diff --git a/packages/web/src/stores/ide.ts b/packages/web/src/stores/ide.ts
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diff --git a/packages/web/test/ide-store.test.ts b/packages/web/test/ide-store.test.ts
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+// Store IDE : onglets (ouverture/dedup/fermeture), dock terminaux, activité, réconciliation.
+import { describe, it, expect, beforeEach } from 'vitest';
+import { createPinia, setActivePinia } from 'pinia';
+import { useIdeStore, tabId, wtKey } from '../src/stores/ide';
+
+function fakeStorage() {
+  const m = new Map<string, string>();
+  return {
+    getItem: (k: string) => (m.has(k) ? (m.get(k) as string) : null),
+    setItem: (k: string, v: string) => void m.set(k, v),
+    removeItem: (k: string) => void m.delete(k),
+    clear: () => m.clear(),
+  };
+}
+
+describe('store IDE', () => {
+  beforeEach(() => {
+    (globalThis as unknown as { localStorage: unknown }).localStorage = fakeStorage();
+    setActivePinia(createPinia());
+  });
+
+  it('openFile ouvre un onglet, fixe actif + contexte', () => {
+    const ide = useIdeStore();
+    ide.openFile('r1', '/wt/a', 'src/x.ts');
+    expect(ide.editorTabs).toHaveLength(1);
+    expect(ide.activeTabId).toBe(tabId('r1', '/wt/a', 'src/x.ts'));
+    expect(ide.activeContext).toEqual({ repoId: 'r1', wtPath: '/wt/a' });
+    expect(ide.activeTab?.file).toBe('src/x.ts');
+  });
+
+  it('openFile est idempotent (pas de doublon), refocalise l onglet existant', () => {
+    const ide = useIdeStore();
+    ide.openFile('r1', '/wt/a', 'x.ts');
+    ide.openFile('r1', '/wt/b', 'y.ts');
+    ide.openFile('r1', '/wt/a', 'x.ts'); // ré-ouverture
+    expect(ide.editorTabs).toHaveLength(2);
+    expect(ide.activeTabId).toBe(tabId('r1', '/wt/a', 'x.ts'));
+  });
+
+  it('closeTab recalcule l onglet actif sur le voisin', () => {
+    const ide = useIdeStore();
+    ide.openFile('r', '/w', 'a');
+    ide.openFile('r', '/w', 'b');
+    ide.openFile('r', '/w', 'c'); // actif = c
+    ide.setActiveTab(tabId('r', '/w', 'b')); // actif = b (index 1)
+    ide.closeTab(tabId('r', '/w', 'b'));
+    expect(ide.editorTabs).toHaveLength(2);
+    // le voisin qui a glissé à l index 1 est c
+    expect(ide.activeTabId).toBe(tabId('r', '/w', 'c'));
+  });
+
+  it('closeTab sur le dernier onglet vide l actif', () => {
+    const ide = useIdeStore();
+    ide.openFile('r', '/w', 'a');
+    ide.closeTab(tabId('r', '/w', 'a'));
+    expect(ide.editorTabs).toHaveLength(0);
+    expect(ide.activeTabId).toBeNull();
+  });
+
+  it('closeTabsForWorktree retire tous les onglets d un worktree', () => {
+    const ide = useIdeStore();
+    ide.openFile('r', '/w1', 'a');
+    ide.openFile('r', '/w1', 'b');
+    ide.openFile('r', '/w2', 'c');
+    ide.closeTabsForWorktree('r', '/w1');
+    expect(ide.editorTabs.map((t) => t.file)).toEqual(['c']);
+  });
+
+  it('moveTab réordonne', () => {
+    const ide = useIdeStore();
+    ide.openFile('r', '/w', 'a');
+    ide.openFile('r', '/w', 'b');
+    ide.openFile('r', '/w', 'c');
+    ide.moveTab(0, 2); // a -> fin
+    expect(ide.editorTabs.map((t) => t.file)).toEqual(['b', 'c', 'a']);
+  });
+
+  it('setTabDirty alimente hasUnsaved / isDirty', () => {
+    const ide = useIdeStore();
+    ide.openFile('r', '/w', 'a');
+    const id = tabId('r', '/w', 'a');
+    expect(ide.hasUnsaved).toBe(false);
+    ide.setTabDirty(id, true);
+    expect(ide.isDirty(id)).toBe(true);
+    expect(ide.hasUnsaved).toBe(true);
+    ide.setTabDirty(id, false);
+    expect(ide.hasUnsaved).toBe(false);
+  });
+
+  it('dock : openTerminal ajoute + focus + ouvre le dock ; sans doublon', () => {
+    const ide = useIdeStore();
+    ide.openTerminal('s1');
+    ide.openTerminal('s2');
+    ide.openTerminal('s1'); // déjà présent
+    expect(ide.dockSessionIds).toEqual(['s1', 's2']);
+    expect(ide.activeDockSessionId).toBe('s1');
+    expect(ide.bottomVisible).toBe(true);
+  });
+
+  it('dock : closeTerminal recalcule l actif et referme si vide', () => {
+    const ide = useIdeStore();
+    ide.openTerminal('s1');
+    ide.openTerminal('s2');
+    ide.focusTerminal('s2');
+    ide.closeTerminal('s2');
+    expect(ide.dockSessionIds).toEqual(['s1']);
+    expect(ide.activeDockSessionId).toBe('s1');
+    ide.closeTerminal('s1');
+    expect(ide.dockSessionIds).toEqual([]);
+    expect(ide.activeDockSessionId).toBeNull();
+    expect(ide.bottomVisible).toBe(false);
+  });
+
+  it('toggleActivity : re-clic sur la vue active replie le panneau', () => {
+    const ide = useIdeStore();
+    expect(ide.activeActivity).toBe('explorer');
+    expect(ide.leftVisible).toBe(true);
+    ide.toggleActivity('explorer'); // même vue, ouverte -> repli
+    expect(ide.leftVisible).toBe(false);
+    ide.toggleActivity('git'); // autre vue -> ouvre
+    expect(ide.activeActivity).toBe('git');
+    expect(ide.leftVisible).toBe(true);
+  });
+
+  it('pruneDeadResources retire onglets/terminaux morts et reset dirty', () => {
+    const ide = useIdeStore();
+    ide.openFile('r', '/w1', 'a');
+    ide.openFile('r', '/w2', 'b');
+    ide.setTabDirty(tabId('r', '/w1', 'a'), 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.dockSessionIds).toEqual(['sLive']); // sDead retiré
+    expect(ide.hasUnsaved).toBe(false); // dirty remis à zéro
+  });
+});