feat(shared-ui): add FilterDropdown export and InputBar FAB support

- Export FilterDropdown and FilterDropdownOption from molecules
- Add hasFabLeft prop to InputBar for left-side FAB spacing
- Minor ThemePage formatting fix

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/shared-theme-ui/src/pages/ThemePage.svelte

@@ -1,5 +1,10 @@
 <script lang="ts">
-	import type { ThemeVariant, ThemeMode, A11yStore } from '@manacore/shared-theme';
+	import type {
+		ThemeVariant,
+		ThemeMode,
+		A11yStore,
+		UserSettingsStore,
+	} from '@manacore/shared-theme';
 	import { ArrowLeft, Sun, Moon, Desktop } from '@manacore/shared-icons';
 	import type { ThemeCardData, ThemePageTranslations, A11yTranslations } from '../types';
 	import { defaultTranslations, defaultA11yTranslations } from '../types';