feat(ui): localize UI strings

Converts hardcoded UI copy to i18n keys across the app, adds global translation for non-component modules, and splits the English catalog into feature modules with duplicate-key detection.

packages/ui/src/lib/i18n/messages/en/folderSelection.ts

@@ -0,0 +1,34 @@
+export const folderSelectionMessages = {
+  "folderSelection.logoAlt": "CodeNomad logo",
+  "folderSelection.tagline": "Select a folder to start coding with AI",
+
+  "folderSelection.links.github": "CodeNomad GitHub",
+  "folderSelection.links.githubStars": "CodeNomad GitHub Stars",
+  "folderSelection.links.discord": "CodeNomad Discord",
+
+  "folderSelection.empty.title": "No Recent Folders",
+  "folderSelection.empty.description": "Browse for a folder to get started",
+
+  "folderSelection.recent.title": "Recent Folders",
+  "folderSelection.recent.subtitle.one": "{count} folder available",
+  "folderSelection.recent.subtitle.other": "{count} folders available",
+  "folderSelection.recent.remove": "Remove from recent",
+
+  "folderSelection.browse.title": "Browse for Folder",
+  "folderSelection.browse.subtitle": "Select any folder on your computer",
+  "folderSelection.browse.button": "Browse Folders",
+  "folderSelection.browse.buttonOpening": "Opening...",
+
+  "folderSelection.advancedSettings": "Advanced Settings",
+
+  "folderSelection.hints.navigate": "Navigate",
+  "folderSelection.hints.select": "Select",
+  "folderSelection.hints.remove": "Remove",
+  "folderSelection.hints.browse": "Browse",
+
+  "folderSelection.loading.title": "Starting instance...",
+  "folderSelection.loading.subtitle": "Hang tight while we prepare your workspace.",
+
+  "folderSelection.dialog.title": "Select Workspace",
+  "folderSelection.dialog.description": "Select workspace to start coding.",
+} as const