diff --git a/services/platform-service/src/modules/public/routes.test.ts b/services/platform-service/src/modules/public/routes.test.ts
new file mode 100644
index 00000000..737e208c
--- /dev/null
+++ b/services/platform-service/src/modules/public/routes.test.ts
@@ -0,0 +1,189 @@
+/**
+ * Route-level tests for public module — Fastify inject.
+ */
+
+import Fastify from 'fastify';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+
+const itemRepoMock = {
+  list: vi.fn(),
+  getById: vi.fn(),
+  create: vi.fn(),
+  updateVoteCount: vi.fn(),
+};
+
+const voteRepoMock = {
+  create: vi.fn(),
+  getByItemAndUser: vi.fn(),
+  remove: vi.fn(),
+  countByItem: vi.fn(),
+};
+
+vi.mock('../items/repository.js', () => itemRepoMock);
+vi.mock('../votes/repository.js', () => voteRepoMock);
+vi.mock('../../lib/request-context.js', () => ({
+  getRequestProductId: () => 'lysnrai',
+}));
+
+const baseItem = {
+  id: 'item_1',
+  productId: 'lysnrai',
+  type: 'feature',
+  status: 'open',
+  priority: 'medium',
+  title: 'Improve transcription speed',
+  description: 'Improve performance for long audio',
+  labels: [],
+  assignee: null,
+  reportedBy: 'user@example.com',
+  source: 'user_submitted',
+  visibility: 'public',
+  voteCount: 2,
+  commentCount: 0,
+  priorityOrder: 2,
+  targetRelease: null,
+  createdAt: '2026-02-16T00:00:00Z',
+  updatedAt: '2026-02-16T00:00:00Z',
+};
+
+describe('publicRoutes', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it('GET /public/roadmap returns public items', async () => {
+    itemRepoMock.list.mockResolvedValue({ items: [baseItem], total: 1 });
+
+    const { publicRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    await app.register(publicRoutes, { prefix: '/api' });
+
+    const res = await app.inject({ method: 'GET', url: '/api/public/roadmap' });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.items).toHaveLength(1);
+    expect(itemRepoMock.list).toHaveBeenCalled();
+  });
+
+  it('GET /public/roadmap returns 400 for invalid query', async () => {
+    const { publicRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    await app.register(publicRoutes, { prefix: '/api' });
+
+    const res = await app.inject({
+      method: 'GET',
+      url: '/api/public/roadmap?status=invalid',
+    });
+
+    expect(res.statusCode).toBe(400);
+  });
+
+  it('GET /public/roadmap/stats aggregates status/type/votes', async () => {
+    itemRepoMock.list.mockResolvedValue({
+      items: [
+        { ...baseItem, status: 'open', type: 'feature', voteCount: 2 },
+        { ...baseItem, id: 'item_2', status: 'in_progress', type: 'bug', voteCount: 3 },
+      ],
+      total: 2,
+    });
+
+    const { publicRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    await app.register(publicRoutes, { prefix: '/api' });
+
+    const res = await app.inject({ method: 'GET', url: '/api/public/roadmap/stats' });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.total).toBe(2);
+    expect(data.totalVotes).toBe(5);
+    expect(data.byStatus.open).toBe(1);
+    expect(data.byType.feature).toBe(1);
+  });
+
+  it('GET /public/items/:id returns 404 for missing item', async () => {
+    itemRepoMock.getById.mockResolvedValue(null);
+
+    const { publicRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    await app.register(publicRoutes, { prefix: '/api' });
+
+    const res = await app.inject({ method: 'GET', url: '/api/public/items/missing' });
+
+    expect(res.statusCode).toBe(404);
+  });
+
+  it('POST /public/submit creates tracker item and auto-vote', async () => {
+    itemRepoMock.create.mockResolvedValue(baseItem);
+    voteRepoMock.create.mockResolvedValue({ id: 'vote_1' });
+
+    const { publicRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    await app.register(publicRoutes, { prefix: '/api' });
+
+    const res = await app.inject({
+      method: 'POST',
+      url: '/api/public/submit',
+      payload: {
+        type: 'feature',
