refactor: A28 lot 2 — dashboard.py (2 735 L) → package 10 fichiers (v7.30.0)

Découpe par concern de l'ancien app/routers/dashboard.py (2 735 lignes,
63 routes) en package `app/routers/dashboard/` :

- 8 modules de routes : local_workspace 559 L (15 r.), pages_html 485 (6),
  account_settings 439 (16), workspace 321 (9), pages_api 240 (6),
  workspaces 131 (6), public 78 (1), account_api 77 (4)
- _common.py (774 L) : les 15 helpers top-level INTERCALÉS dans l'ancien
  fichier + état (logger, _VERSION, WORKSPACE_COOKIE)
- __init__.py : ordre d'enregistrement identique à l'origine, re-export
  complet (7 importateurs inchangés : main, board ×3, my_tasks,
  web_clipper, wiki, sites `_dash._render_blocks_public`, tests) + __all__

Preuve contractuelle : docs/openapi-v2.json régénéré = IDENTIQUE
byte-à-byte (509 chemins, ordre préservé).

Pièges rattrapés :
- segment décorateur sans sa fonction → assert `def in seg` + récupération
  git (corps perdus en silence à la 1ʳᵉ exécution)
- collision `settings` (section vs from app.config import settings →
  hasattr du fromlist) → renommée account_settings
- WORKSPACE_COOKIE utilisé sans import dans workspaces.py (F821)
- script __all__ mangeant la fin du fichier → __init__ réécrit

Reste A28 : collections.py 2 622 L, board.py 2 101 L (lot 3).

suite **1091/1091** · ruff OK · OpenAPI 509 identique · docs à jour

app/routers/dashboard/workspaces.py

@@ -0,0 +1,131 @@
+"""FlowDeck — Dashboard : workspaces.
+
+Découpe A28 de l'ancien app/routers/dashboard.py (2 735 lignes, 63 routes) — un module par concern, contrat inchangé.
+"""
+from __future__ import annotations
+
+import logging
+
+from fastapi import APIRouter, Body, Request
+from fastapi.responses import HTMLResponse, JSONResponse, RedirectResponse
+
+from app.auth.session import SessionManager
+from app.db import get_conn
+
+from ._common import WORKSPACE_COOKIE, _get_active_workspace, _get_user_id, _sidebar_data
+
+logger = logging.getLogger(__name__)
+router = APIRouter(tags=["dashboard"])
+
+
+
+
+@router.get("/workspaces", response_class=HTMLResponse)
+def workspaces_page(request: Request):
+    """Workspaces list page."""
+    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:
+        return RedirectResponse("/auth/login?provider=local&expired=1", status_code=302)
+    ctx = {**sidebar, "user": user}
+    # Pass active workspace for breadcrumb nav menu (null on workspaces home)
+    ws = _get_active_workspace(request, user_id=_get_user_id(request))
+    ctx["nav_workspace_id"] = ws["id"] if ws else 0
+    template = env.get_template("workspaces.html")
+    return template.render(**ctx)
+
+
+
+
+@router.get("/api/workspaces")
+def list_workspaces(request: Request):
+    """List all workspaces for the current user."""
+    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
+    uid = user["id"] if user and user.get("id") else 1
+    with get_conn() as conn:
+        rows = conn.execute(
+            "SELECT w.*, (SELECT COUNT(*) FROM pages WHERE workspace_id=w.id AND collection_row_id IS NULL) as page_count "
+            "FROM workspaces w WHERE w.owner_id=? ORDER BY w.created_at DESC",
+            (uid,),
+        ).fetchall()
+    workspaces = []
+    for r in rows:
+        d = dict(r)
+        workspaces.append(d)
+    active = _get_active_workspace(request, user_id=_get_user_id(request))
+    return {"workspaces": workspaces, "active_id": active["id"] if active else None}
+
+
+
+
+@router.post("/api/workspaces")
+def create_workspace(request: Request, body: dict = Body(default={})):
+    """Create a new workspace."""
+    name = body.get("name", "New Workspace").strip()
+    if not name:
+        return {"error": "Name required"}
+    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
+    uid = user["id"] if user and user.get("id") else 1
+    with get_conn() as conn:
+        # Ensure user exists (FK constraint)
+        uid_ok = conn.execute("SELECT id FROM users WHERE id=?", (uid,)).fetchone()
+        if not uid_ok:
+            conn.execute(
+                "INSERT OR IGNORE INTO users (id, login, full_name, is_admin) VALUES (?, ?, ?, 1)",
+                (uid, user.get("login", "admin") if user else "admin",
+                 user.get("full_name", "Admin") if user else "Admin"),
+            )
+        cursor = conn.execute(
+            "INSERT INTO workspaces (name, owner_id) VALUES (?, ?)",
+            (name, uid),
+        )
+        ws_id = cursor.lastrowid
+        # Add owner as member
+        conn.execute(
+            "INSERT OR IGNORE INTO workspace_members (workspace_id, user_id, role) VALUES (?, ?, 'owner')",
+            (ws_id, uid),
+        )
+        conn.commit()
+    return {"id": ws_id, "name": name}
+
+
+
+
+@router.put("/api/workspaces/{ws_id:int}")
+def rename_workspace(request: Request, ws_id: int, body: dict = Body(default={})):
+    """Rename a workspace."""
+    name = body.get("name", "").strip()
+    if not name:
+        return {"error": "Name required"}
+    with get_conn() as conn:
+        conn.execute("UPDATE workspaces SET name=? WHERE id=?", (name, ws_id))
+        conn.commit()
+    return {"status": "ok"}
+
+
+
+
+@router.delete("/api/workspaces/{ws_id:int}")
+def delete_workspace(request: Request, ws_id: int):
+    """Delete a workspace and all its pages."""
+    with get_conn() as conn:
+        conn.execute("DELETE FROM pages WHERE workspace_id=?", (ws_id,))
+        conn.execute("DELETE FROM workspace_members WHERE workspace_id=?", (ws_id,))
+        conn.execute("DELETE FROM workspaces WHERE id=?", (ws_id,))
+        conn.commit()
+    return {"status": "ok"}
+
+
+
+
+@router.post("/api/workspaces/{ws_id:int}/select")
+def select_workspace(request: Request, ws_id: int):
+    """Set the active workspace via cookie."""
+    response = JSONResponse({"status": "ok", "workspace_id": ws_id})
+    response.set_cookie(WORKSPACE_COOKIE, str(ws_id), max_age=86400 * 30, httponly=True, path="/")
+    return response
+
+
+# ═══════════ Settings Page ═══════════