diff --git a/packages/web/src/components/ide/ActivityBar.vue b/packages/web/src/components/ide/ActivityBar.vue
new file mode 100644
index 0000000..144409c
--- /dev/null
+++ b/packages/web/src/components/ide/ActivityBar.vue
@@ -0,0 +1,61 @@
+<template>
+  <nav class="flex w-[var(--ide-activitybar-w)] shrink-0 flex-col items-center gap-1 border-r border-border bg-surface-1 py-2">
+    <button
+      v-for="item in items"
+      :key="item.view"
+      type="button"
+      class="relative flex h-10 w-10 items-center justify-center rounded-lg transition-colors"
+      :class="isActive(item.view) ? 'bg-surface-3 text-fg' : 'text-fg-subtle hover:bg-surface-2 hover:text-fg'"
+      :title="item.label"
+      :aria-label="item.label"
+      @click="ide.toggleActivity(item.view)"
+    >
+      <component :is="item.icon" :size="20" :stroke-width="1.75" />
+      <span
+        v-if="item.badge"
+        class="absolute top-1 right-1 flex h-3.5 min-w-3.5 items-center justify-center rounded-full bg-amber-500 px-1 text-[9px] font-semibold text-amber-950"
+      >
+        {{ item.badge }}
+      </span>
+    </button>
+
+    <div class="mt-auto flex flex-col items-center gap-1">
+      <RouterLink
+        v-for="l in links"
+        :key="l.name"
+        :to="{ name: l.name }"
+        :title="l.label"
+        :aria-label="l.label"
+        class="flex h-10 w-10 items-center justify-center rounded-lg text-fg-subtle transition-colors hover:bg-surface-2 hover:text-fg"
+      >
+        <component :is="l.icon" :size="20" :stroke-width="1.75" />
+      </RouterLink>
+    </div>
+  </nav>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue';
+import { useI18n } from 'vue-i18n';
+import { Boxes, FolderTree, GitCompare, LifeBuoy, Settings, SquareTerminal } from '@lucide/vue';
+import { useIdeStore, type ActivityView } from '../../stores/ide';
+import { useNav } from '../../composables/useNav';
+
+const { t } = useI18n();
+const ide = useIdeStore();
+const { waitingCount } = useNav();
+
+const isActive = (v: ActivityView): boolean => ide.activeActivity === v && ide.leftVisible;
+
+const items = computed(() => [
+  { view: 'explorer' as ActivityView, icon: FolderTree, label: t('ide.activity.explorer'), badge: 0 },
+  { view: 'git' as ActivityView, icon: GitCompare, label: t('ide.activity.git'), badge: 0 },
+  { view: 'sessions' as ActivityView, icon: SquareTerminal, label: t('ide.activity.sessions'), badge: waitingCount.value },
+  { view: 'groups' as ActivityView, icon: Boxes, label: t('ide.activity.groups'), badge: 0 },
+]);
+
+const links = computed(() => [
+  { name: 'settings', icon: Settings, label: t('nav.settings') },
+  { name: 'help', icon: LifeBuoy, label: t('nav.help') },
+]);
+</script>
diff --git a/packages/web/src/components/ide/IdeShell.vue b/packages/web/src/components/ide/IdeShell.vue
new file mode 100644
index 0000000..744fe28
--- /dev/null
+++ b/packages/web/src/components/ide/IdeShell.vue
@@ -0,0 +1,67 @@
+<template>
+  <div class="flex h-dvh min-h-0 flex-col bg-surface-0 text-fg">
+    <div class="flex min-h-0 flex-1">
+      <ActivityBar />
+      <template v-if="ide.leftVisible">
+        <PrimarySidebar />
+        <PanelSplitter v-model="ide.leftWidth" axis="x" :min="200" :max="560" />
+      </template>
+
+      <div class="flex min-w-0 flex-1 flex-col">
+        <!-- centre : éditeur à onglets (livré en B4). Placeholder pour l'instant. -->
+        <main class="min-h-0 flex-1 overflow-hidden">
+          <EmptyState :icon="FileCode" :title="t('ide.noFileOpen')" :hint="t('ide.noFileHint')" class="m-6" />
+        </main>
+
+        <!-- dock terminaux (livré en B5). Placeholder pour l'instant. -->
+        <template v-if="ide.bottomVisible">
+          <PanelSplitter v-model="ide.bottomHeight" axis="y" :min="120" :max="640" invert />
+          <section class="shrink-0 overflow-hidden border-t border-border" :style="{ height: `${ide.bottomHeight}px` }">
+            <EmptyState :icon="SquareTerminal" :title="t('ide.noTerminal')" :hint="t('ide.noTerminalHint')" class="m-6" />
+          </section>
+        </template>
+      </div>
+    </div>
+
+    <StatusBar />
+  </div>
+</template>
+
+<script setup lang="ts">
+// Coquille de la vue IDE (layout 'ide', plein écran). Assemble barre d'activité, panneau gauche,
+// zone centrale (éditeur), dock terminaux et barre de statut. Propriétaire de la réconciliation
+// des ressources ouvertes contre les données live (worktrees / sessions).
