P3-C: dashboard worktree-first + acceptance P3 (MVP complet)

Vue racine consolidée : repos → worktrees avec état git ET état de session
corrélé. Complète le MVP (P2 découverte/reprise + P3-A worktrees + P3-B états fins).

- web/lib/ws-client: abonnement multi-topics (sessions + worktrees), subscribeWorktrees.
- web/stores/worktrees: repos + worktrees, CRUD, temps réel (repo_update/worktree_*).
- web/views/DashboardView (route racine /), components RepoSection + WorktreeCard ;
  SessionStateBadge réutilisé pour l'état des sessions corrélées.
- router: / = dashboard, /sessions = liste à plat (sessions hors worktree), nav croisée.
- i18n EN/FR (dashboard/repos/worktrees).
- fix: @xterm/headless est CommonJS → chargé via createRequire (l'import nommé ESM
  échouait sous Node natif, masqué par esbuild en test) ; détecté par l'acceptation.
- scripts/acceptance-p3.mjs: repo git tmp → enregistrement, worktree + hook, broadcast
  WS worktree_update, corrélation session bash, suppression (409 sans force, 200 avec).

Vérifs : typecheck, 159 tests, build (vue-tsc), acceptations P1/P2/P3 ALL GREEN.

CLAUDE.md

@@ -22,6 +22,7 @@ npm run pack           # build + npm pack du tarball git-arboretum
 
 node packages/server/scripts/acceptance-p1.mjs   # acceptation E2E P1 (daemon réel + client WS réel)
 node packages/server/scripts/acceptance-p2.mjs   # acceptation E2E P2 (découverte/reprise : faux ~/.claude + faux binaire claude)
+node packages/server/scripts/acceptance-p3.mjs   # acceptation E2E P3 (worktrees : repo git tmp + hook + corrélation session)
 ```
 
 L'acceptation exige `npm run build` au préalable (elle lance `dist/index.js`) et utilise la commande `bash` plutôt que `claude` pour ne pas consommer de quota.

packages/server/scripts/acceptance-p3.mjs

@@ -0,0 +1,141 @@
+#!/usr/bin/env node
+// Acceptation P3 (sans navigateur, sans quota Claude) : worktrees multi-repo + dashboard.
+// Vrai daemon + vrai repo git tmp. Couvre : enregistrement repo, création worktree avec hook
+// post-create, broadcast WS worktree_update, corrélation worktree↔session (bash), suppression.
+import { spawn, execFileSync } from 'node:child_process';
+import { mkdtempSync, rmSync, existsSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join, dirname, basename } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { createRequire } from 'node:module';
+
+const require = createRequire(import.meta.url);
+const WebSocket = require('ws');
+
+const PORT = 7543;
+const ORIGIN = `http://127.0.0.1:${PORT}`;
+const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
+const serverDir = join(dirname(fileURLToPath(import.meta.url)), '..');
+const results = [];
+const check = (name, ok, detail = '') => {
+  results.push({ name, ok, detail });
+  console.log(`${ok ? '✅' : '❌'} ${name}${detail ? ` — ${detail}` : ''}`);
+};
+
+const tmp = mkdtempSync(join(tmpdir(), 'arb-accept-p3-'));
+const repo = join(tmp, 'demo-repo');
+const wtPath = join(tmp, 'demo-repo-wt-feat');
+execFileSync('mkdir', ['-p', repo]);
+const git = (...args) => execFileSync('git', args, { cwd: repo, stdio: 'pipe' });
+git('init', '-b', 'main');
+git('config', 'user.email', 'test@arboretum.dev');
+git('config', 'user.name', 'Test');
+execFileSync('bash', ['-lc', 'echo "# demo" > README.md'], { cwd: repo });
+git('add', '-A');
+git('commit', '-m', 'init');
+
+const srv = spawn(
+  'node',
+  [join(serverDir, 'dist', 'index.js'), '--port', String(PORT), '--db', join(tmp, 'a.db'), '--claude-home', join(tmp, 'claude')],