+        priority: 'medium',
+        title: 'Add hotkey customization',
+        description: 'Need remap support',
+        email: 'submitter@example.com',
+        name: 'Submitter',
+      },
+    });
+
+    expect(res.statusCode).toBe(201);
+    const data = JSON.parse(res.body);
+    expect(data).toHaveProperty('id');
+    expect(voteRepoMock.create).toHaveBeenCalled();
+  });
+
+  it('POST /public/items/:id/vote toggles off when vote exists', async () => {
+    itemRepoMock.getById.mockResolvedValue(baseItem);
+    voteRepoMock.getByItemAndUser.mockResolvedValue({ id: 'vote_1' });
+    voteRepoMock.countByItem.mockResolvedValue(1);
+
+    const { publicRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    await app.register(publicRoutes, { prefix: '/api' });
+
+    const res = await app.inject({
+      method: 'POST',
+      url: '/api/public/items/item_1/vote',
+      payload: { email: 'user@example.com' },
+    });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.voted).toBe(false);
+    expect(voteRepoMock.remove).toHaveBeenCalledWith('vote_1');
+  });
+
+  it('POST /public/items/:id/vote toggles on when vote does not exist', async () => {
+    itemRepoMock.getById.mockResolvedValue(baseItem);
+    voteRepoMock.getByItemAndUser.mockResolvedValue(null);
+    voteRepoMock.countByItem.mockResolvedValue(3);
+
+    const { publicRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    await app.register(publicRoutes, { prefix: '/api' });
+
+    const res = await app.inject({
+      method: 'POST',
+      url: '/api/public/items/item_1/vote',
+      payload: { email: 'user@example.com' },
+    });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.voted).toBe(true);
+    expect(voteRepoMock.create).toHaveBeenCalled();
+  });
+});
diff --git a/services/platform-service/src/modules/settings/routes.test.ts b/services/platform-service/src/modules/settings/routes.test.ts
new file mode 100644
index 00000000..ffbb0a04
--- /dev/null
+++ b/services/platform-service/src/modules/settings/routes.test.ts
@@ -0,0 +1,194 @@
+/**
+ * Route-level tests for settings module — Fastify inject.
+ */
+
+import Fastify from 'fastify';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+
+const repoMock = {
+  getSettingsId: vi.fn((productId: string, userId: string) => `settings_${productId}_${userId}`),
+  getByUserId: vi.fn(),
+  upsert: vi.fn(),
+};
+
+const flagRepoMock = {
+  getByKey: vi.fn(),
+};
+
+vi.mock('./repository.js', () => repoMock);
+vi.mock('../flags/repository.js', () => flagRepoMock);
+vi.mock('../../lib/request-context.js', () => ({
+  getRequestProductId: () => 'lysnrai',
+}));
+
+const now = '2026-02-16T00:00:00.000Z';
+const existingSettings = {
+  id: 'settings_lysnrai_user_1',
+  productId: 'lysnrai',
+  userId: 'user_1',
+  settings: { theme: 'dark', locale: 'en-US' },
+  deviceOverrides: { iphone_1: { theme: 'light' } },
+  createdAt: now,
+  updatedAt: now,
+};
+
+function buildApp(withAuth = true) {
+  return (async () => {
+    const { settingsRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    if (withAuth) {
+      app.addHook('onRequest', async req => {
+        req.jwtPayload = { sub: 'user_1', productId: 'lysnrai' };
+      });
+    }
+    await app.register(settingsRoutes, { prefix: '/api' });
+    return app;
+  })();
+}
+
+describe('settingsRoutes', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it('GET /settings/kill-switch returns enabled when product is missing', async () => {
+    const app = await buildApp();
+    const res = await app.inject({ method: 'GET', url: '/api/settings/kill-switch' });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.enabled).toBe(true);
+    expect(data.disabled).toBe(false);
+  });
+
+  it('GET /settings/kill-switch returns disabled when flag is enabled', async () => {
+    flagRepoMock.getByKey.mockResolvedValue({ enabled: true, description: 'Maintenance' });
+    const app = await buildApp();
+
+    const res = await app.inject({
