feat(analytics): add top tools and topics to session analytics

src/gateway/handlers/handlers.test.ts

@@ -344,12 +344,16 @@ describe('system.sessionAnalytics handler', () => {
     const r = result.result as {
       daily: unknown[];
       topSessions: unknown[];
+      topTools: unknown[];
+      topTopics: unknown[];
       averageMessagesPerSession: number;
       totalSessions: number;
       totalMessages: number;
     };
     expect(r.daily).toEqual([]);
     expect(r.topSessions).toEqual([]);
+    expect(r.topTools).toEqual([]);
+    expect(r.topTopics).toEqual([]);
     expect(r.averageMessagesPerSession).toBe(0);
     expect(r.totalSessions).toBe(0);
     expect(r.totalMessages).toBe(0);
@@ -359,6 +363,8 @@ describe('system.sessionAnalytics handler', () => {
     const getSessionAnalytics = vi.fn(() => ({
       daily: [{ day: '2026-02-16', sessions: 2, messages: 8 }],
       topSessions: [{ sessionId: 'telegram:1', messages: 5, lastActivity: 1708080000 }],
+      topTools: [{ toolName: 'web.search', executions: 4 }],
+      topTopics: [{ topic: 'kubernetes', occurrences: 3 }],
       averageMessagesPerSession: 4,
       totalSessions: 2,
       totalMessages: 8,
@@ -383,6 +389,8 @@ describe('system.sessionAnalytics handler', () => {
     expect(getSessionAnalytics).toHaveBeenCalledWith({ days: 7, topLimit: 5 });
     expect(getPath(result.result, 'totalSessions')).toBe(2);
     expect(getPath(result.result, 'daily')).toEqual([{ day: '2026-02-16', sessions: 2, messages: 8 }]);
+    expect(getPath(result.result, 'topTools')).toEqual([{ toolName: 'web.search', executions: 4 }]);
+    expect(getPath(result.result, 'topTopics')).toEqual([{ topic: 'kubernetes', occurrences: 3 }]);
   });
 });
 

src/gateway/handlers/system.ts

@@ -214,6 +214,8 @@ export function createSystemHandlers(deps: SystemHandlerDeps) {
         return makeResponse(request.id, {
           daily: [],
           topSessions: [],
+          topTools: [],
+          topTopics: [],
           averageMessagesPerSession: 0,
           totalSessions: 0,
           totalMessages: 0,