+  { env: { ...process.env, ARBORETUM_LOG: 'warn' }, stdio: ['ignore', 'pipe', 'pipe'] },
+);
+let srvOut = '';
+srv.stdout.on('data', (d) => (srvOut += d));
+srv.stderr.on('data', (d) => (srvOut += d));
+
+function wsClient(cookie) {
+  const ws = new WebSocket(`ws://127.0.0.1:${PORT}/ws`, { headers: { Origin: ORIGIN, Cookie: cookie } });
+  const state = { msgs: [] };
+  ws.on('message', (data, isBinary) => {
+    if (!isBinary) state.msgs.push(JSON.parse(String(data)));
+  });
+  const waitMsg = async (pred, timeout = 8000) => {
+    const t0 = Date.now();
+    while (Date.now() - t0 < timeout) {
+      const m = state.msgs.find(pred);
+      if (m) return m;
+      await sleep(50);
+    }
+    return null;
+  };
+  return { ws, state, waitMsg, send: (m) => ws.send(JSON.stringify(m)) };
+}
+
+const j = (path, method, cookie, body) =>
+  fetch(`${ORIGIN}${path}`, {
+    method,
+    headers: { Origin: ORIGIN, Cookie: cookie, ...(body ? { 'Content-Type': 'application/json' } : {}) },
+    ...(body ? { body: JSON.stringify(body) } : {}),
+  });
+
+try {
+  await sleep(1500);
+  const token = /arb_[0-9a-f]+/.exec(srvOut)?.[0];
+  check('boot + token bootstrap', !!token);
+
+  const login = await fetch(`${ORIGIN}/api/v1/auth/login`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json', Origin: ORIGIN },
+    body: JSON.stringify({ token }),
+  });
+  const cookie = login.headers.get('set-cookie')?.split(';')[0] ?? '';
+  check('login → cookie', login.status === 200);
+
+  const c = wsClient(cookie);
+  await new Promise((res, rej) => (c.ws.on('open', res), c.ws.on('error', rej)));
+  c.send({ type: 'hello', protocol: 1 });
+  await c.waitMsg((m) => m.type === 'hello_ok');
+  c.send({ type: 'sub', topics: ['sessions', 'worktrees'] });
+
+  // Enregistrement du repo (avec un hook post-create).
+  const addRepo = await j('/api/v1/repos', 'POST', cookie, {
+    path: repo,
+    postCreateHooks: [{ id: 'h1', label: 'touch', run: 'touch hook-ok.txt', enabled: true }],
+  });
+  const repoSummary = (await addRepo.json()).repo;
+  check('POST /repos → 201 (repo valide)', addRepo.status === 201 && repoSummary?.valid === true);
+
+  const wlist0 = await (await j('/api/v1/worktrees', 'GET', cookie)).json();
+  check('GET /worktrees → main worktree présent', wlist0.worktrees.some((w) => w.isMain && w.branch === 'main'));
+
+  // Création d'un worktree + hook + session bash.
+  const created = await j(`/api/v1/repos/${repoSummary.id}/worktrees`, 'POST', cookie, {
+    branch: 'feat',
+    newBranch: true,
+    runHooks: true,
+    startSession: 'bash',
+  });
+  const createdBody = await created.json();
+  check('POST worktree → 201', created.status === 201 && createdBody.worktree?.branch === 'feat');
+  check('hook post-create exécuté', createdBody.hookResults?.[0]?.exitCode === 0 && existsSync(join(wtPath, 'hook-ok.txt')));
+  check('startSession bash → session managée', createdBody.session?.command === 'bash');
+
+  const pushed = await c.waitMsg((m) => m.type === 'worktree_update' && m.worktree?.branch === 'feat');
+  check('broadcast WS worktree_update', !!pushed);
+
+  // Corrélation worktree ↔ session par cwd.
+  await sleep(300);
+  const wlist1 = await (await j('/api/v1/worktrees', 'GET', cookie)).json();
+  const feat = wlist1.worktrees.find((w) => w.branch === 'feat');
+  check('corrélation worktree ↔ session (cwd)', feat?.sessions?.some((s) => s.command === 'bash' && s.live));
+
+  // Suppression forcée (une session vit dans le worktree).