+      method: 'GET',
+      url: '/api/settings/kill-switch?productId=lysnrai',
+    });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.enabled).toBe(false);
+    expect(data.disabled).toBe(true);
+    expect(data.message).toBe('Maintenance');
+  });
+
+  it('GET /settings returns existing settings', async () => {
+    repoMock.getByUserId.mockResolvedValue(existingSettings);
+    const app = await buildApp();
+
+    const res = await app.inject({ method: 'GET', url: '/api/settings' });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.settings.theme).toBe('dark');
+  });
+
+  it('GET /settings returns default doc when none exists', async () => {
+    repoMock.getByUserId.mockResolvedValue(null);
+    const app = await buildApp();
+
+    const res = await app.inject({ method: 'GET', url: '/api/settings' });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.userId).toBe('user_1');
+    expect(data.settings).toEqual({});
+  });
+
+  it('GET /settings returns 401 without auth', async () => {
+    const app = await buildApp(false);
+    const res = await app.inject({ method: 'GET', url: '/api/settings' });
+    expect(res.statusCode).toBe(401);
+  });
+
+  it('PUT /settings merges global settings', async () => {
+    repoMock.getByUserId.mockResolvedValue(existingSettings);
+    repoMock.upsert.mockResolvedValue({
+      ...existingSettings,
+      settings: { ...existingSettings.settings, locale: 'fr-FR' },
+    });
+    const app = await buildApp();
+
+    const res = await app.inject({
+      method: 'PUT',
+      url: '/api/settings',
+      payload: { settings: { locale: 'fr-FR' } },
+    });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.settings.locale).toBe('fr-FR');
+  });
+
+  it('GET /settings/device/:deviceId resolves merged settings', async () => {
+    repoMock.getByUserId.mockResolvedValue(existingSettings);
+    const app = await buildApp();
+
+    const res = await app.inject({
+      method: 'GET',
+      url: '/api/settings/device/iphone_1',
+    });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.deviceId).toBe('iphone_1');
+    expect(data.hasOverrides).toBe(true);
+    expect(data.settings.theme).toBe('light');
+  });
+
+  it('PUT /settings/device/:deviceId sets overrides', async () => {
+    repoMock.getByUserId.mockResolvedValue(existingSettings);
+    repoMock.upsert.mockResolvedValue(existingSettings);
+    const app = await buildApp();
+
+    const res = await app.inject({
+      method: 'PUT',
+      url: '/api/settings/device/iphone_2',
+      payload: { overrides: { locale: 'es-ES' } },
+    });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.deviceId).toBe('iphone_2');
+    expect(data.overrides.locale).toBe('es-ES');
+  });
+
+  it('DELETE /settings/device/:deviceId returns success when no existing doc', async () => {
+    repoMock.getByUserId.mockResolvedValue(null);
+    const app = await buildApp();
+
+    const res = await app.inject({
+      method: 'DELETE',
+      url: '/api/settings/device/iphone_2',
+    });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.success).toBe(true);
+  });
+
+  it('DELETE /settings/device/:deviceId clears overrides when doc exists', async () => {
+    repoMock.getByUserId.mockResolvedValue(existingSettings);
+    repoMock.upsert.mockResolvedValue({ ...existingSettings, deviceOverrides: {} });
+    const app = await buildApp();
+
+    const res = await app.inject({
+      method: 'DELETE',
+      url: '/api/settings/device/iphone_1',
+    });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.success).toBe(true);
+    expect(data.deviceId).toBe('iphone_1');
+  });
+});
diff --git a/services/platform-service/src/modules/votes/routes.test.ts b/services/platform-service/src/modules/votes/routes.test.ts
new file mode 100644
index 00000000..88f657ca
--- /dev/null
+++ b/services/platform-service/src/modules/votes/routes.test.ts
@@ -0,0 +1,119 @@
+/**
+ * Route-level tests for votes module — Fastify inject.
