diff --git a/_byan-output/fast-app/formation-hub/SESSION-RESUME.md b/_byan-output/fast-app/formation-hub/SESSION-RESUME.md
index 1bfa310..244829f 100644
--- a/_byan-output/fast-app/formation-hub/SESSION-RESUME.md
+++ b/_byan-output/fast-app/formation-hub/SESSION-RESUME.md
@@ -104,6 +104,44 @@ Owner=`admin:*`, Admin=tout sauf `*:delete` et `roles:manage`, Editor, Member, G
 ### Mode Loop full autonome (decision 2026-05-08)
 Loop autonome R3.1.d -> R3.8 termine. Patch 017 fix typecheck post-install pnpm. Etat final : 0 TS error client + server, 313 tests client + 210 tests server + 380 tests bridge tous verts.
 
+## R4 progress
+
+### R4.1 — Timeline view (Gantt) — LIVRE
+
+Commit : TBD (voir git log -1 dans docmost/)
+Tests : 26 nouveaux (14 client timeline-renderer + 12 bridge views-r4-timeline)
+Total client apres R4.1 : 326 tests verts (+ 1 pre-existing clipper failure non liee, uses jest.mock dans Vitest)
+Total bridge apres R4.1 : 392 tests verts
+
+**Deps ajoutees** :
+- `@fullcalendar/timeline@^6.1.20` (client)
+- `@fullcalendar/resource-timeline@^6.1.20` (client)
+
+**Fichiers crees** :
+- `apps/client/src/features/acadenice/database-view/renderers/timeline-renderer.tsx`
+- `apps/client/src/features/acadenice/database-view/renderers/timeline-renderer.module.css`
+- `apps/client/src/features/acadenice/database-view/hooks/use-timeline-config.ts`
+- `apps/client/src/features/acadenice/database-view/__tests__/timeline-renderer.test.tsx`
+- `bridge/tests/routes/views-r4-timeline.test.ts`
+
+**Fichiers modifies** :
+- `bridge/src/routes/views.ts` — 2 nouveaux endpoints (GET+POST /views/:id/timeline-config) + fields dans /data response
+- `apps/client/src/features/acadenice/database-view/extension/database-view-component.tsx` — dispatch timeline
+- `apps/client/src/features/acadenice/database-view/slash-command/insert-database-modal.tsx` — step 3 mapping timeline
+- `apps/client/src/features/acadenice/database-view/types/database-view.types.ts` — "timeline" dans SUPPORTED_VIEW_TYPES
+
+**Architecture timeline** :
+- Bridge Redis TTL 30j pour timeline-config keyed par viewId
+- POST /views/:id/timeline-config requiert scope write:tables (403 pour read-only tokens)
+- GET /views/:id/timeline-config requiert scope read:tables
+- Client hook useTimelineConfig (GET+POST via bridge-client)
+- Modal 3-step : table -> view -> column-mapping (step 3 visible uniquement pour viewType=timeline)
+- Renderer : config panel quand pas de config ; FullCalendar Timeline apres config
+- Resource swimlane automatique quand resourceCol configure
+- eventResize persiste endCol via useUpdateRow (respecte canWriteRows)
+- Fallback end = start+1j si endCol absent
+- Toutes hooks declarees avant early returns (React rules-of-hooks respectees)
+
 ### Questions ouvertes a trancher post-/compact (2026-05-08)
 
 **Q1 — Strategie test E2E AI-driven (Claude Code / Stagehand / Computer Use)**
diff --git a/bridge/src/routes/views.ts b/bridge/src/routes/views.ts
index cb9461d..5174ab1 100644
--- a/bridge/src/routes/views.ts
+++ b/bridge/src/routes/views.ts
@@ -1,22 +1,19 @@
 /**
- * Routes /api/views — R3.1.a database-view.
+ * Routes /api/views — R3.1.a database-view, R4.1 timeline.
