chore(typo): retire tous les tirets cadratins/demi-cadratins + garde CI

Remplace les 547 tirets cadratins (U+2014) et demi-cadratins (U+2013) des fichiers versionnés par la ponctuation contextuelle adaptée (point médian, deux-points, virgule, parenthèses ; tiret simple pour les plages), sur 122 fichiers (appli, vitrine, doc, tests, workflows, scripts).

Ajoute le job CI « lint-dashes » (git grep -P) qui échoue si un tiret cadratin/demi-cadratin réapparaît, hors logo binaire et captures brutes du terminal (fidélité des fixtures de détection de dialogue).

packages/vscode/CHANGELOG.md

@@ -3,18 +3,18 @@
 ## 0.2.0
 
 Follows the daemon's "worktree IDE" milestone (P7→P12), while keeping the extension a lightweight
-**visual worktree manager** — no editor/diff duplicated here, that lives in the web IDE:
+**visual worktree manager**: no editor/diff duplicated here, that lives in the web IDE:
 
 - **Detailed git status** in the worktree tree: staged / unstaged / conflict counts and the last commit
   subject (from the daemon's enriched `WorktreeGitStatus`).
-- **Open Worktree IDE** command — deep-links to the web `/workspace/:repoId/:wt` view.
+- **Open Worktree IDE** command: deep-links to the web `/workspace/:repoId/:wt` view.
 - **Fetch** and **Pull** (fast-forward only or rebase) commands on worktrees, alongside commit/push.
 - **Archived sessions**: the `session_archived` event is handled live; finished, auto-archived sessions
   are badged and hidden by default, with a new `arboretum.showArchivedSessions` setting to reveal them.
 
 ## 0.1.0
 
-Initial release — native VS Code integration for the Arboretum daemon:
+Initial release: native VS Code integration for the Arboretum daemon:
 
 - Real-time **Repositories** and **Groups** trees (repos → worktrees → sessions) over the daemon WebSocket.
 - **Native terminals** (`Pseudoterminal`) to attach/observe any session, reusing VS Code's rendering and