_TestSessionAuth`), helper `anon()` sur les 40 tests d'anonymat → suite 1016/1016 + ruff OK, commit `d125eb3`.**
+→ **A1–A9 corrigés le 2026-09-30** : deps réinstallées (`pyotp`/`webauthn`/`cbor2`), rebinding de `settings` supprimé dans `test_v54.py` → **suite 1016/1016 verts**, cycle committé (`1706ad1`) + tag `v7.3.0` poussé, `.db`/fichiers de test désindexés, `APP_SECRET_KEY` roté dans `.env` (sessions révoquées) · **A3–A8 : 401 sans session sur les routes de compte (mdp actuel exigé), tokens `/api/v1` + `/api/user` sans session → 401, CRUD membres d'espace sous session+role admin, `_require_view`/`_require_edit` sans session → 404/401, création/lecture de page sous session, `/board/api/pages` + `/api/user` sortis du CSRF exempt, seed admin sans mdp en dur (aléatoire ou `FLOWDECK_ADMIN_PASSWORD`). Tests : client connecte par defaut (`_TestSessionAuth`), helper `anon()` sur les 40 tests d'anonymat → suite 1016/1016 + ruff OK, commit `d125eb3` · **A10 : `app/templating.py` (ENV partagé + autoescape `select_autoescape(["html"])`) remplace les 29 instantiations, `|safe` retriés (corps d'issue/commentaires echappes, `sidebar_config` en `|tojson`) → suite 1016/1016, version 7.3.1.**
diff --git a/VERSION b/VERSION
index 1502020..643916c 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-7.3.0
+7.3.1
diff --git a/WORKLOAD.md b/WORKLOAD.md
index 3a880af..b251549 100644
--- a/WORKLOAD.md
+++ b/WORKLOAD.md
@@ -1,6 +1,6 @@
 # WORKLOAD — FlowDeck Notion Clone
 
-> **Début**: 2026-07-08 | **Version**: v7.3.0 (cycle v7 — versions v6.8→v7.3 livrées) | **Statut**: EN COURS 🔄
+> **Début**: 2026-07-08 | **Version**: v7.3.1 (audit sécurité P0 A1–A10) | **Statut**: EN COURS 🔄
 > **Cible**: parité Notion + intégration forge · **Follow-ups v7.3 livrés**: sidebar teamspaces, notif `page.updated`, charts `number` + dashboards multi-DB, unfurl forge, UI Settings → Audit — voir `ROADMAP.md § v7.3.0`
 
 ## Avancement Global
diff --git a/app/main.py b/app/main.py
index 4c8238c..4b60774 100644
--- a/app/main.py
+++ b/app/main.py
@@ -153,7 +153,7 @@ async def lifespan(_app: FastAPI):
 
 app = FastAPI(
     title="FlowDeck",
-    version="7.3.0",
+    version="7.3.1",
     docs_url="/docs",
     redoc_url="/redoc",
     lifespan=lifespan,
diff --git a/app/routers/api.py b/app/routers/api.py
index 1d5cdaf..9947952 100644
--- a/app/routers/api.py
+++ b/app/routers/api.py
@@ -440,8 +440,8 @@ async def get_issue_detail(owner: str, repo: str, issue_id: int, format: str = Q
             "comments": comments,
             "checklists": checklists,
         }
-        from jinja2 import Environment, FileSystemLoader
-        env = Environment(loader=FileSystemLoader("app/templates"))
+        from app.templating import ENV
+        env = ENV
         template = env.get_template("card_detail.html")
         return HTMLResponse(template.render(**ctx))
 
diff --git a/app/routers/board.py b/app/routers/board.py
index addc860..5d11b71 100644
--- a/app/routers/board.py
+++ b/app/routers/board.py
@@ -804,7 +804,7 @@ def _sidebar_data(request: Request, owner: str = "", repo: str = "") -> dict:
             "has_active_workspace": has_active_workspace,
             "app_version": _get_app_version(),
             "local_workspaces": _local_workspaces_for_user(user),
-            "sidebar_config": json.dumps(get_sidebar_config_sync(uid))}
+            "sidebar_config": get_sidebar_config_sync(uid)}
 