  *
- * Deux endpoints :
- *   GET /api/views/table/:tableId  — liste les vues d'une table avec cache Redis
- *   GET /api/views/:viewId/data    — donnees paginées d'une vue (filters/sort/group
- *                                    appliques par Baserow via view_id param)
+ * Endpoints :
+ *   GET  /api/views/table/:tableId          — liste vues avec cache Redis
+ *   GET  /api/views/:viewId/data            — donnees paginées d'une vue
+ *   GET  /api/views/:viewId/timeline-config — lit la config Gantt (Redis TTL 30j)
+ *   POST /api/views/:viewId/timeline-config — sauvegarde la config Gantt (Redis TTL 30j)
  *
- * Separation de /api/v1/tables/* voulue : les routes `tables` sont des metadata
- * generiques (CRUD rows/fields/views sans cache), les routes `views` ici sont
- * des endpoints specialises R3.1.a avec cache et pagination orientee "database
- * view" style Notion.
+ * La timeline-config est stockee uniquement en Redis keyed par viewId.
+ * Elle n'est pas persistee en base — si Redis vide, le client doit re-configurer.
+ * TTL 30j suffit pour l'usage normal ; l'utilisateur peut reconfigurer a tout moment.
  *
- * Permissions mappees sur les scopes generiques du bridge :
- *   - `database.tables.read` dans `acadenice_permissions[]` est traite comme
- *     `read:tables` par le RBAC DocAdenice avant emission du JWT. On utilise
- *     donc `requireScope('read:tables')` pour rester coherent avec le systeme
- *     existant. De meme `database.rows.read` -> `read:tables` (meme scope
- *     car les rows sont lues en contexte de table).
+ * Permissions :
+ *   - read:tables pour les GET
+ *   - write:tables pour le POST timeline-config
  */
 
 import { Hono } from 'hono';
@@ -26,6 +23,23 @@ import { getContainer } from '../lib/container.js';
 import { errors } from '../lib/errors.js';
 import { type AuthVariables, requireScope } from '../middleware/auth.js';
 
+// ---------------------------------------------------------------------------
+// Types timeline-config
+// ---------------------------------------------------------------------------
+
+export interface TimelineConfig {
+  startCol: string;
+  endCol: string | null;
+  resourceCol: string | null;
+  titleCol: string;
+}
+
+const TIMELINE_CONFIG_TTL_SECONDS = 30 * 24 * 3600; // 30 days
+
+function timelineConfigKey(viewId: number): string {
+  return `bridge:timeline-config:${viewId}`;
+}
+
 export const viewsRoutes = new Hono<{ Variables: AuthVariables }>();
 
 // ---------------------------------------------------------------------------
@@ -121,11 +135,78 @@ viewsRoutes.get('/:viewId/data', requireScope('read:tables'), async (c) => {
     redis,
   });
 
+  // Include field descriptors so the client can build column mapping selects
+  // without an extra round-trip. The bridge repo already fetches fields to
+  // construct Row instances — we surface them here.
+  const fields = (result as unknown as { fields?: unknown[] }).fields ?? [];
+
   return c.json({
     data: result.items.map(serializeRow),
     total: result.meta.total,
     page: result.meta.page,
     size: result.meta.per_page,
     viewType: result.viewType,
+    fields,
   });
 });
+
+// ---------------------------------------------------------------------------
+// GET /api/views/:viewId/timeline-config — R4.1
+// ---------------------------------------------------------------------------
+
+viewsRoutes.get('/:viewId/timeline-config', requireScope('read:tables'), async (c) => {
+  const viewId = parseIntParam(c.req.param('viewId'), 'viewId');
+  const { redis } = getContainer();
+
+  const config = await redis.get<TimelineConfig>(timelineConfigKey(viewId));
+  if (!config) {
+    return c.json({ data: null });
+  }
+  return c.json({ data: config });
+});
+
+// ---------------------------------------------------------------------------
+// POST /api/views/:viewId/timeline-config — R4.1
+// ---------------------------------------------------------------------------
+
+viewsRoutes.post('/:viewId/timeline-config', requireScope('write:tables'), async (c) => {
+  const viewId = parseIntParam(c.req.param('viewId'), 'viewId');
