feat(vscode): statut git détaillé, sessions archivées, lien IDE web, fetch/pull (0.2.0)

Reflète la refonte IDE en supervision légère, sans dupliquer l'éditeur :
- statut git fin dans l'arbre (staged/unstaged/conflits + dernier commit) ;
- commande « Open Worktree IDE » → deep-link /workspace/:repoId/:wt ;
- commandes fetch / pull (ff-only|rebase) sur les worktrees ;
- event WS session_archived + réglage showArchivedSessions (badge + filtre).
README/CHANGELOG + tests (config/rest-client/ws-client).

packages/vscode/src/commands.ts

@@ -4,6 +4,7 @@
 import * as vscode from 'vscode';
 import type { GroupSummary, RepoSummary, SessionSummary, WorktreeSummary } from '@arboretum/shared';
 import { RestError, type RestClient } from './api/rest-client.js';
+import { workspaceUrl } from './config.js';
 import type { ArbWsClient, AttachmentSink } from './api/ws-client.js';
 import type { Store } from './state/store.js';
 import type { SessionTerminalManager } from './terminal/session-pty.js';
@@ -174,10 +175,43 @@ export function registerCommands(context: vscode.ExtensionContext, deps: Command
       }),
     );
   });
+  cmd('arboretum.fetchWorktree', (node) => {
+    const wt = asWorktree(node as AnyNode);
+    if (!wt) return;
+    void vscode.window.withProgress({ location: vscode.ProgressLocation.Notification, title: 'Arboretum: fetching…' }, () =>
+      run('fetch', async () => {
+        await rest.fetchWorktree(wt.repoId, { path: wt.worktree.path });
+        void vscode.window.showInformationMessage('Arboretum: fetched.');
+      }),
+    );
+  });
+  cmd('arboretum.pullWorktree', (node) => {
+    const wt = asWorktree(node as AnyNode);
+    if (!wt) return;
+    void run('pull', async () => {
+      const mode = await vscode.window.showQuickPick(
+        [
+          { label: 'Fast-forward only', mode: 'ff-only' as const },
+          { label: 'Rebase', mode: 'rebase' as const },
+        ],
+        { placeHolder: 'Pull strategy' },
+      );
+      if (!mode) return;
+      await vscode.window.withProgress({ location: vscode.ProgressLocation.Notification, title: 'Arboretum: pulling…' }, async () => {
+        await rest.pullWorktree(wt.repoId, { path: wt.worktree.path, mode: mode.mode });
+        void vscode.window.showInformationMessage('Arboretum: pulled.');
+      });
+    });
+  });
   cmd('arboretum.promoteWorktree', (node) => {
     const wt = asWorktree(node as AnyNode);
     if (wt) void promoteWorktreeFlow(deps, wt.repoId, wt.worktree);
   });
+  cmd('arboretum.openWorktreeIde', (node) => {
+    const wt = asWorktree(node as AnyNode);
+    if (!wt) return;
+    void vscode.env.openExternal(vscode.Uri.parse(workspaceUrl(rest.url, wt.repoId, wt.worktree.path)));
+  });
 
   // ---- démarrage de session ----
   cmd('arboretum.startSession', (node) => {