release v2.8.0

The i18n epic (T-462): every user-facing label — panels, dialogs, command
palette, menus, settings, framework chrome — now resolves through the i18n
catalog instead of a hardcoded string. Catalogs are bundled per locale under
assets/i18n/<locale>/<namespace>.json. Adds a live UI-language selector
(Settings → Appearance → Language) and a full Dutch (nl-NL) pack; English
stays the default. Architecture in D-102.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

assets/licenses.yaml

@@ -39,7 +39,7 @@ self:
   # Auto-synced from pubspec.yaml `version:` by `make gen-build-info`
   # (runs implicitly on every build/run/test). Don't hand-edit; bump
   # pubspec instead.
-  version: "2.7.1"
+  version: "2.8.0"
   homepage: https://github.com/postmeridiem/clide
   license: MIT
   license_file: assets/LICENSE