+import { watch } from 'vue';
+import { useI18n } from 'vue-i18n';
+import { FileCode, SquareTerminal } from '@lucide/vue';
+import { useIdeStore, wtKey } from '../../stores/ide';
+import { useWorktreesStore } from '../../stores/worktrees';
+import { useSessionsStore } from '../../stores/sessions';
+import ActivityBar from './ActivityBar.vue';
+import PrimarySidebar from './PrimarySidebar.vue';
+import PanelSplitter from './PanelSplitter.vue';
+import StatusBar from './StatusBar.vue';
+import EmptyState from '../ui/EmptyState.vue';
+
+const { t } = useI18n();
+const ide = useIdeStore();
+const worktrees = useWorktreesStore();
+const sessions = useSessionsStore();
+
+function prune(): void {
+  const live = new Set(sessions.sessions.filter((s) => s.live).map((s) => s.id));
+  const known = new Set(worktrees.worktrees.map((w) => wtKey(w.repoId, w.path)));
+  ide.pruneDeadResources(live, known);
+}
+
+// On ne réconcilie qu'une fois les données prêtes (fetch initial terminé) pour ne pas fermer les
+// onglets/terminaux persistés avant leur chargement. Puis à chaque ajout/retrait de worktree ou
+// de session.
+watch(
+  [() => worktrees.loading, () => sessions.sessions.length, () => worktrees.worktrees.length],
+  () => {
+    if (!worktrees.loading) prune();
+  },
+  { immediate: true },
+);
+</script>
diff --git a/packages/web/src/components/ide/PrimarySidebar.vue b/packages/web/src/components/ide/PrimarySidebar.vue
new file mode 100644
index 0000000..f510be0
--- /dev/null
+++ b/packages/web/src/components/ide/PrimarySidebar.vue
@@ -0,0 +1,35 @@
+<template>
+  <aside
+    class="flex min-h-0 shrink-0 flex-col border-r border-border bg-surface-1"
+    :style="{ width: `${ide.leftWidth}px` }"
+  >
+    <ProjectTree v-if="ide.activeActivity === 'explorer'" />
+    <!-- Git / Sessions / Groupes : panneaux dédiés livrés en B6 ; placeholder pour l'instant. -->
+    <div v-else class="flex h-full items-center justify-center p-4">
+      <EmptyState :icon="placeholder.icon" :title="placeholder.title" :hint="t('ide.comingSoon')" />
+    </div>
+  </aside>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue';
+import { useI18n } from 'vue-i18n';
+import { Boxes, GitCompare, SquareTerminal } from '@lucide/vue';
+import { useIdeStore } from '../../stores/ide';
+import ProjectTree from './ProjectTree.vue';
+import EmptyState from '../ui/EmptyState.vue';
+
+const { t } = useI18n();
+const ide = useIdeStore();
+
+const placeholder = computed(() => {
+  switch (ide.activeActivity) {
+    case 'git':
+      return { icon: GitCompare, title: t('ide.activity.git') };
+    case 'sessions':
+      return { icon: SquareTerminal, title: t('ide.activity.sessions') };
+    default:
+      return { icon: Boxes, title: t('ide.activity.groups') };
+  }
+});
+</script>
diff --git a/packages/web/src/components/ide/ProjectTree.vue b/packages/web/src/components/ide/ProjectTree.vue
new file mode 100644
index 0000000..29502f1
--- /dev/null
+++ b/packages/web/src/components/ide/ProjectTree.vue
@@ -0,0 +1,69 @@
+<template>
+  <div class="flex h-full min-h-0 flex-col">
+    <div class="flex items-center gap-1 px-3 py-2 text-[11px] font-semibold tracking-wide text-fg-subtle uppercase">