 
 def _extract_ai_keywords(owner: str, repo: str, labels: list[dict], body: str = ""):
@@ -908,8 +908,8 @@ def _apply_sorts(cards: list[dict], sorts: str) -> list[dict]:
 @router.get("/library", response_class=HTMLResponse)
 async def library_page(request: Request, owner: str = Query(default=""), repo: str = Query(default="")):
     """Library page avec onglets Recents, Favorites, Shared, Private — scopé au workspace."""
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     sidebar = _sidebar_data(request, owner, repo)
     # Load all pages for the workspace from DB
     ws_key = f"{owner}/{repo}" if owner and repo else ""
@@ -1084,8 +1084,8 @@ async def permanent_delete(request: Request, page_id: int):
 
 @router.get("/trash", response_class=HTMLResponse)
 async def trash_page(request: Request):
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     template = env.get_template("trash.html")
     return template.render(**_sidebar_data(request))
 
@@ -1213,8 +1213,8 @@ async def get_page_synced_refs(request: Request, page_id: int):
 
 @router.get("/{owner}/{repo}", response_class=HTMLResponse)
 async def board(request: Request, owner: str, repo: str, view: str = Query(default="")):
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     sidebar = _sidebar_data(request, owner, repo)
     template = env.get_template("board.html")
     return template.render(request=request, owner=owner, repo=repo, groups=[],
@@ -1240,8 +1240,8 @@ async def board_view(
         logger.error("Board view error: %s", e)
         cards = []
 
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
 
     # Dynamic groups from Gitea labels (fallback to hardcoded)
     group_names = ["Design", "Engineering", "No Team"]
@@ -2047,8 +2047,8 @@ async def view_page(request: Request, page_id: int):
     """Render a page as HTML, or a file viewer for uploaded files.
     ?embed=1 — minimal mode for side peek (editor only, no header)."""
     embed = request.query_params.get("embed") == "1"
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     # v6.0.0: granular page permissions — hide restricted pages (404).
     user_hdr = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
     if user_hdr and user_hdr.get("id") and not PermissionManager(user_hdr["id"]).can_view_page(page_id):
diff --git a/app/routers/dashboard.py b/app/routers/dashboard.py
index a9d6f3c..164ea53 100644
--- a/app/routers/dashboard.py
+++ b/app/routers/dashboard.py
@@ -252,10 +252,9 @@ def _sidebar_data(request: Request, repos: list[dict], include_workspace: bool =
 @router.get("/trash", response_class=HTMLResponse)
 async def trash_page(request: Request, owner: str = Query(default=""), repo: str = Query(default="")):
     """Trash page — scoped to workspace if owner/repo provided."""
-    from jinja2 import Environment, FileSystemLoader
-
     from app.routers.board import _sidebar_data as board_sidebar
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     sidebar = board_sidebar(request, owner, repo)
     with get_conn() as conn:
         ws_key = f"{owner}/{repo}" if owner and repo else ""
@@ -283,10 +282,9 @@ async def library_page(request: Request, owner: str = Query(default=""), repo: s
 