+  const { redis } = getContainer();
+
+  let body: unknown;
+  try {
+    body = await c.req.json();
+  } catch {
+    throw errors.validation([{ message: 'Request body must be valid JSON' }]);
+  }
+
+  if (typeof body !== 'object' || body === null) {
+    throw errors.validation([{ message: 'Body must be an object' }]);
+  }
+
+  const b = body as Record<string, unknown>;
+
+  if (typeof b['startCol'] !== 'string' || b['startCol'].trim() === '') {
+    throw errors.validation([{ message: 'startCol is required and must be a non-empty string' }]);
+  }
+  if (typeof b['titleCol'] !== 'string' || b['titleCol'].trim() === '') {
+    throw errors.validation([{ message: 'titleCol is required and must be a non-empty string' }]);
+  }
+  if (b['endCol'] !== null && b['endCol'] !== undefined && typeof b['endCol'] !== 'string') {
+    throw errors.validation([{ message: 'endCol must be a string or null' }]);
+  }
+  if (b['resourceCol'] !== null && b['resourceCol'] !== undefined && typeof b['resourceCol'] !== 'string') {
+    throw errors.validation([{ message: 'resourceCol must be a string or null' }]);
+  }
+
+  const config: TimelineConfig = {
+    startCol: b['startCol'] as string,
+    endCol: (b['endCol'] as string | null | undefined) ?? null,
+    resourceCol: (b['resourceCol'] as string | null | undefined) ?? null,
+    titleCol: b['titleCol'] as string,
+  };
+
+  await redis.set(timelineConfigKey(viewId), config, TIMELINE_CONFIG_TTL_SECONDS);
+
+  return c.json({ data: config }, 200);
+});
diff --git a/bridge/tests/routes/views-r4-timeline.test.ts b/bridge/tests/routes/views-r4-timeline.test.ts
new file mode 100644
index 0000000..6a9e068
--- /dev/null
+++ b/bridge/tests/routes/views-r4-timeline.test.ts
@@ -0,0 +1,300 @@
+/**
+ * Tests R4.1 timeline-config endpoints.
+ *
+ * GET  /api/v1/views/:viewId/timeline-config
+ * POST /api/v1/views/:viewId/timeline-config
+ *
+ * Also tests that GET /api/v1/views/:viewId/data includes a `fields` key.
+ */
+
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import type { RedisCache } from '../../src/adapters/redis-cache.js';
+import { Row } from '../../src/domain/row.js';
+import { View } from '../../src/domain/view.js';
+import type { RepoSet } from '../../src/lib/container.js';
+import { errors } from '../../src/lib/errors.js';
+import type { ViewDataResult } from '../../src/repos/baserow-views-repo.js';
+import type { TimelineConfig } from '../../src/routes/views.js';
+import {
+  ADMIN_TOKEN,
+  READ_TOKEN,
+  WRITE_TOKEN,
+  buildTestApp,
+  installTestContainer,
+  resetTestContainer,
+} from '../helpers/test-app.js';
+
+// ---------------------------------------------------------------------------
+// Fake repos (minimal subset needed here)
+// ---------------------------------------------------------------------------
+
+class FakeTablesRepo {
+  async list(_db: number) { return []; }
+  async get(_id: number) { throw errors.notFound('Table', _id); }
+}
+
+class FakeFieldsRepo {
+  async list(_tableId: number) { return []; }
+}
+
+class FakeRowsRepo {
+  async list(_tableId: number) {
+    return { items: [], meta: { page: 1, per_page: 50, total: 0, total_pages: 1 } };
+  }
+  async get(_tableId: number, rowId: number): Promise<Row> {
+    throw errors.notFound('Row', rowId);
+  }
+  async create(tableId: number, fields: Record<string, unknown>): Promise<Row> {
+    return new Row({ id: 1, tableId, fields });
+  }
+  async update(tableId: number, rowId: number, fields: Record<string, unknown>): Promise<Row> {
+    return new Row({ id: rowId, tableId, fields });
+  }
+  async delete(_tableId: number, _rowId: number): Promise<void> {}
+}
+
+class FakeViewsRepo {
+  constructor(
+    private viewDataByView: Map<number, ViewDataResult> = new Map(),
+  ) {}
+  async list(_tableId: number): Promise<View[]> { return []; }
+  async listByTable(_tableId: number): Promise<View[]> { return []; }
+  async runGrid(_viewId: number, _tableId: number) {
+    return { items: [], meta: { page: 1, per_page: 50, total: 0, total_pages: 1 } };
+  }