+      {{ t('ide.projects') }}
+      <button
+        type="button"
+        class="ml-auto rounded p-0.5 hover:bg-surface-2 hover:text-fg"
+        :title="t('repos.scan')"
+        :disabled="scanning"
+        @click="onScan"
+      >
+        <ScanSearch :size="14" />
+      </button>
+      <button type="button" class="rounded p-0.5 hover:bg-surface-2 hover:text-fg" :title="t('ide.addProject')" @click="showPicker = true">
+        <Plus :size="14" />
+      </button>
+    </div>
+
+    <div class="min-h-0 flex-1 overflow-auto pb-2">
+      <p v-if="repos.length === 0" class="px-3 py-2 text-xs text-fg-subtle">{{ t('ide.noProjects') }}</p>
+      <ProjectTreeNode v-for="repo in repos" :key="repo.id" :repo="repo" />
+    </div>
+
+    <DirectoryPicker v-if="showPicker" mode="repo" :initial-path="''" @select="onPick" @close="showPicker = false" />
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed, ref } from 'vue';
+import { useI18n } from 'vue-i18n';
+import { Plus, ScanSearch } from '@lucide/vue';
+import { useWorktreesStore } from '../../stores/worktrees';
+import { useToastsStore } from '../../stores/toasts';
+import ProjectTreeNode from './ProjectTreeNode.vue';
+import DirectoryPicker from '../DirectoryPicker.vue';
+
+const { t } = useI18n();
+const worktrees = useWorktreesStore();
+const toasts = useToastsStore();
+
+const showPicker = ref(false);
+const scanning = ref(false);
+
+const repos = computed(() =>
+  [...worktrees.repos].filter((r) => !r.hidden).sort((a, b) => a.label.localeCompare(b.label)),
+);
+
+async function onScan(): Promise<void> {
+  scanning.value = true;
+  try {
+    const res = await worktrees.discover();
+    toasts.success(t('repos.scanResult', res.added));
+  } catch (err) {
+    toasts.error(err);
+  } finally {
+    scanning.value = false;
+  }
+}
+
+async function onPick(path: string): Promise<void> {
+  showPicker.value = false;
+  try {
+    await worktrees.addRepo(path);
+    toasts.success(t('toast.repoAdded'));
+  } catch (err) {
+    toasts.error(err);
+  }
+}
+</script>
diff --git a/packages/web/src/components/ide/ProjectTreeNode.vue b/packages/web/src/components/ide/ProjectTreeNode.vue
new file mode 100644
index 0000000..2d920a9
--- /dev/null
+++ b/packages/web/src/components/ide/ProjectTreeNode.vue
@@ -0,0 +1,100 @@
+<template>
+  <div>
+    <!-- ligne repo (niveau projet) -->
+    <button
+      type="button"
+      class="flex w-full items-center gap-1 rounded px-2 py-1 text-left text-xs text-fg hover:bg-surface-2/60"
+      @click="ide.toggleRepo(repo.id)"
+    >
+      <component :is="repoExpanded ? ChevronDown : ChevronRight" :size="14" class="shrink-0 text-fg-subtle" />
+      <FolderGit2 :size="13" class="shrink-0 text-fg-subtle" />
+      <span class="truncate font-medium">{{ repo.label }}</span>
+      <span v-if="worktreeList.length" class="ml-auto shrink-0 text-[10px] text-fg-subtle">{{ worktreeList.length }}</span>
+    </button>
+
+    <div v-if="repoExpanded" class="pl-3">
+      <p v-if="worktreeList.length === 0" class="px-3 py-0.5 text-[11px] text-fg-subtle">{{ t('ide.noWorktrees') }}</p>
+
+      <div v-for="wt in worktreeList" :key="wt.path">
+        <!-- ligne worktree -->