     Sidebar data is kept intact. Tab content is loaded client-side via /api/library/* endpoints.
     """
-    from jinja2 import Environment, FileSystemLoader
-
     from app.routers.board import _sidebar_data as board_sidebar
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     sidebar = board_sidebar(request, owner, repo)
     # Pass active workspace for breadcrumb nav menu
     ws_key_ws = f"{owner}/{repo}" if owner and repo else ""
@@ -312,10 +310,9 @@ async def view_page_root(request: Request, page_id: int):
     """Render a Markdown page at root level with workspace context — or file viewer.
     ?embed=1 — minimal mode for side peek (editor only, no header)."""
     embed = request.query_params.get("embed") == "1"
-    from jinja2 import Environment, FileSystemLoader
-
     from app.routers.board import _sidebar_data as board_sidebar
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     with get_conn() as conn:
         row = conn.execute("SELECT * FROM pages WHERE id=?", (page_id,)).fetchone()
         if not row:
@@ -437,8 +434,8 @@ async def view_page_root(request: Request, page_id: int):
 @router.get("/accounts", response_class=HTMLResponse)
 async def accounts_page(request: Request):
     """Account management panel."""
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     sidebar = _sidebar_data(request, [])
     user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
     with get_conn() as conn:
@@ -451,8 +448,8 @@ async def accounts_page(request: Request):
 @router.get("/help", response_class=HTMLResponse)
 async def help_page(request: Request):
     """Comprehensive help & documentation page."""
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     sidebar = _sidebar_data(request, [])
     # Render via a block-based template so content_html lands in {% block content %}
     block_tpl = env.from_string(
@@ -656,8 +653,8 @@ favorites, tags, sharing, sprints and templates; pagination (<code>?limit=&amp;o
 @router.get("/accounts/settings", response_class=HTMLResponse)
 async def settings_page(request: Request):
     """User settings page — profile, forges, tokens."""
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     sidebar = _sidebar_data(request, [])
     user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
     if not user:
@@ -769,14 +766,14 @@ async def dashboard(
             with get_conn() as conn:
                 count = conn.execute("SELECT COUNT(*) FROM users").fetchone()[0]
                 if count == 0:
-                    from jinja2 import Environment, FileSystemLoader
-                    env = Environment(loader=FileSystemLoader("app/templates"))
+                    from app.templating import ENV
+                    env = ENV
                     template = env.get_template("landing.html")
                     return template.render()
         except Exception:
             pass
-        from jinja2 import Environment, FileSystemLoader
-        env = Environment(loader=FileSystemLoader("app/templates"))
+        from app.templating import ENV
+        env = ENV
         template = env.get_template("landing.html")
         return template.render()
 
@@ -821,8 +818,8 @@ async def dashboard(
         logger.error("Dashboard error: %s", e)
         repos = []
 
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     sidebar = _sidebar_data(request, repos)
     template = env.get_template("dashboard.html")
     return template.render(request=request, repos=repos, search=search,
@@ -834,8 +831,8 @@ async def dashboard(
 @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"))
+    from app.templating import ENV
+    env = ENV
     sidebar = _sidebar_data(request, [])
     user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
     if not user:
@@ -853,8 +850,8 @@ async def gitea_workspace_page(request: Request):
     """Gitea workspace — browse repo files."""
     import json
 
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     sidebar = _sidebar_data(request, [])
     user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
     if not user:
@@ -1030,8 +1027,8 @@ async def local_workspace_page(request: Request, folder: int = None):
 
     If ?folder=ID is provided, shows that folder's contents with breadcrumb.
     """
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     sidebar = _sidebar_data(request, [])
     user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
     if not user:
@@ -1735,8 +1732,8 @@ def _get_active_workspace(request: Request, user_id: int = None) -> dict | None:
 @router.get("/workspaces", response_class=HTMLResponse)
 async def workspaces_page(request: Request):
     """Workspaces list page."""
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     sidebar = _sidebar_data(request, [], include_workspace=False)
     user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
     if not user:
@@ -1838,8 +1835,8 @@ async def select_workspace(request: Request, ws_id: int):
 @router.get("/settings", response_class=HTMLResponse)
 async def app_settings_page(request: Request):
     """Settings & configuration page."""
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     sidebar = _sidebar_data(request, [])
     user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
     if not user:
@@ -2156,9 +2153,8 @@ async def sidebar_workspace_tree(request: Request):
     Called by appState().refreshSidebarTree() after CRUD operations
     in the main content area to keep the sidebar in sync.
     """
-    from jinja2 import Environment, FileSystemLoader
-
     from app.routers.board import _load_workspace_pages
+    from app.templating import ENV
 
     user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
     if not user:
@@ -2194,7 +2190,7 @@ async def sidebar_workspace_tree(request: Request):
             )
 