+  async getViewData(viewId: number, _tableId: number, opts: { page?: number; size?: number } = {}): Promise<ViewDataResult> {
+    const result = this.viewDataByView.get(viewId);
+    if (!result) {
+      return { items: [], meta: { page: opts.page ?? 1, per_page: opts.size ?? 100, total: 0, total_pages: 1 }, viewType: 'grid' };
+    }
+    return result;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Redis stub with controllable storage
+// ---------------------------------------------------------------------------
+
+class FakeRedis {
+  private store: Map<string, string> = new Map();
+
+  async get<T>(key: string): Promise<T | null> {
+    const raw = this.store.get(key);
+    if (!raw) return null;
+    return JSON.parse(raw) as T;
+  }
+
+  async set<T>(key: string, value: T, _ttl?: number): Promise<void> {
+    this.store.set(key, JSON.stringify(value));
+  }
+
+  async del(key: string | string[]): Promise<void> {
+    const keys = Array.isArray(key) ? key : [key];
+    for (const k of keys) this.store.delete(k);
+  }
+
+  async invalidatePattern(_p: string): Promise<number> { return 0; }
+  async checkRateLimit(): Promise<boolean> { return true; }
+  getClient() { return { xadd: async () => '0-0' }; }
+}
+
+function buildFakeRepos(viewDataByView?: Map<number, ViewDataResult>): RepoSet {
+  return {
+    tables: new FakeTablesRepo() as unknown as RepoSet['tables'],
+    fields: new FakeFieldsRepo() as unknown as RepoSet['fields'],
+    views: new FakeViewsRepo(viewDataByView) as unknown as RepoSet['views'],
+    rows: new FakeRowsRepo() as unknown as RepoSet['rows'],
+  };
+}
+
+function bootApp(redis?: FakeRedis, viewDataByView?: Map<number, ViewDataResult>) {
+  const repos = buildFakeRepos(viewDataByView);
+  const fakeRedis = redis ?? new FakeRedis();
+  const container = installTestContainer({ repos, redis: fakeRedis as unknown as RedisCache });
+  return { app: buildTestApp(container), redis: fakeRedis };
+}
+
+afterEach(resetTestContainer);
+
+// ---------------------------------------------------------------------------
+// GET /api/v1/views/:viewId/timeline-config
+// ---------------------------------------------------------------------------
+
+describe('GET /api/v1/views/:viewId/timeline-config', () => {
+  it('401 sans token', async () => {
+    const { app } = bootApp();
+    const res = await app.request('/api/v1/views/1/timeline-config');
+    expect(res.status).toBe(401);
+  });
+
+  it('returns null when no config stored', async () => {
+    const { app } = bootApp();
+    const res = await app.request('/api/v1/views/1/timeline-config', {
+      headers: { Authorization: `Bearer ${READ_TOKEN}` },
+    });
+    expect(res.status).toBe(200);
+    const body = (await res.json()) as { data: null };
+    expect(body.data).toBeNull();
+  });
+
+  it('returns stored config', async () => {
+    const redis = new FakeRedis();
+    const config: TimelineConfig = {
+      startCol: 'Start',
+      endCol: 'End',
+      resourceCol: null,
+      titleCol: 'Name',
+    };
+    await redis.set('bridge:timeline-config:42', config);
+    const { app } = bootApp(redis);
+    const res = await app.request('/api/v1/views/42/timeline-config', {
+      headers: { Authorization: `Bearer ${READ_TOKEN}` },
+    });
+    expect(res.status).toBe(200);
+    const body = (await res.json()) as { data: TimelineConfig };
+    expect(body.data.startCol).toBe('Start');
+    expect(body.data.titleCol).toBe('Name');
+    expect(body.data.endCol).toBe('End');
+    expect(body.data.resourceCol).toBeNull();
+  });
+
+  it('400 si viewId invalide', async () => {
+    const { app } = bootApp();
+    const res = await app.request('/api/v1/views/abc/timeline-config', {
+      headers: { Authorization: `Bearer ${READ_TOKEN}` },
+    });
+    expect(res.status).toBe(400);
+  });
+});
+
+// ---------------------------------------------------------------------------
+// POST /api/v1/views/:viewId/timeline-config
+// ---------------------------------------------------------------------------
+
+describe('POST /api/v1/views/:viewId/timeline-config', () => {
+  it('401 sans token', async () => {
+    const { app } = bootApp();