+        <button
+          type="button"
+          class="flex w-full items-center gap-1 rounded px-2 py-1 text-left text-xs hover:bg-surface-2/60"
+          :class="isActiveWt(wt) ? 'bg-surface-2 text-fg' : 'text-fg-muted'"
+          @click="onWtClick(wt)"
+        >
+          <component :is="isWtExpanded(wt) ? ChevronDown : ChevronRight" :size="14" class="shrink-0 text-fg-subtle" />
+          <component :is="wt.isMain ? Home : GitBranch" :size="12" class="shrink-0 text-fg-subtle" />
+          <span class="truncate font-mono">{{ wt.branch ?? wt.head.slice(0, 7) }}</span>
+          <span v-if="isDirty(wt)" class="ml-auto shrink-0 text-amber-400" :title="t('worktrees.dirty', { n: wt.git.dirtyCount })">●</span>
+        </button>
+
+        <!-- sessions live corrélées au worktree (par cwd) -->
+        <button
+          v-for="s in sessionsFor(wt)"
+          :key="s.id"
+          type="button"
+          class="flex w-full items-center gap-1.5 rounded py-0.5 pr-2 pl-9 text-left text-[11px] hover:bg-surface-2/60"
+          :class="ide.activeDockSessionId === s.id ? 'bg-surface-2 text-fg' : 'text-fg-muted'"
+          @click="ide.openTerminal(s.id)"
+        >
+          <SessionStateBadge :session="s" />
+          <span class="truncate font-mono">{{ s.command }}</span>
+        </button>
+
+        <!-- fichiers du worktree (arbre embarqué, chargé paresseusement au dépliage) -->
+        <div v-if="isWtExpanded(wt)" class="pl-4">
+          <FileTree
+            :wt="wt.path"
+            :active="activeFileFor(wt)"
+            embedded
+            :depth="0"
+            @open="(rel) => ide.openFile(wt.repoId, wt.path, rel)"
+          />
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue';
+import { useI18n } from 'vue-i18n';
+import { ChevronDown, ChevronRight, FolderGit2, GitBranch, Home } from '@lucide/vue';
+import type { RepoSummary, SessionSummary, WorktreeSummary } from '@arboretum/shared';
+import { useIdeStore } from '../../stores/ide';
+import { useWorktreesStore } from '../../stores/worktrees';
+import { useSessionsStore } from '../../stores/sessions';
+import FileTree from '../workspace/FileTree.vue';
+import SessionStateBadge from '../SessionStateBadge.vue';
+
+const props = defineProps<{ repo: RepoSummary }>();
+const { t } = useI18n();
+const ide = useIdeStore();
+const worktrees = useWorktreesStore();
+const sessions = useSessionsStore();
+
+const repoExpanded = computed(() => ide.expandedRepoIds.includes(props.repo.id));
+const worktreeList = computed(() => worktrees.worktreesForRepo(props.repo.id));
+
+const isWtExpanded = (wt: WorktreeSummary): boolean => ide.expandedWtPaths.includes(wt.path);
+const isActiveWt = (wt: WorktreeSummary): boolean =>
+  ide.activeContext?.repoId === wt.repoId && ide.activeContext?.wtPath === wt.path;
+const isDirty = (wt: WorktreeSummary): boolean => wt.git.dirtyCount > 0;
+
+// sessions vivantes dont le cwd correspond au worktree (corrélation par répertoire).
+function sessionsFor(wt: WorktreeSummary): SessionSummary[] {
+  return sessions.sessions.filter((s) => s.live && s.cwd === wt.path);
+}
+
+// fichier actif si l'onglet éditeur courant appartient à ce worktree.