+  const refused = await j(`/api/v1/repos/${repoSummary.id}/worktrees?path=${encodeURIComponent(wtPath)}&force=false`, 'DELETE', cookie);
+  check('delete sans force (session live) → 409', refused.status === 409);
+  const del = await j(`/api/v1/repos/${repoSummary.id}/worktrees?path=${encodeURIComponent(wtPath)}&force=true`, 'DELETE', cookie);
+  check('delete force → 200', del.status === 200);
+  const removed = await c.waitMsg((m) => m.type === 'worktree_removed', 8000);
+  check('broadcast WS worktree_removed', !!removed);
+
+  c.ws.close();
+} catch (err) {
+  check('exception', false, String(err));
+} finally {
+  srv.kill('SIGTERM');
+  await sleep(1500);
+  check('arrêt propre du daemon (SIGTERM)', srv.exitCode === 0 || srv.signalCode === null || srv.exitCode === null);
+  rmSync(tmp, { recursive: true, force: true });
+  const failed = results.filter((r) => !r.ok);
+  console.log(failed.length === 0 ? '\nACCEPTANCE P3: ALL GREEN' : `\nACCEPTANCE P3: ${failed.length} FAILURE(S)`);
+  process.exit(failed.length === 0 ? 0 : 1);
+}

packages/server/src/core/screen-reader.ts

@@ -1,10 +1,16 @@
 // Reconstruction d'écran via @xterm/headless : terminal headless PERSISTANT par session, alimenté
 // incrémentalement par le flux PTY. Remplace le strip ANSI naïf (qui « mange les espaces » et casse
 // la détection des dialogues — verdict S1/S3). Aucune dépendance DOM (usage Node).
-import { Terminal } from '@xterm/headless';
+import { createRequire } from 'node:module';
+import type { Terminal as XtermTerminal } from '@xterm/headless';
+
+// @xterm/headless est publié en CommonJS : sous Node ESM natif l'import nommé échoue
+// (cjs-module-lexer ne détecte pas l'export). On charge via require, typé par l'import type.
+const require = createRequire(import.meta.url);
+const { Terminal } = require('@xterm/headless') as { Terminal: typeof XtermTerminal };
 
 export class ScreenReader {
-  private readonly term: Terminal;
+  private readonly term: XtermTerminal;
 
   constructor(cols = 120, rows = 40) {
     this.term = new Terminal({ cols, rows, scrollback: 0, allowProposedApi: true });

packages/web/src/components/RepoSection.vue

@@ -0,0 +1,93 @@
+<template>
+  <section class="flex flex-col gap-2 rounded-lg border border-zinc-800 bg-zinc-900/50 p-3">
+    <header class="flex items-center gap-2">
+      <h2 class="font-semibold text-zinc-100">{{ repo.label }}</h2>
+      <span v-if="!repo.valid" class="badge bg-red-950 text-red-400">{{ t('repos.invalid') }}</span>
+      <span class="truncate font-mono text-xs text-zinc-500" :title="repo.path">{{ repo.path }}</span>
+      <div class="ml-auto flex items-center gap-2">
+        <button class="btn text-xs" @click="creating = !creating">{{ t('worktrees.new') }}</button>
+        <button class="btn text-xs" :disabled="busy" @click="onPrune">{{ t('worktrees.prune') }}</button>
+        <button class="btn-danger text-xs" @click="onRemove">{{ t('repos.remove') }}</button>
+      </div>
+    </header>
+
+    <form v-if="creating" class="flex flex-wrap items-end gap-2 rounded border border-zinc-800 bg-zinc-950/40 p-2" @submit.prevent="onCreate">
+      <label class="flex flex-1 flex-col gap-1 text-xs text-zinc-400">
+        {{ t('worktrees.branch') }}
+        <input v-model="branch" class="input font-mono" :placeholder="repo.defaultBranch ? `feature/…` : 'feature/…'" required />
+      </label>
+      <label class="flex flex-col gap-1 text-xs text-zinc-400">
+        {{ t('worktrees.start') }}
+        <select v-model="startSession" class="input">
+          <option :value="null">{{ t('worktrees.startNone') }}</option>
+          <option value="claude">claude</option>
+          <option value="bash">bash</option>
+        </select>
+      </label>
+      <label class="flex items-center gap-1 text-xs text-zinc-400"><input v-model="newBranch" type="checkbox" /> {{ t('worktrees.newBranch') }}</label>
+      <button type="submit" class="btn-primary text-xs" :disabled="busy || branch.trim() === ''">
+        {{ busy ? t('worktrees.creating') : t('worktrees.create') }}
