fix(shared): i18n coverage and contract updates

- keyPath field no longer tells users to enter a server-side path
- settings.highlight.builtin.* notes, timeout messages in four languages
- prototype-safe dictionary lookup; language as a render-time dependency
- Partial<AppSettings> saveSettings contract, update:stateGet channel

src/shared/i18n/dicts/en/settings.ts

@@ -98,6 +98,11 @@ const settings: Record<string, string> = {
     'Together with the global key this shows or hides the window from anywhere; if registration fails (a conflict with another app) it simply has no effect and the app reports no error.',
   'settings.system.shortcutRecording': 'Press the keys…',
   'settings.system.shortcutPlaceholder': 'Click and press a shortcut, leave empty to disable',
+  'settings.system.shortcutConflict':
+    'This shortcut is already used by the app (Ctrl+= / Ctrl+- / Ctrl+0 / Ctrl+PgUp / Ctrl+PgDn). Please choose another.',
+  'settings.resetTerminal': 'Reset terminal settings',
+  'settings.resetTerminalTitle': 'Reset terminal settings?',
+  'settings.resetTerminalDesc': 'All terminal settings — font, cursor, rendering and theme — will be restored to defaults.',
   'settings.highlight.alert':
     'Custom highlighting improves readability at a small performance cost. Rules are applied in priority order. PS: colors are injected as text is written to the terminal, so existing scrollback is unaffected',
   'settings.highlight.enabled': 'Enabled',
@@ -121,6 +126,17 @@ const settings: Record<string, string> = {
   'settings.highlight.resetOk': 'Restore',
   'settings.highlight.createTitle': 'New highlight rule',
   'settings.highlight.editTitle': 'Edit highlight rule',
+  'settings.highlight.builtin.perm': 'Linux permissions and user/group',
+  'settings.highlight.builtin.path': 'Linux file paths',
+  'settings.highlight.builtin.shellkw': 'Shell keywords and control flow',
+  'settings.highlight.builtin.okstate': 'Success states',
+  'settings.highlight.builtin.badstate': 'Error/warning states',
+  'settings.highlight.builtin.quoted': 'Strings and quotes',
+  'settings.highlight.builtin.envvar': 'Environment variables and arguments',
+  'settings.highlight.builtin.ipv4': 'Network and IP addresses',
+  'settings.highlight.builtin.datetime': 'Time and date',
+  'settings.highlight.builtin.numbers': 'Numbers and counts',
+  'settings.highlight.builtin.url': 'Web links',
   'settings.theme.accent': 'Tab accent color',
   'settings.theme.accentDesc': 'Accent color for the active tab border, the sidebar indicator, and SSH badges',
   'settings.theme.customBadge': 'Custom',