+function activeFileFor(wt: WorktreeSummary): string | null {
+  const tab = ide.activeTab;
+  return tab && tab.repoId === wt.repoId && tab.wtPath === wt.path ? tab.file : null;
+}
+
+function onWtClick(wt: WorktreeSummary): void {
+  ide.setActiveWorktree(wt.repoId, wt.path);
+  ide.toggleWt(wt.path);
+}
+</script>
diff --git a/packages/web/src/components/ide/StatusBar.vue b/packages/web/src/components/ide/StatusBar.vue
new file mode 100644
index 0000000..19e6cf5
--- /dev/null
+++ b/packages/web/src/components/ide/StatusBar.vue
@@ -0,0 +1,51 @@
+<template>
+  <footer
+    class="flex h-[var(--ide-statusbar-h)] shrink-0 items-center gap-3 border-t border-border bg-surface-1 px-3 text-[11px] text-fg-muted"
+  >
+    <span class="flex items-center gap-1.5" :title="wsStatus">
+      <span class="h-2 w-2 rounded-full" :class="wsDot" />
+      {{ t('common.appName') }}
+    </span>
+    <GitStatusBadge v-if="activeWt" :git="activeWt.git" :branch="activeWt.branch" />
+    <span v-else class="text-fg-subtle">{{ t('ide.ready') }}</span>
+    <button
+      type="button"
+      class="ml-auto rounded px-1.5 py-0.5 transition-colors hover:bg-surface-2 hover:text-fg"
+      :class="ide.bottomVisible ? 'text-fg' : ''"
+      :title="t('ide.terminals')"
+      @click="ide.toggleBottom()"
+    >
+      <span class="inline-flex items-center gap-1"><SquareTerminal :size="12" /> {{ dockCount }}</span>
+    </button>
+  </footer>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue';
+import { useI18n } from 'vue-i18n';
+import { SquareTerminal } from '@lucide/vue';
+import { useIdeStore } from '../../stores/ide';
+import { useWorktreesStore } from '../../stores/worktrees';
+import { wsClient } from '../../lib/ws-client';
+import GitStatusBadge from '../workspace/GitStatusBadge.vue';
+
+const { t } = useI18n();
+const ide = useIdeStore();
+const worktrees = useWorktreesStore();
+
+const activeWt = computed(() => {
+  const c = ide.activeContext;
+  if (!c) return null;
+  return worktrees.worktrees.find((w) => w.repoId === c.repoId && w.path === c.wtPath) ?? null;
+});
+
+const wsStatus = computed(() => wsClient.status.value);
+const wsDot = computed(() =>
+  wsStatus.value === 'open'
+    ? 'bg-emerald-500'
+    : wsStatus.value === 'reconnecting' || wsStatus.value === 'connecting'
+      ? 'bg-amber-500'
+      : 'bg-zinc-600',
+);
+const dockCount = computed(() => ide.dockSessionIds.length);
+</script>
diff --git a/packages/web/src/components/workspace/FileTree.vue b/packages/web/src/components/workspace/FileTree.vue
index 3428cef..682c0af 100644
--- a/packages/web/src/components/workspace/FileTree.vue
+++ b/packages/web/src/components/workspace/FileTree.vue
@@ -1,12 +1,12 @@
 <template>
-  <div class="flex h-full flex-col">
-    <div class="flex items-center gap-1 px-2 py-1 text-[11px] font-semibold uppercase tracking-wide text-zinc-500">
+  <div :class="embedded ? '' : 'flex h-full flex-col'">
+    <div v-if="!embedded" class="flex items-center gap-1 px-2 py-1 text-[11px] font-semibold uppercase tracking-wide text-zinc-500">
       <FolderTree :size="13" /> {{ t('workspace.files') }}
       <button type="button" class="ml-auto rounded p-0.5 hover:bg-zinc-800 hover:text-zinc-300" :title="t('common.refresh')" @click="load">
         <RefreshCw :size="12" />
       </button>
     </div>
-    <div class="min-h-0 flex-1 overflow-auto px-1 pb-2">
+    <div :class="embedded ? '' : 'min-h-0 flex-1 overflow-auto px-1 pb-2'">
       <p v-if="loading" class="px-2 py-1 text-xs text-zinc-600">{{ t('fs.loading') }}</p>
       <p v-else-if="error" class="px-2 py-1 text-xs text-rose-400">{{ error }}</p>
       <p v-else-if="entries.length === 0" class="px-2 py-1 text-xs text-zinc-600">{{ t('fs.empty') }}</p>
@@ -15,7 +15,7 @@
         :key="e.path"
         :entry="e"
         :wt="wt"
-        :depth="0"
+        :depth="depth"
         :active="active"
         @open="(p) => emit('open', p)"
       />
@@ -31,7 +31,10 @@ import type { FsEntry, FsListResponse } from '@arboretum/shared';
 import { api } from '../../lib/api';
 import FileTreeNode from './FileTreeNode.vue';
 
-const props = defineProps<{ wt: string; active: string | null }>();
+const props = withDefaults(defineProps<{ wt: string; active: string | null; embedded?: boolean; depth?: number }>(), {
+  embedded: false,
+  depth: 0,
+});
 const emit = defineEmits<{ open: [relPath: string] }>();
 const { t } = useI18n();
 
diff --git a/packages/web/src/composables/useNav.ts b/packages/web/src/composables/useNav.ts
index 56f6912..02d1bae 100644
--- a/packages/web/src/composables/useNav.ts
+++ b/packages/web/src/composables/useNav.ts
@@ -1,7 +1,7 @@
 import { computed, type Component } from 'vue';
 import { useRoute, type RouteLocationRaw } from 'vue-router';
 import { useI18n } from 'vue-i18n';
-import { Boxes, Coffee, GitBranch, LifeBuoy, Settings, TerminalSquare } from '@lucide/vue';
+import { Boxes, Coffee, GitBranch, LifeBuoy, PanelsTopLeft, Settings, TerminalSquare } from '@lucide/vue';
 import { useSessionsStore } from '../stores/sessions';
 import GiteaIcon from '../components/ui/GiteaIcon.vue';
 import { BUYMEACOFFEE_URL, REPO_SOURCE_URL } from '../lib/constants';
@@ -31,6 +31,7 @@ export function useNav() {
 
   // Onglets principaux : barre du bas mobile + haut de sidebar.
