feat(shared-ui): locale-aware highlighting + success feedback for InputBar

1. Extract hardcoded German highlight patterns into locale-specific sets
   (de, en, fr, it, es). InputBar accepts `locale` or custom
   `highlightPatterns` prop, defaulting to German for backward compat.

2. Add visual success feedback after creating: input bar flashes green
   with a checkmark icon for 1.2s, confirming the action was successful.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/todo/apps/web/src/routes/(app)/+layout.svelte

@@ -398,6 +398,7 @@
 					onParseCreate={handleParseCreate}
 					createText="Erstellen"
 					deferSearch={true}
+					locale={$locale || 'de'}
 					appIcon="todo"
 					hasFabRight={true}
 					bottomOffset={isPillNavCollapsed ? '16px' : isFilterStripVisible ? '180px' : '110px'}