feat(site): showcase IDE workspace, diff/staging et services git distants

- WorkspaceShowcase.vue : maquette fidèle de la vue /workspace (arbre de
  fichiers + panneau commit staging/amend + diff coloré + terminal corrélé).
- RemoteGitSection.vue : connexions GitHub/GitLab/Gitea (chiffrées at-rest)
  + barre de progression de clone.
- 5 cartes features, pilier sécurité « Encrypted secrets », 3 FAQ, ancre nav.
- i18n EN/FR à parité ; meta description orientée IDE. Bump 0.2.0.

packages/site/src/i18n/en.ts

@@ -1,6 +1,7 @@
 // Messages EN — copie fidèle du dict() du design Arboretum.dc.html.
 export default {
   navFeatures: 'Features',
+  navWorkspace: 'Workspace',
   navHow: 'How it works',
   navSecurity: 'Security',
   navFaq: 'FAQ',
@@ -106,4 +107,52 @@ export default {
   copied: 'Copied',
   copyCommand: 'Copy command',
   copyUrl: 'Copy URL',
+
+  // New feature cards (P7→P12: IDE worktree)
+  feat11Title: 'A real IDE for every worktree',
+  feat11Desc: 'Browse the file tree, edit in a full Monaco editor, and read changes as inline diffs — all in the /workspace view.',
+  feat12Title: 'Diff & selective staging',
+  feat12Desc: 'Stage, unstage or discard file by file, then commit (all or staged), amend, fetch and pull — without leaving the dashboard.',
+  feat13Title: 'Remote git services',
+  feat13Desc: 'Connect GitHub, GitLab or Gitea with a PAT or app password — credentials encrypted at rest — and clone over HTTPS with live progress.',
+  feat14Title: 'Auto-archive sessions',
+  feat14Desc: 'Finished sessions are archived automatically after a configurable retention window (30 days by default), keeping the list clean.',
+  feat15Title: 'Real-time file sync',
+  feat15Desc: 'A filesystem watcher streams changes the moment a file moves on disk — diffs and status update live, no refresh needed.',
+
+  // Workspace IDE showcase
+  wsKicker: 'The worktree IDE',
+  wsTitle: 'A full IDE for every worktree, in the browser',
+  wsBody:
+    'Open any worktree in /workspace: a file tree on the left, a Monaco editor and inline diff in the center, and the correlated session terminal on the right. Stage changes file by file, write a commit message, push — all without leaving the page, on any device.',
+  wsEditor: 'Editor',
+  wsDiff: 'Diff',
+  wsFiles: 'Files',
+  wsChanges: 'Changes',
+  wsStaged: 'Staged',
+  wsTerminal: 'Terminal',
+  wsCommitMsg: 'Implement token refresh',
+  wsCommitPlaceholder: 'Commit message…',
+  wsAmend: 'Amend last commit',
+  wsCommitBtn: 'Commit',
+  wsPushBtn: 'Push',
+  wsStage: 'Stage',
+  wsUnstage: 'Unstage',
+  wsDiscard: 'Discard',
+
+  // Remote git services + clone
+  rgKicker: 'Remote git · encrypted',
+  rgTitle: 'Connect your git services and clone in a click',
+  rgBody:
+    'Add GitHub, GitLab or Gitea connections with a personal access token or app password. Secrets are encrypted at rest (AES-256-GCM) and never returned in clear by the API. Browse remote repos and clone over HTTPS with live progress.',
+  rgConnections: 'Connections',
+  rgTested: 'tested',
+  rgAddConnection: 'Add connection',
+  rgEncrypted: 'Encrypted at rest',
+  rgCloning: 'Cloning',
+  rgCloneReceiving: 'Receiving objects',
+
+  // Security pillar (encrypted secrets)
+  sec5Title: 'Encrypted secrets',
+  sec5Desc: 'Remote git credentials are encrypted at rest (AES-256-GCM) and never returned in clear by the API.',
 };