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/README.md

@@ -1,26 +1,26 @@
 # Arboretum for VS Code
 
-Pilot your git **worktrees** and **Claude Code sessions** from inside VS Code — a real native
+Pilot your git **worktrees** and **Claude Code sessions** from inside VS Code: a real native
 integration on top of the [Arboretum](https://git.lidge.fr/johanleroy/arboretum) daemon, not a webview.
 
 - **Live tree** of Repositories → Worktrees → Sessions (and a Groups view), updated in real time over
   the daemon's WebSocket.
 - **Native terminals**: attach to any session in a real VS Code terminal (a `Pseudoterminal` bridges the
-  daemon's PTY) — you get VS Code's own rendering, scrollback, copy/paste and links for free.
+  daemon's PTY): you get VS Code's own rendering, scrollback, copy/paste and links for free.
 - **Waiting alerts**: a status-bar counter and native notifications when a Claude session is waiting for
-  input — answer **Yes/No** without even opening the terminal (uses the daemon's `answer` command).
-- **Git mutations** from the tree: create worktree, commit, push, fetch, pull, promote to main — with a
+  input: answer **Yes/No** without even opening the terminal (uses the daemon's `answer` command).
+- **Git mutations** from the tree: create worktree, commit, push, fetch, pull, promote to main, with a
   **detailed git status** on each worktree (staged / unstaged / conflicts and the last commit subject).
 - **Open Worktree IDE**: jump from any worktree to its full `/workspace` view (file tree, Monaco editor,
   inline diffs, integrated terminal) in the browser. The extension stays a lightweight visual worktree
-  manager — the heavy editing lives in the web IDE.
+  manager: the heavy editing lives in the web IDE.
 - **Workspace-aware**: the worktree matching your open folder is highlighted; start a session or create a
   worktree for the current folder in one command.
 
 ## Requirements
 
 - A running Arboretum daemon (`npx @johanleroy/git-arboretum`, or installed as a user service via
-  `arboretum install`). The extension is a **client** — it does not start the daemon.
+  `arboretum install`). The extension is a **client**: it does not start the daemon.
 - An access token. The bootstrap token is printed once on first daemon start; you can also create one in
   the Arboretum dashboard (**Settings → Tokens**).
 
@@ -41,7 +41,7 @@ integration on top of the [Arboretum](https://git.lidge.fr/johanleroy/arboretum)
 | `arboretum.notifyOnWaiting` | `true` | Native notification when a session starts waiting for input. |
 
 The extension authenticates with `Authorization: Bearer <token>` on both REST and the WebSocket upgrade.
-For remote access, point `arboretum.url` at your Tailscale Serve URL (`https://…`) — the WebSocket is
+For remote access, point `arboretum.url` at your Tailscale Serve URL (`https://…`): the WebSocket is
 derived automatically (`wss://`).
 
 ## Building & packaging (private VSIX)