feat(analytics): add daily trend and activity heatmap endpoints, and implement corresponding frontend components

- Added new API endpoints for daily trend data and activity heatmap in analyticsRoutes.ts.
- Created new frontend components: ActivityChart, ControlBar, Heatmap, SummaryCards, TopicList, TrendChart, UserTable, and ViolatorTable for displaying analytics data.
- Implemented loading and empty states in the new components.
- Enhanced the existing moderation tests with remote fallback handling for Indonesian text normalization.

tests/moderation/conversationContext.test.ts

@@ -1,4 +1,18 @@
-import { describe, expect, it } from "vitest";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+vi.mock("../../src/moderation/indonesianTextNormalizer.js", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("../../src/moderation/indonesianTextNormalizer.js")>();
+  return {
+    ...actual,
+    formatModerationTextEvidenceForPrompt: vi.fn(async (content: string) => {
+      // Deterministic mock evidence — length tuned for the "tight budget" test:
+      // maxTokens=300, target ~88, c3 ~108, c2 ~108, c1 ~108
+      // Expectation: target+c3 fits (196), target+c3+c2 overflows (304)
+      return "[text_evidence] categories=[\"offensive\",\"profanity\",\"sexual_violence\"] severity=high confidence=0.92 language=id detected=badword normalized=false metadata_v2=true context=true";
+    }),
+  };
+});
+
 import {
   buildConversationContext,
   estimateTokens,
@@ -6,6 +20,10 @@ import {
 } from "../../src/moderation/conversationContext";
 import type { MessageRecord } from "../../src/moderation/types";
 
+beforeEach(() => {
+  vi.clearAllMocks();
+});
+
 function message(
   id: string,
   content: string,

tests/moderation/indonesianTextNormalizer.remote.test.ts

@@ -0,0 +1,68 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { config } from "../../src/config";
+
+const mocks = vi.hoisted(() => ({
+  axiosPost: vi.fn(),
+  openaiCreate: vi.fn(),
+}));
+
+vi.mock("axios", () => ({
+  default: {
+    post: mocks.axiosPost,
+    isAxiosError: (error: unknown) =>
+      Boolean(
+        error &&
+          typeof error === "object" &&
+          "isAxiosError" in error &&
+          (error as { isAxiosError?: unknown }).isAxiosError,
+      ),
+  },
+}));
+
+vi.mock("openai", () => ({
+  default: class MockOpenAI {
+    chat = {
+      completions: {
+        create: mocks.openaiCreate,
+      },
+    };
+  },
+}));
+
+describe("detectIndonesianBadwords remote fallback", () => {
+  beforeEach(() => {
+    mocks.axiosPost.mockReset();
+    mocks.openaiCreate.mockReset();
+    config.NVIDIA_NEMOTRON_API_KEY = "test-nemotron-key";
+    config.AI_LLM_API_KEY = "test-primary-key";
+  });
+
+  it("falls back to primary AI after Nemotron rate limits and caches the result", async () => {
+    mocks.axiosPost.mockRejectedValue({
+      isAxiosError: true,
+      response: { status: 429 },
+      message: "Too Many Requests",
+    });
+    mocks.openaiCreate.mockResolvedValue({
+      choices: [
+        {
+          message: {
+            content: JSON.stringify({ flags: ["harassment"] }),
+          },
+        },
+      ],
+    });
+
+    const { detectIndonesianBadwords } = await import(
+      "../../src/moderation/indonesianTextNormalizer"
+    );
+
+    const first = await detectIndonesianBadwords("squad jump soalnya");
+    const second = await detectIndonesianBadwords("squad jump soalnya");
+
+    expect(first).toEqual(["harassment"]);
+    expect(second).toEqual(["harassment"]);
+    expect(mocks.axiosPost).toHaveBeenCalledTimes(1);
+    expect(mocks.openaiCreate).toHaveBeenCalledTimes(1);
+  });
+});

tests/moderation/indonesianTextNormalizer.test.ts

@@ -1,4 +1,4 @@
-import { describe, expect, it } from "vitest";
+import { afterAll, afterEach, describe, expect, it } from "vitest";
 import {
   buildModerationTextEvidence,
   detectIndonesianBadwords,
@@ -6,6 +6,26 @@ import {
   normalizeDiscordCustomEmoji,
   normalizeIndonesianSlang,
 } from "../../src/moderation/indonesianTextNormalizer";
+import { config } from "../../src/config";
+
+const originalNemotronKey = config.NVIDIA_NEMOTRON_API_KEY;
+const originalPrimaryAiKey = config.AI_LLM_API_KEY;
+
+function disableRemoteModeration(): void {
+  config.NVIDIA_NEMOTRON_API_KEY = undefined;
+  config.AI_LLM_API_KEY = undefined;
+}
+
+disableRemoteModeration();
+
+afterEach(() => {
+  disableRemoteModeration();
+});
+
+afterAll(() => {
+  config.NVIDIA_NEMOTRON_API_KEY = originalNemotronKey;
+  config.AI_LLM_API_KEY = originalPrimaryAiKey;
+});
 
 describe("normalizeDiscordCustomEmoji", () => {
   it("replaces static custom emoji", () => {