+      </button>
+    </form>
+    <p v-if="error" class="text-sm text-red-400">{{ error }}</p>
+
+    <div class="flex flex-col gap-1.5">
+      <WorktreeCard v-for="w in worktrees" :key="w.path" :worktree="w" />
+    </div>
+  </section>
+</template>
+
+<script setup lang="ts">
+import { computed, ref } from 'vue';
+import { useI18n } from 'vue-i18n';
+import type { RepoSummary } from '@arboretum/shared';
+import { useWorktreesStore } from '../stores/worktrees';
+import WorktreeCard from './WorktreeCard.vue';
+
+const props = defineProps<{ repo: RepoSummary }>();
+const { t } = useI18n();
+const store = useWorktreesStore();
+
+const worktrees = computed(() => store.worktreesForRepo(props.repo.id));
+const creating = ref(false);
+const branch = ref('');
+const newBranch = ref(true);
+const startSession = ref<'claude' | 'bash' | null>(null);
+const busy = ref(false);
+const error = ref<string | null>(null);
+
+async function onCreate(): Promise<void> {
+  busy.value = true;
+  error.value = null;
+  try {
+    await store.createWorktree(props.repo.id, { branch: branch.value.trim(), newBranch: newBranch.value, startSession: startSession.value });
+    branch.value = '';
+    creating.value = false;
+  } catch (err) {
+    error.value = err instanceof Error ? err.message : String(err);
+  } finally {
+    busy.value = false;
+  }
+}
+
+async function onPrune(): Promise<void> {
+  busy.value = true;
+  error.value = null;
+  try {
+    await store.prune(props.repo.id);
+  } catch (err) {
+    error.value = err instanceof Error ? err.message : String(err);
+  } finally {
+    busy.value = false;
+  }
+}
+
+async function onRemove(): Promise<void> {
+  error.value = null;
+  try {
+    await store.removeRepo(props.repo.id);
+  } catch (err) {
+    error.value = err instanceof Error ? err.message : String(err);
+  }
+}
+</script>

packages/web/src/components/WorktreeCard.vue

@@ -0,0 +1,87 @@
+<template>
+  <div class="rounded border border-zinc-800 bg-zinc-900/40 p-2">
+    <div class="flex items-center gap-2">
+      <span class="font-mono text-sm text-zinc-200">{{ branchLabel }}</span>
+      <span v-if="worktree.isMain" class="badge bg-zinc-800 text-zinc-400">{{ t('worktrees.main') }}</span>
+      <span v-if="worktree.locked" class="badge bg-zinc-800 text-zinc-500">{{ t('worktrees.locked') }}</span>
+      <span v-if="worktree.prunable" class="badge bg-zinc-800 text-zinc-500">{{ t('worktrees.prunable') }}</span>
+      <span class="ml-auto flex items-center gap-2 text-xs text-zinc-500">
+        <span v-if="worktree.git.ahead">↑{{ worktree.git.ahead }}</span>
+        <span v-if="worktree.git.behind">↓{{ worktree.git.behind }}</span>
+        <span v-if="worktree.git.dirtyCount" class="text-amber-400">● {{ t('worktrees.dirty', { n: worktree.git.dirtyCount }) }}</span>
+        <span v-else class="text-zinc-600">{{ t('worktrees.clean') }}</span>
+      </span>
+    </div>
+    <p class="truncate font-mono text-xs text-zinc-500" :title="worktree.path">{{ worktree.path }}</p>
+
+    <div class="mt-1 flex flex-wrap items-center gap-2">
+      <RouterLink
+        v-for="s in worktree.sessions"
+        :key="s.id"
+        :to="{ name: 'session', params: { id: s.id } }"
+        class="flex items-center gap-1 rounded bg-zinc-800/60 px-1.5 py-0.5 transition-colors hover:bg-zinc-800"
+      >
+        <SessionStateBadge :session="s" />
+        <span class="font-mono text-[11px] text-zinc-400">{{ s.command }}</span>
+      </RouterLink>
+      <span v-if="worktree.sessions.length === 0" class="text-xs text-zinc-600">{{ t('worktrees.noSession') }}</span>
+
+      <div v-if="!worktree.isMain" class="ml-auto flex items-center gap-2">
+        <template v-if="confirming">
+          <span v-if="error" class="text-xs text-amber-400">{{ error }}</span>
+          <button class="btn-danger text-xs" :disabled="busy" @click="onDelete">
+            {{ forceNeeded ? t('worktrees.forceDelete') : t('worktrees.confirmDelete') }}
+          </button>
