feat: tooltips, two-column timer, font selector, tray behavior, icons, readme

- Custom tooltip directive (WCAG AAA) on every button in the app
- Two-column timer layout with sticky hero and recent entries sidebar
- Timer font selector with 16 monospace Google Fonts and live preview
- UI font selector with 15+ Google Fonts
- Close-to-tray and minimize-to-tray settings
- New app icons (no-glow variants), platform icon set
- Mini timer pop-out window
- Favorites strip with drag-reorder and inline actions
- Comprehensive README with feature documentation
- Remove tracked files that belong in gitignore

src-tauri/src/lib.rs

@@ -6,6 +6,7 @@ use tauri::Manager;
 mod database;
 mod commands;
 mod os_detection;
+mod seed;
 
 pub struct AppState {
     pub db: Mutex<Connection>,
@@ -135,10 +136,26 @@ pub fn run() {
             commands::get_entry_templates,
             commands::create_entry_template,
             commands::delete_entry_template,
+            commands::update_entry_template,
             commands::get_timesheet_rows,
             commands::save_timesheet_rows,
             commands::get_previous_week_structure,
             commands::auto_backup,
+            commands::search_entries,
+            commands::list_backup_files,
+            commands::delete_backup_file,
+            commands::get_recent_descriptions,
+            commands::check_entry_overlap,
+            commands::get_task_actuals,
+            commands::get_invoice_payments,
+            commands::add_invoice_payment,
+            commands::delete_invoice_payment,
+            commands::get_recurring_invoices,
+            commands::create_recurring_invoice,
+            commands::update_recurring_invoice,
+            commands::delete_recurring_invoice,
+            commands::check_recurring_invoices,
+            commands::seed_sample_data,
         ])
         .setup(|app| {
             #[cfg(desktop)]
@@ -151,6 +168,7 @@ pub fn run() {
                 let menu = Menu::with_items(app, &[&show, &quit])?;
 
                 let _tray = TrayIconBuilder::new()
+                    .icon(app.default_window_icon().unwrap().clone())
                     .menu(&menu)
                     .show_menu_on_left_click(false)
                     .on_menu_event(|app, event| {