gateway: add local backend update action

src/gateway/handlers/handlers.test.ts

@@ -244,6 +244,45 @@ describe('system handlers', () => {
     expect(getPath(result.result, 'status', 'activeState')).toBe('active');
   });
 
+  it('system.localBackendControl accepts update action', async () => {
+    const controlLocalBackend = vi.fn(async (): Promise<LocalBackendControlResult> => ({
+      backend: 'ollama',
+      action: 'update',
+      status: {
+        id: 'ollama',
+        provider: 'ollama',
+        name: 'Ollama',
+        unit: 'ollama.service',
+        configured: true,
+        loadState: 'loaded',
+        activeState: 'active',
+        subState: 'running',
+        unitFileState: 'enabled',
+        description: 'Ollama Service',
+        pid: 321,
+        result: 'success',
+        statusText: 'active (running)',
+        availableActions: ['restart', 'stop', 'update'],
+      },
+      message: 'Updated 2 model(s).',
+      updatedModels: ['llama3.2', 'nomic-embed-text'],
+    }));
+    const handlers = createSystemHandlers({
+      ...deps,
+      controlLocalBackend,
+    });
+
+    const req: GatewayRequest = {
+      id: 41,
+      method: 'system.localBackendControl',
+      params: { backend: 'ollama', action: 'update' },
+    };
+    const result = await handlers['system.localBackendControl'](req) as GatewayResponse;
+    expect(controlLocalBackend).toHaveBeenCalledWith('ollama', 'update');
+    expect(getPath(result.result, 'action')).toBe('update');
+    expect(getPath(result.result, 'updatedModels')).toEqual(['llama3.2', 'nomic-embed-text']);
+  });
+
   it('system.presence returns empty result when getPresence is not provided', async () => {
     const req: GatewayRequest = { id: 4, method: 'system.presence' };
     const result = await handlers['system.presence'](req) as GatewayResponse;