feat(N4): Restliche Module — Tasks/Kommunikation/Wiki/Reports/Agents/Tags/Search + Navigation + Dashboard-Schnittstelle (#368)

- Scope-Deklarationen: tasks only_mine, kommunikation conversation_ids, wiki category_ids (NEUE contracts.py), report_generator template_ids, automation agent_ids (module_key agents), tags tag_ids, unified_search entity_types dynamisch aus Provider-Registry
- Core-Beiträge: navigation default_route (Startseite) + dashboard widget_app_ids (Widget-TYP-Angebot, Layout bleibt Phase M)
- Backend-Filter (additive UND): /tasks (only_mine), /comm/conversations, /wiki/articles+/categories (Subtree), /reports/print-templates, /agents, /tags, /search GET+POST (entity_types-Schnitt), /miniapps?host=dashboard
- apply_entity_type_scope-Helper (requested ∧ scope)
- Frontend: WorkspaceSwitcher default_route-Navigation, Sidebar workspace-menu_order-Sortierung, workspaceStore moduleMenuOrder()
- Tests: 18/18 Deklarationen + 11/11 Filter (TDD), Frontend 2/2 + Store 18/18, tsc clean, Build OK
- Regression 64 passed (4 Kombi-Failures = Suite-Isolation, solo-bewiesen); Checker 0; Ruff = Vorbestand (Stash-bewiesen)

app/plugins/builtins/tasks/contracts.py

@@ -47,6 +47,27 @@ class TasksContract:
     update_task_status = staticmethod(update_task_status)
     get_due_tasks = staticmethod(get_due_tasks)
 
+    # ─── Workspace Scopes contribution (Phase N4) ───
+
+    @staticmethod
+    def workspace_scopes() -> list[dict]:
+        """Scope-Dimensionen des tasks-Moduls: „nur meine" (Roadmap N4)."""
+        return [
+            {
+                "module_key": "tasks",
+                "dimensions": [
+                    {
+                        "key": "only_mine",
+                        "label": "Nur meine Aufgaben",
+                        "control": "toggle",
+                        "options": [],
+                        "value_source": None,
+                        "default": False,
+                    },
+                ],
+            }
+        ]
+
     # ─── models (read-only for queries) ───
     Task = Task