+          <button class="btn text-xs" @click="reset">{{ t('common.cancel') }}</button>
+        </template>
+        <button v-else class="btn-danger text-xs" @click="confirming = true">{{ t('worktrees.delete') }}</button>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed, ref } from 'vue';
+import { useI18n } from 'vue-i18n';
+import type { WorktreeSummary } from '@arboretum/shared';
+import { useWorktreesStore } from '../stores/worktrees';
+import { ApiError } from '../lib/api';
+import SessionStateBadge from './SessionStateBadge.vue';
+
+const props = defineProps<{ worktree: WorktreeSummary }>();
+const { t } = useI18n();
+const store = useWorktreesStore();
+
+const confirming = ref(false);
+const forceNeeded = ref(false);
+const error = ref<string | null>(null);
+const busy = ref(false);
+
+const branchLabel = computed(() =>
+  props.worktree.branch ?? (props.worktree.detached ? `${t('worktrees.detached')} ${props.worktree.head.slice(0, 7)}` : '—'),
+);
+
+function reset(): void {
+  confirming.value = false;
+  forceNeeded.value = false;
+  error.value = null;
+}
+
+async function onDelete(): Promise<void> {
+  busy.value = true;
+  error.value = null;
+  try {
+    await store.deleteWorktree(props.worktree.repoId, props.worktree.path, forceNeeded.value);
+    // succès : l'événement worktree_removed (ou le retrait local) démonte la carte
+  } catch (err) {
+    if (err instanceof ApiError && err.status === 409) {
+      forceNeeded.value = true; // dirty ou session vivante → proposer la suppression forcée
+      error.value = err.message;
+    } else {
+      error.value = err instanceof Error ? err.message : String(err);
+    }
+  } finally {
+    busy.value = false;
+  }
+}
+</script>

packages/web/src/i18n/en.ts

@@ -48,6 +48,39 @@ export default {
       waiting: 'waiting',
     },
   },
+  dashboard: {
+    title: 'Worktrees',
+    allSessions: 'All sessions',
+  },
+  repos: {
+    add: 'Add repo',
+    adding: 'Adding…',
+    remove: 'Remove',
+    pathLabel: 'Repository path',
+    pathPlaceholder: '/absolute/path/to/repo',
+    empty: 'No repository registered yet — add one above.',
+    invalid: 'unavailable',
+  },
+  worktrees: {
+    new: 'New worktree',
+    create: 'Create',
+    creating: 'Creating…',
+    branch: 'Branch',
+    newBranch: 'create branch',
+    start: 'Start',
+    startNone: 'no session',
+    delete: 'Delete',
+    confirmDelete: 'Confirm delete',
+    forceDelete: 'Force delete',
+    prune: 'Prune',
+    main: 'main',
+    detached: 'detached',
+    locked: 'locked',
+    prunable: 'prunable',
+    clean: 'clean',
+    dirty: '{n} changed',
+    noSession: 'no session',
+  },
   terminal: {
     observer: 'observer (read-only)',
     sessionEnded: 'Session ended',

packages/web/src/i18n/fr.ts

@@ -50,6 +50,39 @@ const fr: typeof en = {
       waiting: 'en attente',
     },
   },
+  dashboard: {
+    title: 'Worktrees',
+    allSessions: 'Toutes les sessions',
+  },
+  repos: {
+    add: 'Ajouter un repo',
+    adding: 'Ajout…',
+    remove: 'Retirer',
+    pathLabel: 'Chemin du dépôt',
+    pathPlaceholder: '/chemin/absolu/du/repo',
+    empty: 'Aucun dépôt enregistré — ajoutez-en un ci-dessus.',
+    invalid: 'indisponible',
+  },
+  worktrees: {
+    new: 'Nouveau worktree',
+    create: 'Créer',
+    creating: 'Création…',
+    branch: 'Branche',
+    newBranch: 'créer la branche',
+    start: 'Démarrer',
+    startNone: 'aucune session',
+    delete: 'Supprimer',
+    confirmDelete: 'Confirmer',
+    forceDelete: 'Forcer la suppression',
+    prune: 'Élaguer',
+    main: 'principal',
+    detached: 'détaché',
+    locked: 'verrouillé',
+    prunable: 'élaguable',
+    clean: 'propre',
+    dirty: '{n} modifié(s)',
+    noSession: 'aucune session',
+  },
   terminal: {
     observer: 'observateur (lecture seule)',
     sessionEnded: 'Session terminée',

packages/web/src/lib/ws-client.ts

@@ -27,6 +27,7 @@ export interface TerminalSink {
 }
 
 export type SessionEvent = Extract<ServerMessage, { type: 'session_update' | 'session_exit' }>;