         # Render the tree using the extracted macro
-        env = Environment(loader=FileSystemLoader("app/templates"))
+        env = ENV
         template = env.from_string(
             "{% from '_workspace_tree_macro.html' import render_workspace_tree %}"
             "{{ render_workspace_tree(pages) }}"
@@ -2215,7 +2211,7 @@ async def sidebar_workspace_tree(request: Request):
 @router.get("/p/{slug}", response_class=HTMLResponse)
 async def public_published_page(request: Request, slug: str):
     """Serve a published page at /p/<slug> — no auth required."""
-    from jinja2 import Environment, FileSystemLoader
+    from app.templating import ENV
 
     with get_conn() as conn:
         row = conn.execute(
@@ -2235,7 +2231,7 @@ h1{font-size:3rem;opacity:.3}</style></head><body><h1>404</h1></body></html>""",
         )
 
     page = dict(row)
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    env = ENV
 
     # Convert blocks to HTML for rendering
     content_html = ""
diff --git a/app/routers/imports.py b/app/routers/imports.py
index c676478..1c7ed5b 100644
--- a/app/routers/imports.py
+++ b/app/routers/imports.py
@@ -44,9 +44,9 @@ async def import_page(request: Request):
     user = _current_user(request)
     if not user:
         return RedirectResponse("/auth/login?provider=local", status_code=302)
-    from jinja2 import Environment, FileSystemLoader
+    from app.templating import ENV
 
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    env = ENV
     return HTMLResponse(content=env.get_template("import.html").render(user=user))
 
 
diff --git a/app/routers/my_tasks.py b/app/routers/my_tasks.py
index 1e69986..35e6ab3 100644
--- a/app/routers/my_tasks.py
+++ b/app/routers/my_tasks.py
@@ -6,10 +6,10 @@ import logging
 
 from fastapi import APIRouter, Request
 from fastapi.responses import HTMLResponse
-from jinja2 import Environment, FileSystemLoader
 
 from app.auth.session import SessionManager
 from app.db import get_conn
+from app.templating import ENV
 
 logger = logging.getLogger(__name__)
 router = APIRouter(tags=["my-tasks"], prefix="/my-tasks")
@@ -102,7 +102,7 @@ async def my_tasks_dashboard(request: Request, view: str = "all", days: int = 7)
 </div>"""
 
     from app.routers.dashboard import _sidebar_data
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    env = ENV
     sidebar = _sidebar_data(request, [])
     block_tpl = env.from_string(
         '{% extends "base.html" %}{% block content %}{{ content_html|safe }}{% endblock %}'
diff --git a/app/routers/notes.py b/app/routers/notes.py
index 34517ee..ef2517a 100644
--- a/app/routers/notes.py
+++ b/app/routers/notes.py
@@ -21,10 +21,9 @@ async def get_notes(request: Request, owner: str, repo: str):
         ).fetchone()
     content = row["content"] if row else ""
 
-    from jinja2 import Environment, FileSystemLoader
-
     from app.auth.session import SessionManager
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
     template = env.get_template("notes.html")
     return template.render(request=request, owner=owner, repo=repo, content=content, user=user)
@@ -45,10 +44,9 @@ async def save_notes(request: Request, owner: str, repo: str):
         )
         conn.commit()
 
-    from jinja2 import Environment, FileSystemLoader
-
     from app.auth.session import SessionManager
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
     template = env.get_template("notes.html")
     return template.render(request=request, owner=owner, repo=repo, content=content, user=user)
diff --git a/app/routers/onboarding.py b/app/routers/onboarding.py
index aaefe6c..d345751 100644
--- a/app/routers/onboarding.py
+++ b/app/routers/onboarding.py
@@ -41,8 +41,8 @@ async def onboarding_page(request: Request):
     if ws_count > 0:
         return RedirectResponse("/workspaces", status_code=302)
 
-    from jinja2 import Environment, FileSystemLoader
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    from app.templating import ENV
+    env = ENV
     template = env.get_template("welcome.html")
     return HTMLResponse(content=template.render(
         user=user,
diff --git a/app/routers/web_clipper.py b/app/routers/web_clipper.py
index d1182cc..938babe 100644
--- a/app/routers/web_clipper.py
+++ b/app/routers/web_clipper.py
@@ -228,11 +228,10 @@ async def revoke_extension_device(device_id: int, request: Request):
 