+ */
+
+import Fastify from 'fastify';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+
+const voteRepoMock = {
+  getByItemAndUser: vi.fn(),
+  create: vi.fn(),
+  remove: vi.fn(),
+  countByItem: vi.fn(),
+  listByItem: vi.fn(),
+};
+
+const itemRepoMock = {
+  getById: vi.fn(),
+  updateVoteCount: vi.fn(),
+};
+
+vi.mock('./repository.js', () => voteRepoMock);
+vi.mock('../items/repository.js', () => itemRepoMock);
+vi.mock('../../lib/auth.js', () => ({
+  extractAuth: vi.fn(async () => ({ sub: 'user_1', role: 'user' })),
+}));
+
+const baseItem = {
+  id: 'item_1',
+  productId: 'lysnrai',
+  title: 'Improve transcription speed',
+  visibility: 'public',
+};
+
+describe('voteRoutes', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it('POST /items/:itemId/vote adds vote when none exists', async () => {
+    itemRepoMock.getById.mockResolvedValue(baseItem);
+    voteRepoMock.getByItemAndUser.mockResolvedValue(null);
+    voteRepoMock.countByItem.mockResolvedValue(3);
+
+    const { voteRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    await app.register(voteRoutes, { prefix: '/api' });
+
+    const res = await app.inject({ method: 'POST', url: '/api/items/item_1/vote' });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.voted).toBe(true);
+    expect(data.voteCount).toBe(3);
+    expect(voteRepoMock.create).toHaveBeenCalled();
+    expect(itemRepoMock.updateVoteCount).toHaveBeenCalledWith('item_1', 3);
+  });
+
+  it('POST /items/:itemId/vote removes vote when existing', async () => {
+    itemRepoMock.getById.mockResolvedValue(baseItem);
+    voteRepoMock.getByItemAndUser.mockResolvedValue({ id: 'vote_1' });
+    voteRepoMock.countByItem.mockResolvedValue(2);
+
+    const { voteRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    await app.register(voteRoutes, { prefix: '/api' });
+
+    const res = await app.inject({ method: 'POST', url: '/api/items/item_1/vote' });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.voted).toBe(false);
+    expect(data.voteCount).toBe(2);
+    expect(voteRepoMock.remove).toHaveBeenCalledWith('vote_1');
+  });
+
+  it('POST /items/:itemId/vote returns 404 when item missing', async () => {
+    itemRepoMock.getById.mockResolvedValue(null);
+
+    const { voteRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    await app.register(voteRoutes, { prefix: '/api' });
+
+    const res = await app.inject({ method: 'POST', url: '/api/items/missing/vote' });
+
+    expect(res.statusCode).toBe(404);
+  });
+
+  it('GET /items/:itemId/votes lists voters', async () => {
+    itemRepoMock.getById.mockResolvedValue(baseItem);
+    voteRepoMock.listByItem.mockResolvedValue([{ id: 'vote_1' }, { id: 'vote_2' }]);
+
+    const { voteRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    await app.register(voteRoutes, { prefix: '/api' });
+
+    const res = await app.inject({ method: 'GET', url: '/api/items/item_1/votes' });
+
+    expect(res.statusCode).toBe(200);
+    const data = JSON.parse(res.body);
+    expect(data.votes).toHaveLength(2);
+    expect(data.count).toBe(2);
+  });
+
+  it('GET /items/:itemId/votes returns 404 when item missing', async () => {
+    itemRepoMock.getById.mockResolvedValue(null);
+
+    const { voteRoutes } = await import('./routes.js');
+    const app = Fastify({ logger: false });
+    await app.register(voteRoutes, { prefix: '/api' });
+
+    const res = await app.inject({ method: 'GET', url: '/api/items/missing/votes' });
+
+    expect(res.statusCode).toBe(404);
+  });
+});