Add foundational components and logic for migration, UI design, and input handling

- Introduced foundational UI components (`Badge`, `LockCard`, `SectionHeader`, `AvatarIcon`, etc.) for flexible layouts and consistent design.
- Added migration support with the `MigrationModal` component and backend integration for exporting/importing data between Electron and Tauri.
- Extended form components with `TextAreaInput`, `OrderInput`, `ToggleField`, and `ToolbarSelect` for improved input handling.
- Updated `ScribeShell` with migration popup logic to prompt users for data migration.
- Integrated `AlertStack` for better alert handling and notification management.
- Enhanced Rust/Tauri services with migration command implementations.
- Added translations and styles for new components.

lib/tauri.ts

@@ -677,6 +677,29 @@ export async function applySeriesTombstones(tombstones: TombstoneRecord[]): Prom
     return invoke<void>('apply_series_tombstones', {tombstones});
 }
 
+// ─── Migration ────────────────────────────────────────────────
+
+export interface MigrationCheckResult {
+    found: boolean;
+    userId: string | null;
+    hasDb: boolean;
+    migrationPath: string | null;
+}
+
+export interface MigrationResult {
+    success: boolean;
+    userId: string | null;
+    error: string | null;
+}
+
+export async function checkElectronMigration(migrationFilePath: string): Promise<MigrationCheckResult> {
+    return invoke<MigrationCheckResult>('check_electron_migration', {migrationFilePath});
+}
+
+export async function importFromElectron(migrationFilePath: string): Promise<MigrationResult> {
+    return invoke<MigrationResult>('import_from_electron', {data: {migrationFilePath}});
+}
+
 // ─── Window Management ──────────────────────────────────────
 
 let loginWindowOpening = false;