+    const res = await app.request('/api/v1/views/1/timeline-config', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ startCol: 'Start', titleCol: 'Name' }),
+    });
+    expect(res.status).toBe(401);
+  });
+
+  it('403 sans scope write:tables (read-only token)', async () => {
+    const { app } = bootApp();
+    const res = await app.request('/api/v1/views/1/timeline-config', {
+      method: 'POST',
+      headers: {
+        Authorization: `Bearer ${READ_TOKEN}`,
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({ startCol: 'Start', titleCol: 'Name' }),
+    });
+    expect(res.status).toBe(403);
+  });
+
+  it('400 si startCol absent', async () => {
+    const { app } = bootApp();
+    const res = await app.request('/api/v1/views/1/timeline-config', {
+      method: 'POST',
+      headers: {
+        Authorization: `Bearer ${WRITE_TOKEN}`,
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({ titleCol: 'Name' }),
+    });
+    expect(res.status).toBe(400);
+  });
+
+  it('400 si titleCol absent', async () => {
+    const { app } = bootApp();
+    const res = await app.request('/api/v1/views/1/timeline-config', {
+      method: 'POST',
+      headers: {
+        Authorization: `Bearer ${WRITE_TOKEN}`,
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({ startCol: 'Start' }),
+    });
+    expect(res.status).toBe(400);
+  });
+
+  it('200 sauvegarde config minimale (sans endCol ni resourceCol)', async () => {
+    const redis = new FakeRedis();
+    const { app } = bootApp(redis);
+    const res = await app.request('/api/v1/views/10/timeline-config', {
+      method: 'POST',
+      headers: {
+        Authorization: `Bearer ${WRITE_TOKEN}`,
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({ startCol: 'Start', titleCol: 'Name' }),
+    });
+    expect(res.status).toBe(200);
+    const body = (await res.json()) as { data: TimelineConfig };
+    expect(body.data.startCol).toBe('Start');
+    expect(body.data.titleCol).toBe('Name');
+    expect(body.data.endCol).toBeNull();
+    expect(body.data.resourceCol).toBeNull();
+
+    // Verify persisted in Redis.
+    const stored = await redis.get<TimelineConfig>('bridge:timeline-config:10');
+    expect(stored?.startCol).toBe('Start');
+  });
+
+  it('200 sauvegarde config complete avec endCol et resourceCol', async () => {
+    const redis = new FakeRedis();
+    const { app } = bootApp(redis);
+    const payload = {
+      startCol: 'Start',
+      endCol: 'Deadline',
+      resourceCol: 'Team',
+      titleCol: 'Task',
+    };
+    const res = await app.request('/api/v1/views/20/timeline-config', {
+      method: 'POST',
+      headers: {
+        Authorization: `Bearer ${WRITE_TOKEN}`,
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify(payload),
+    });
+    expect(res.status).toBe(200);
+    const body = (await res.json()) as { data: TimelineConfig };
+    expect(body.data.endCol).toBe('Deadline');
+    expect(body.data.resourceCol).toBe('Team');
+  });
+
+  it('admin token peut sauvegarder', async () => {
+    const { app } = bootApp();
+    const res = await app.request('/api/v1/views/5/timeline-config', {
+      method: 'POST',
+      headers: {
+        Authorization: `Bearer ${ADMIN_TOKEN}`,
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({ startCol: 'S', titleCol: 'T' }),
+    });
+    expect(res.status).toBe(200);
+  });
+
+  it('ecrase config existante', async () => {
+    const redis = new FakeRedis();
+    await redis.set('bridge:timeline-config:7', { startCol: 'Old', titleCol: 'OldTitle', endCol: null, resourceCol: null });
+    const { app } = bootApp(redis);
+    const res = await app.request('/api/v1/views/7/timeline-config', {
+      method: 'POST',
+      headers: {
+        Authorization: `Bearer ${WRITE_TOKEN}`,
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({ startCol: 'New', titleCol: 'NewTitle' }),
+    });
+    expect(res.status).toBe(200);
+    const stored = await redis.get<TimelineConfig>('bridge:timeline-config:7');
+    expect(stored?.startCol).toBe('New');
+    expect(stored?.titleCol).toBe('NewTitle');
+  });
+});