feat(M5): Plugin-MiniApps — dms, mail, wiki, graph_rag, automation (#363)

- 5 Manifest-Beiträge (MiniAppContribution): dms_folders (dms:read), mail_unread (mail:read), wiki_recent (wiki:read), graph_overview (graph:read), automation_status (automation:read) — je settings_schema max_items, order 60-100
- 5 Frontend-Widgets auf bestehenden API-Clients (keine neuen Backend-Endpoints): DmsFoldersWidget, MailUnreadWidget, WikiRecentWidget, GraphOverviewWidget, AutomationStatusWidget
- MiniAppHost-Registry +5; tsc clean, build OK
- Tests: M5 7/7 (TDD rot->gruen), Backend-Regression 53/53, Vitest 22/22

tests/test_m5_plugin_miniapps.py

@@ -0,0 +1,86 @@
+"""M5 — Plugin-MiniApps tests.
+
+Each business plugin contributes its MiniApps via the manifest
+contribution (same pattern as contacts_stats from M4): dms, mail, wiki,
+graph_rag and automation ship one dashboard app each, wired to the
+plugin's own permission and frontend component.
+"""
+
+from __future__ import annotations
+
+import pytest
+
+
+@pytest.fixture(autouse=True)
+def _fresh_registry():
+    from app.plugins.miniapp_registry import reset_miniapp_registry
+
+    reset_miniapp_registry()
+    yield
+    reset_miniapp_registry()
+
+
+# (plugin_name, app_id, permission, component, order)
+EXPECTED_APPS: list[tuple[str, str, str, str, int]] = [
+    ("dms", "dms_folders", "dms:read", "@/components/dashboard/DmsFoldersWidget", 60),
+    ("mail", "mail_unread", "mail:read", "@/components/dashboard/MailUnreadWidget", 70),
+    ("wiki", "wiki_recent", "wiki:read", "@/components/dashboard/WikiRecentWidget", 80),
+    ("graph_rag", "graph_overview", "graph:read", "@/components/dashboard/GraphOverviewWidget", 90),
+    ("automation", "automation_status", "automation:read", "@/components/dashboard/AutomationStatusWidget", 100),
+]
+
+
+class TestPluginMiniAppContributions:
+    @pytest.mark.parametrize("plugin_name,app_id,permission,component,order", EXPECTED_APPS)
+    def test_manifest_contains_miniapp(
+        self, plugin_name: str, app_id: str, permission: str, component: str, order: int
+    ):
+        """The plugin manifest declares the MiniApp with the right fields."""
+        import importlib
+
+        module = importlib.import_module(f"app.plugins.builtins.{plugin_name}.plugin")
+        plugin_cls = getattr(module, f"{plugin_name.replace('_', '').title().replace('Graphrag', 'GraphRAG')}Plugin")
+        contributions = plugin_cls().manifest.miniapps
+        found = [m for m in contributions if m.app_id == app_id]
+        assert len(found) == 1, f"{plugin_name}: miniapp {app_id} missing"
+        app = found[0]
+        assert app.permission == permission
+        assert app.component == component
+        assert app.order == order
+        assert "dashboard" in app.hosts
+
+    def test_lifecycle_registers_all_plugin_miniapps(self):
+        """BasePlugin._register_manifest_miniapps carries component (M4 fix)
+        for every contributing plugin — all five apps land in the registry."""
+        from app.plugins.miniapp_registry import get_miniapp_registry
+
+        registry = get_miniapp_registry()
+        for plugin_name, app_id, _permission, component, _order in EXPECTED_APPS:
+            import importlib
+
+            module = importlib.import_module(f"app.plugins.builtins.{plugin_name}.plugin")
+            plugin_cls = getattr(
+                module, f"{plugin_name.replace('_', '').title().replace('Graphrag', 'GraphRAG')}Plugin"
+            )
+            plugin_cls()._register_manifest_miniapps()
+
+            app = registry.get_app(app_id)
+            assert app is not None, f"{app_id} not registered"
+            assert app.component == component, f"{app_id}: component lost"
+
+    def test_settings_schemas_present(self):
+        """List-style widgets expose max_items in their settings_schema so the
+        generic settings form (M3) can render it."""
+        import importlib
+
+        for plugin_name, app_id, *_rest in EXPECTED_APPS:
+            module = importlib.import_module(f"app.plugins.builtins.{plugin_name}.plugin")
+            plugin_cls = getattr(
+                module, f"{plugin_name.replace('_', '').title().replace('Graphrag', 'GraphRAG')}Plugin"
+            )
+            contributions = plugin_cls().manifest.miniapps
+            app = next(m for m in contributions if m.app_id == app_id)
+            fields = app.settings_schema.get("fields", [])
+            assert any(f["name"] == "max_items" for f in fields), (
+                f"{app_id}: max_items missing in settings_schema"
+            )