+export type WorktreeEvent = Extract<ServerMessage, { type: 'repo_update' | 'repo_removed' | 'worktree_update' | 'worktree_removed' }>;
 
 export interface AttachOptions {
   sessionId: string;
@@ -104,6 +105,7 @@ export class WsClient {
   /** FIFO des attaches en attente : le serveur répond aux 'attach' dans l'ordre */
   private awaitingAttached: Attachment[] = [];
   private readonly sessionListeners = new Set<(e: SessionEvent) => void>();
+  private readonly worktreeListeners = new Set<(e: WorktreeEvent) => void>();
 
   connect(): void {
     this.stopped = false;
@@ -143,13 +145,35 @@ export class WsClient {
     return promise;
   }
 
+  /** topics actifs = union des abonnements courants (une seule connexion partagée). */
+  private activeTopics(): Array<'sessions' | 'worktrees'> {
+    const t: Array<'sessions' | 'worktrees'> = [];
+    if (this.sessionListeners.size > 0) t.push('sessions');
+    if (this.worktreeListeners.size > 0) t.push('worktrees');
+    return t;
+  }
+
+  private sendSub(): void {
+    this.sendControl({ type: 'sub', topics: this.activeTopics() });
+  }
+
   subscribeSessions(listener: (e: SessionEvent) => void): () => void {
     this.sessionListeners.add(listener);
     this.connect();
-    if (this.sessionListeners.size === 1) this.sendControl({ type: 'sub', topics: ['sessions'] });
+    this.sendSub();
     return () => {
       this.sessionListeners.delete(listener);
-      if (this.sessionListeners.size === 0) this.sendControl({ type: 'sub', topics: [] });
+      this.sendSub();
+    };
+  }
+
+  subscribeWorktrees(listener: (e: WorktreeEvent) => void): () => void {
+    this.worktreeListeners.add(listener);
+    this.connect();
+    this.sendSub();
+    return () => {
+      this.worktreeListeners.delete(listener);
+      this.sendSub();
     };
   }
 
@@ -288,7 +312,7 @@ export class WsClient {
         this.ready = true;
         this.backoffMs = BACKOFF_MIN_MS;
         this.status.value = 'open';
-        if (this.sessionListeners.size > 0) this.sendControl({ type: 'sub', topics: ['sessions'] });
+        this.sendSub();
         // ré-attache des terminaux encore ouverts (nouveaux canaux côté serveur)
         for (const att of this.attachments) {
           if (!att.closed) this.sendAttach(att);
@@ -339,6 +363,13 @@ export class WsClient {
         for (const cb of this.sessionListeners) cb(msg);
         return;
       }
+      case 'repo_update':
+      case 'repo_removed':
+      case 'worktree_update':
+      case 'worktree_removed': {
+        for (const cb of this.worktreeListeners) cb(msg);
+        return;
+      }
       case 'error': {
         if (msg.channel !== undefined) {
           console.warn(`[ws] channel ${msg.channel}: ${msg.code} — ${msg.message}`);

packages/web/src/router/index.ts

@@ -5,7 +5,8 @@ export const router = createRouter({
   history: createWebHistory(),
   routes: [
     { path: '/login', name: 'login', component: () => import('../views/LoginView.vue') },
-    { path: '/', name: 'sessions', component: () => import('../views/SessionsListView.vue') },
+    { path: '/', name: 'dashboard', component: () => import('../views/DashboardView.vue') },
+    { path: '/sessions', name: 'sessions', component: () => import('../views/SessionsListView.vue') },
     { path: '/sessions/:id', name: 'session', component: () => import('../views/SessionView.vue') },
     { path: '/:pathMatch(.*)*', redirect: '/' },
   ],
@@ -15,6 +16,6 @@ export const router = createRouter({
 router.beforeEach(async (to) => {
   const auth = useAuthStore();
   if (auth.authenticated === null) await auth.check();
-  if (to.name === 'login') return auth.authenticated ? { name: 'sessions' } : true;
+  if (to.name === 'login') return auth.authenticated ? { name: 'dashboard' } : true;
   return auth.authenticated ? true : { name: 'login', query: { redirect: to.fullPath } };
 });

packages/web/src/stores/worktrees.ts

@@ -0,0 +1,126 @@
+import { defineStore } from 'pinia';
+import { ref } from 'vue';
+import type {
+  CreateWorktreeRequest,