   const primary = computed<NavEntry[]>(() => [
+    { key: 'ide', to: { name: 'ide' }, icon: PanelsTopLeft, label: t('nav.ide'), match: ['ide', 'workspace'], badge: 0 },
     { key: 'worktrees', to: { name: 'dashboard' }, icon: GitBranch, label: t('nav.worktrees'), match: ['dashboard'], badge: 0 },
     { key: 'sessions', to: { name: 'sessions' }, icon: TerminalSquare, label: t('nav.sessions'), match: ['sessions', 'session'], badge: waitingCount.value },
     { key: 'groups', to: { name: 'groups' }, icon: Boxes, label: t('nav.groups'), match: ['groups', 'group'], badge: 0 },
diff --git a/packages/web/src/i18n/en.ts b/packages/web/src/i18n/en.ts
index fbf2f1d..44c0442 100644
--- a/packages/web/src/i18n/en.ts
+++ b/packages/web/src/i18n/en.ts
@@ -218,6 +218,27 @@ export default {
     noSession: 'No session here',
     noSessionHint: 'Start a session on this worktree from the dashboard to get a terminal.',
   },
+  ide: {
+    projects: 'Projects',
+    addProject: 'Add project',
+    noProjects: 'No project yet. Add one to get started.',
+    noWorktrees: 'No worktree',
+    activity: {
+      explorer: 'Explorer',
+      git: 'Git',
+      sessions: 'Sessions',
+      groups: 'Groups',
+    },
+    startClaude: 'Start Claude',
+    startBash: 'Start bash',
+    noFileOpen: 'No file open',
+    noFileHint: 'Pick a file in the tree to edit it, or a changed file to view its diff.',
+    terminals: 'Terminals',
+    noTerminal: 'No terminal open',
+    noTerminalHint: 'Open a Claude session from the tree to attach a terminal here.',
+    comingSoon: 'Coming soon',
+    ready: 'Ready',
+  },
   editor: {
     save: 'Save',
     unsaved: 'Unsaved changes',
@@ -332,6 +353,7 @@ export default {
     reconnecting: 'Connection lost. Reconnecting…',
   },
   nav: {
+    ide: 'IDE',
     worktrees: 'Worktrees',
     sessions: 'Sessions',
     groups: 'Groups',
diff --git a/packages/web/src/i18n/fr.ts b/packages/web/src/i18n/fr.ts
index dece2d2..1942f1a 100644
--- a/packages/web/src/i18n/fr.ts
+++ b/packages/web/src/i18n/fr.ts
@@ -220,6 +220,27 @@ const fr: typeof en = {
     noSession: 'Aucune session ici',
     noSessionHint: 'Lancez une session sur ce worktree depuis le tableau de bord pour obtenir un terminal.',
   },
+  ide: {
+    projects: 'Projets',
+    addProject: 'Ajouter un projet',
+    noProjects: 'Aucun projet pour l’instant. Ajoutez-en un pour démarrer.',
+    noWorktrees: 'Aucun worktree',
+    activity: {
+      explorer: 'Explorateur',
+      git: 'Git',
+      sessions: 'Sessions',
+      groups: 'Groupes',
+    },
+    startClaude: 'Lancer Claude',
+    startBash: 'Lancer bash',
+    noFileOpen: 'Aucun fichier ouvert',
+    noFileHint: 'Choisissez un fichier dans l’arbre pour l’éditer, ou un fichier modifié pour voir son diff.',
+    terminals: 'Terminaux',
+    noTerminal: 'Aucun terminal ouvert',
+    noTerminalHint: 'Ouvrez une session Claude depuis l’arbre pour y attacher un terminal.',
+    comingSoon: 'Bientôt disponible',
+    ready: 'Prêt',
+  },
   editor: {
     save: 'Enregistrer',
     unsaved: 'Modifications non enregistrées',