 @router.get("/extensions", response_class=HTMLResponse)
 async def extensions_page(request: Request):
-    from jinja2 import Environment, FileSystemLoader
-
     from app.routers.dashboard import _sidebar_data
+    from app.templating import ENV
 
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    env = ENV
     try:
         sidebar = _sidebar_data(request, [])
     except Exception:
diff --git a/app/routers/wiki.py b/app/routers/wiki.py
index 0c809e3..9abcc56 100644
--- a/app/routers/wiki.py
+++ b/app/routers/wiki.py
@@ -9,13 +9,13 @@ import html
 
 from fastapi import APIRouter, HTTPException, Request
 from fastapi.responses import HTMLResponse, JSONResponse
-from jinja2 import Environment, FileSystemLoader
 
 from app.auth.session import SessionManager
 from app.db import get_conn
 from app.services import wiki
 from app.services.api_v2_helpers import audit_log
 from app.services.notifications import create_notification
+from app.templating import ENV
 
 router = APIRouter(tags=["wiki"])
 
@@ -156,7 +156,7 @@ async def teamspace_page(teamspace_id: int, request: Request):
 .ts-row:hover{{background:var(--bg-hover);}}
 </style>"""
     from app.routers.dashboard import _sidebar_data
-    env = Environment(loader=FileSystemLoader("app/templates"))
+    env = ENV
     sidebar = _sidebar_data(request, [])
     block_tpl = env.from_string(
         '{% extends "base.html" %}{% block content %}{{ content_html|safe }}{% endblock %}'
diff --git a/app/templates/base.html b/app/templates/base.html
index 6a56579..4676747 100644
--- a/app/templates/base.html
+++ b/app/templates/base.html
@@ -1370,7 +1370,7 @@
       loadSidebarConfig() {
         var self = this;
         try {
-          var raw = {{ sidebar_config|default('{}')|safe }};
+          var raw = {{ sidebar_config|default({})|tojson }};
           if (raw && raw.config) {
             self.sidebarConfig = raw.config;
           } else if (typeof raw === 'object') {
diff --git a/app/templates/card_detail.html b/app/templates/card_detail.html
index e8ba311..9e4f9de 100644
--- a/app/templates/card_detail.html
+++ b/app/templates/card_detail.html
@@ -45,7 +45,7 @@
   <div style="margin-bottom:16px; padding:12px; background:var(--bg-secondary); border-radius:6px; min-height:60px;"
        contenteditable="true"
        @blur="updateField('body', $event.target.innerHTML)">
-    {{ issue.body|safe if issue.body else '<span style="color:var(--text-dim);">Add description...</span>' }}
+    {% if issue.body %}{{ issue.body }}{% else %}<span style="color:var(--text-dim);">Add description...</span>{% endif %}
   </div>
 
   <!-- Checklists -->
@@ -82,7 +82,7 @@
           <span class="text-dim" style="font-weight:400;">· {{ comment.created_at[:10] }}</span>
         </div>
         <div style="font-size:13px; color:var(--text-primary); line-height:1.5;">
-          {{ comment.body|safe }}
+          {{ comment.body }}
         </div>
       </div>
     </div>
diff --git a/app/templating.py b/app/templating.py
new file mode 100644
index 0000000..9686d67
--- /dev/null
+++ b/app/templating.py
@@ -0,0 +1,14 @@
+"""Environment Jinja2 partagé (A10 : autoescape activé partout).
+
+Une seule instance au lieu de 29 `Environment(loader=FileSystemLoader(...))`
+sans autoescape — 326 interpolations `{{ … }}` étaient servies crues et tous
+les `|safe` du codebase étaient des no-op.
+"""
+from __future__ import annotations
+
+from jinja2 import Environment, FileSystemLoader, select_autoescape
+
+ENV = Environment(
+    loader=FileSystemLoader("app/templates"),
+    autoescape=select_autoescape(["html"]),
+)