+  CreateWorktreeResponse,
+  RepoResponse,
+  ReposListResponse,
+  RepoSummary,
+  WorktreeSummary,
+  WorktreesListResponse,
+} from '@arboretum/shared';
+import { api } from '../lib/api';
+import { wsClient, type WorktreeEvent } from '../lib/ws-client';
+
+export const useWorktreesStore = defineStore('worktrees', () => {
+  const repos = ref<RepoSummary[]>([]);
+  const worktrees = ref<WorktreeSummary[]>([]);
+  const loading = ref(false);
+  const loadError = ref<string | null>(null);
+  let unsubscribe: (() => void) | null = null;
+
+  function upsertRepo(repo: RepoSummary): void {
+    const idx = repos.value.findIndex((r) => r.id === repo.id);
+    if (idx >= 0) repos.value.splice(idx, 1, repo);
+    else repos.value.push(repo);
+  }
+  function removeRepoLocal(id: string): void {
+    repos.value = repos.value.filter((r) => r.id !== id);
+    worktrees.value = worktrees.value.filter((w) => w.repoId !== id);
+  }
+  function upsertWorktree(wt: WorktreeSummary): void {
+    const idx = worktrees.value.findIndex((w) => w.path === wt.path);
+    if (idx >= 0) worktrees.value.splice(idx, 1, wt);
+    else worktrees.value.push(wt);
+  }
+  function removeWorktreeLocal(path: string): void {
+    worktrees.value = worktrees.value.filter((w) => w.path !== path);
+  }
+
+  function onEvent(e: WorktreeEvent): void {
+    if (e.type === 'repo_update') upsertRepo(e.repo);
+    else if (e.type === 'repo_removed') removeRepoLocal(e.repoId);
+    else if (e.type === 'worktree_update') upsertWorktree(e.worktree);
+    else removeWorktreeLocal(e.path);
+  }
+
+  function worktreesForRepo(repoId: string): WorktreeSummary[] {
+    return worktrees.value
+      .filter((w) => w.repoId === repoId)
+      .sort((a, b) => Number(b.isMain) - Number(a.isMain) || a.path.localeCompare(b.path));
+  }
+
+  async function fetchAll(): Promise<void> {
+    loading.value = true;
+    loadError.value = null;
+    try {
+      const [r, w] = await Promise.all([
+        api.get<ReposListResponse>('/api/v1/repos'),
+        api.get<WorktreesListResponse>('/api/v1/worktrees'),
+      ]);
+      repos.value = r.repos;
+      worktrees.value = w.worktrees;
+    } catch (err) {
+      loadError.value = err instanceof Error ? err.message : String(err);
+    } finally {
+      loading.value = false;
+    }
+  }
+
+  async function refreshRepoWorktrees(repoId: string): Promise<void> {
+    const w = await api.get<WorktreesListResponse>(`/api/v1/repos/${repoId}/worktrees`);
+    for (const wt of w.worktrees) upsertWorktree(wt);
+  }
+
+  async function addRepo(path: string, label?: string): Promise<RepoSummary> {
+    const res = await api.post<RepoResponse>('/api/v1/repos', { path, ...(label ? { label } : {}) });
+    upsertRepo(res.repo);
+    await refreshRepoWorktrees(res.repo.id);
+    return res.repo;
+  }
+
+  async function removeRepo(id: string): Promise<void> {
+    await api.delete<{ ok: true }>(`/api/v1/repos/${id}`);
+    removeRepoLocal(id);
+  }
+
+  async function createWorktree(repoId: string, req: CreateWorktreeRequest): Promise<CreateWorktreeResponse> {
+    const res = await api.post<CreateWorktreeResponse>(`/api/v1/repos/${repoId}/worktrees`, req);
+    upsertWorktree(res.worktree);
+    return res;
+  }
+
+  async function deleteWorktree(repoId: string, path: string, force: boolean): Promise<void> {
+    await api.delete<{ ok: true }>(`/api/v1/repos/${repoId}/worktrees?path=${encodeURIComponent(path)}&force=${force}`);
+    removeWorktreeLocal(path);
+  }
+
+  async function prune(repoId: string): Promise<void> {
+    await api.post<{ ok: true }>(`/api/v1/repos/${repoId}/worktrees/prune`);
+    await refreshRepoWorktrees(repoId);
+  }
+
+  function startRealtime(): void {
+    unsubscribe ??= wsClient.subscribeWorktrees(onEvent);
+  }
+  function stopRealtime(): void {
+    unsubscribe?.();
+    unsubscribe = null;
+  }
+
+  return {
+    repos,
+    worktrees,
+    loading,
+    loadError,
+    worktreesForRepo,
+    fetchAll,
+    addRepo,
+    removeRepo,
+    createWorktree,
+    deleteWorktree,