@@ -335,6 +356,7 @@ const fr: typeof en = {
     reconnecting: 'Connexion perdue. Reconnexion…',
   },
   nav: {
+    ide: 'IDE',
     worktrees: 'Worktrees',
     sessions: 'Sessions',
     groups: 'Groupes',
diff --git a/packages/web/src/router/index.ts b/packages/web/src/router/index.ts
index f90760d..df6b565 100644
--- a/packages/web/src/router/index.ts
+++ b/packages/web/src/router/index.ts
@@ -17,6 +17,7 @@ export const router = createRouter({
     { path: '/', name: 'dashboard', component: () => import('../views/DashboardView.vue'), meta: { layout: 'shell' } },
     { path: '/sessions', name: 'sessions', component: () => import('../views/SessionsListView.vue'), meta: { layout: 'shell' } },
     { path: '/sessions/:id', name: 'session', component: () => import('../views/SessionView.vue'), meta: { layout: 'fullbleed' } },
+    { path: '/ide', name: 'ide', component: () => import('../components/ide/IdeShell.vue'), meta: { layout: 'ide' } },
     { path: '/workspace/:repoId/:wt', name: 'workspace', component: () => import('../views/WorkspaceView.vue'), meta: { layout: 'ide' } },
     { path: '/groups', name: 'groups', component: () => import('../views/GroupsListView.vue'), meta: { layout: 'shell' } },
     { path: '/groups/:id', name: 'group', component: () => import('../views/GroupView.vue'), meta: { layout: 'shell' } },
diff --git a/packages/web/src/stores/ide.ts b/packages/web/src/stores/ide.ts
index 5d7d3e7..8d4aba6 100644
Binary files a/packages/web/src/stores/ide.ts and b/packages/web/src/stores/ide.ts differ
diff --git a/packages/web/test/ide-store.test.ts b/packages/web/test/ide-store.test.ts
index 94d6fa2..846ab0f 100644
--- a/packages/web/test/ide-store.test.ts
+++ b/packages/web/test/ide-store.test.ts
@@ -122,18 +122,21 @@ describe('store IDE', () => {
     expect(ide.leftVisible).toBe(true);
   });
 
-  it('pruneDeadResources retire onglets/terminaux morts et reset dirty', () => {
+  it('pruneDeadResources retire onglets/terminaux morts ; dirty gardé pour les conservés, nettoyé pour les retirés', () => {
     const ide = useIdeStore();
-    ide.openFile('r', '/w1', 'a');
-    ide.openFile('r', '/w2', 'b');
+    ide.openFile('r', '/w1', 'a'); // worktree connu -> gardé
+    ide.openFile('r', '/w2', 'b'); // worktree inconnu -> retiré
     ide.setTabDirty(tabId('r', '/w1', 'a'), true);
+    ide.setTabDirty(tabId('r', '/w2', 'b'), true);
     ide.openTerminal('sLive');
     ide.openTerminal('sDead');
 
     ide.pruneDeadResources(new Set(['sLive']), new Set([wtKey('r', '/w1')]));
 
-    expect(ide.editorTabs.map((t) => t.wtPath)).toEqual(['/w1']); // /w2 inconnu -> retiré
+    expect(ide.editorTabs.map((t) => t.wtPath)).toEqual(['/w1']);
     expect(ide.dockSessionIds).toEqual(['sLive']); // sDead retiré
-    expect(ide.hasUnsaved).toBe(false); // dirty remis à zéro
+    expect(ide.isDirty(tabId('r', '/w1', 'a'))).toBe(true); // onglet gardé : dirty conservé
+    expect(ide.isDirty(tabId('r', '/w2', 'b'))).toBe(false); // onglet retiré : dirty nettoyé
+    expect(ide.hasUnsaved).toBe(true); // il reste l'onglet /w1 modifié
   });
 });