test: A32 phase 2a — library 10/10 + 2 routes fantômes supprimées (v7.12.0)

- tests/test_smoke_uncovered.py : +6 tests pour library.py (1/10 → 8 routes
  couvertes) : les 5 listes en boucle (recents/favorites/published/private/
  workspace → 200 + items), /private avec page seedée retrouvée, /children/{id}
  avec parent/enfant seedés, /repository vide ET clé (string, aucun réseau),
  non-régression 404 sur les routes supprimées.
- DÉCOUVERTE (les smokes l'ont prouvé) : `/api/library/local-workspace-children`
  renvoyait un 500 systématique (test vert → ASGI double response.start) et
  `/api/library/local-workspace` 500 dès qu'un workspace existe — les deux
  lisaient `local_workspace_items`, table AUCUNEMENT créée dans le codebase
  (0 CREATE TABLE) et sans 1 seule référence front. Supprimés avec
  `library._format_size` devenu mort (la copie de dashboard.py est inchangée).
  `local_workspace_items` : 0 occurrence restante dans app/.
- helper `_seed_page` minimal (workspace NOT NULL inclus) + nettoyage en
  finally (pas de pollution des autres tests).

suite **1053/1053** (229 s) · `ruff check app tests` OK · docs à jour
restent phase 2b : api.py 3/23, dashboard.py 17/63, api_v2.py 50/115

docs/openapi-v2.json

@@ -2,7 +2,7 @@
   "openapi": "3.1.0",
   "info": {
     "title": "FlowDeck",
-    "version": "7.11.0"
+    "version": "7.12.0"
   },
   "paths": {
     "/auth/register": {
@@ -10765,47 +10765,6 @@
         }
       }
     },
-    "/api/library/local-workspace-children/{item_id}": {
-      "get": {
-        "tags": [
-          "library"
-        ],
-        "summary": "Library Local Workspace Children",
-        "description": "Return children of a local workspace item for tree expansion.",
-        "operationId": "library_local_workspace_children_api_library_local_workspace_children__item_id__get",
-        "parameters": [
-          {
-            "name": "item_id",
-            "in": "path",
-            "required": true,
-            "schema": {
-              "type": "integer",
-              "title": "Item Id"
-            }
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "Successful Response",
-            "content": {
-              "application/json": {
-                "schema": {}
-              }
-            }
-          },
-          "422": {
-            "description": "Validation Error",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/HTTPValidationError"
-                }
-              }
-            }
-          }
-        }
-      }
-    },
     "/api/library/children/{page_id}": {
       "get": {
         "tags": [
@@ -10899,48 +10858,6 @@
         }
       }
     },
-    "/api/library/local-workspace": {
-      "get": {
-        "tags": [
-          "library"
-        ],
-        "summary": "Library Local Workspace",
-        "description": "Return local workspace items (files/folders) formatted for Library display.",
-        "operationId": "library_local_workspace_api_library_local_workspace_get",
-        "parameters": [
-          {
-            "name": "workspace_id",
-            "in": "query",
-            "required": false,
-            "schema": {
-              "type": "integer",
-              "default": 0,
-              "title": "Workspace Id"
-            }
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "Successful Response",
-            "content": {
-              "application/json": {
-                "schema": {}
-              }
-            }
-          },
-          "422": {
-            "description": "Validation Error",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/HTTPValidationError"
-                }
-              }
-            }
-          }
-        }
-      }
-    },
     "/api/library/workspace": {
       "get": {
         "tags": [