+    prune,
+    startRealtime,
+    stopRealtime,
+  };
+});

packages/web/src/views/DashboardView.vue

@@ -0,0 +1,82 @@
+<template>
+  <div class="overflow-y-auto">
+    <div class="mx-auto flex max-w-3xl flex-col gap-4 px-4 py-6">
+      <header class="flex items-center gap-3">
+        <h1 class="text-lg font-semibold text-zinc-100">{{ t('dashboard.title') }}</h1>
+        <span v-if="auth.serverVersion" class="text-xs text-zinc-600">v{{ auth.serverVersion }}</span>
+        <div class="ml-auto flex items-center gap-2">
+          <RouterLink :to="{ name: 'sessions' }" class="btn">{{ t('dashboard.allSessions') }}</RouterLink>
+          <button class="btn" :disabled="store.loading" @click="store.fetchAll()">{{ t('sessions.refresh') }}</button>
+          <LanguageSwitcher />
+          <button class="btn" @click="onLogout">{{ t('common.logout') }}</button>
+        </div>
+      </header>
+
+      <form class="flex flex-col gap-2 rounded-lg border border-zinc-800 bg-zinc-900/50 p-3 sm:flex-row sm:items-end" @submit.prevent="onAddRepo">
+        <label class="flex flex-1 flex-col gap-1 text-xs text-zinc-400">
+          {{ t('repos.pathLabel') }}
+          <input v-model="newPath" type="text" class="input font-mono" :placeholder="t('repos.pathPlaceholder')" required />
+        </label>
+        <button type="submit" class="btn-primary whitespace-nowrap" :disabled="adding || newPath.trim() === ''">
+          {{ adding ? t('repos.adding') : t('repos.add') }}
+        </button>
+      </form>
+      <p v-if="addError" class="text-sm text-red-400">{{ addError }}</p>
+
+      <p v-if="store.loadError" class="text-sm text-red-400">{{ store.loadError }}</p>
+      <p v-else-if="store.loading && store.repos.length === 0" class="text-sm text-zinc-500">{{ t('common.loading') }}</p>
+      <p v-else-if="store.repos.length === 0" class="text-sm text-zinc-500">{{ t('repos.empty') }}</p>
+
+      <RepoSection v-for="repo in store.repos" :key="repo.id" :repo="repo" />
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { onMounted, ref } from 'vue';
+import { useRouter } from 'vue-router';
+import { useI18n } from 'vue-i18n';
+import { useAuthStore } from '../stores/auth';
+import { useWorktreesStore } from '../stores/worktrees';
+import { useSessionsStore } from '../stores/sessions';
+import LanguageSwitcher from '../components/LanguageSwitcher.vue';
+import RepoSection from '../components/RepoSection.vue';
+
+const { t } = useI18n();
+const router = useRouter();
+const auth = useAuthStore();
+const store = useWorktreesStore();
+const sessions = useSessionsStore();
+
+const newPath = ref('');
+const adding = ref(false);
+const addError = ref<string | null>(null);
+
+onMounted(() => {
+  void store.fetchAll();
+  store.startRealtime();
+  // les sessions alimentent la corrélation worktree↔session (cwd) côté serveur ; on suit aussi
+  // leurs mises à jour temps réel pour que les badges d'état se rafraîchissent.
+  sessions.startRealtime();
+});
+
+async function onAddRepo(): Promise<void> {
+  adding.value = true;
+  addError.value = null;
+  try {
+    await store.addRepo(newPath.value.trim());
+    newPath.value = '';
+  } catch (err) {
+    addError.value = err instanceof Error ? err.message : String(err);
+  } finally {
+    adding.value = false;
+  }
+}
+
+async function onLogout(): Promise<void> {
+  store.stopRealtime();
+  sessions.stopRealtime();
+  await auth.logout();
+  await router.replace({ name: 'login' });
+}
+</script>

packages/web/src/views/SessionsListView.vue

@@ -5,6 +5,7 @@
         <h1 class="text-lg font-semibold text-zinc-100">{{ t('sessions.title') }}</h1>
         <span v-if="auth.serverVersion" class="text-xs text-zinc-600">v{{ auth.serverVersion }}</span>
         <div class="ml-auto flex items-center gap-2">
+          <RouterLink :to="{ name: 'dashboard' }" class="btn">{{ t('dashboard.title') }}</RouterLink>
           <button class="btn" :disabled="store.loading" @click="store.fetchSessions()">
             {{ t('sessions.refresh') }}
           </button>