Baseline: full tree snapshot after git repository loss

The previous .git directory was found gutted (only info/ remained), so
history is unrecoverable locally. This commit restores version control
with the tree exactly as it stands: the working app, the preview-tracks
launcher on the artist hero, the scrollable-track-previews design bundle
(docs + approved mockups), and the Phase 0 validation artifacts.

src-tauri/src/lib.rs

@@ -0,0 +1,127 @@
+mod commands;
+mod config;
+mod cover_logo;
+mod hero_crop;
+mod hero_detector;
+mod pipeline;
+mod playback;
+mod state;
+
+#[cfg_attr(mobile, tauri::mobile_entry_point)]
+pub fn run() {
+    tauri::Builder::default()
+        .manage(state::AppState::default())
+        .setup(|app| {
+            app.handle().plugin(
+                tauri_plugin_log::Builder::default()
+                    .level(log::LevelFilter::Info)
+                    .clear_targets()
+                    .target(tauri_plugin_log::Target::new(
+                        tauri_plugin_log::TargetKind::Stdout,
+                    ))
+                    .build(),
+            )?;
+            app.handle().plugin(tauri_plugin_dialog::init())?;
+            // Must run before anything touches the app-data dir.
+            config::migrate_app_data(app.handle());
+            // Prepare the small local vision model while the user is still on
+            // the app shell, so a first artist visit pays only warm inference.
+            hero_detector::warm_up(app.handle().clone());
+            playback::init(app.handle());
+            playback::prune_cache(app.handle());
+            if let Err(e) = pipeline::init(app.handle()) {
+                log::error!("library init failed: {e}");
+            }
+            Ok(())
+        })
+        .invoke_handler(tauri::generate_handler![
+            commands::app_status,
+            commands::excluded_search_phrases,
+            commands::get_credentials,
+            commands::connect_and_login,
+            commands::connect_stored,
+            commands::disconnect,
+            commands::start_search,
+            commands::stop_search,
+            commands::download_file,
+            commands::copy_stream_to_folder,
+            commands::save_to_library,
+            commands::cancel_download,
+            commands::show_in_folder,
+            commands::refresh_artist_art,
+            commands::play_stream,
+            commands::play_local,
+            commands::preload_local,
+            commands::player_control,
+            commands::waveform,
+            commands::library_albums,
+            commands::album_tracks,
+            commands::album_art,
+            commands::refresh_album_art,
+            commands::refresh_all_album_art,
+            commands::get_settings,
+            commands::set_settings,
+            commands::forget_credentials,
+            commands::pick_folder,
+            commands::open_external,
+            commands::record_play,
+            commands::add_play_seconds,
+            commands::artist_play_stats,
+            commands::list_playlists,
+            commands::create_playlist,
+            commands::delete_playlist,
+            commands::playlist_tracks,
+            commands::add_to_playlist,
+            commands::remove_from_playlist,
+            commands::catalog_search,
+            commands::catalog_artist,
+            commands::catalog_artist_art,
+            commands::catalog_artist_logos,
+            commands::catalog_artist_identity,
+            commands::catalog_artist_socials,
+            commands::catalog_artist_bio,
+            commands::catalog_cached_cover_logo,
+            commands::catalog_cover_logo,
+            commands::catalog_cover_logo_debug,
+            commands::catalog_ocr_experiment,
+            commands::catalog_artist_hero_seed,
+            commands::catalog_artist_overview,
+            commands::pick_artist_hero,
+            commands::clear_artist_hero,
+            commands::catalog_related,
+            commands::catalog_album,
+            commands::catalog_album_info,
+            commands::catalog_art,
+            commands::catalog_cover,
+            commands::invalidate_catalog_cover,
+            commands::catalog_hero_preview,
+            commands::catalog_hero_gpu_source,
+            commands::catalog_cached_hero_art,
+            commands::catalog_hero_art,
+            commands::preload_stream,
+            commands::preload_cached_stream,
+            commands::stream_waveform,
+        ])
+        .run({
+            #[allow(unused_mut)]
+            let mut context = tauri::generate_context!();
+            // Debug builds expose CDP on 9222 for instrumentation (see HANDOFF.md).
+            // wry always sets AdditionalBrowserArguments programmatically, so the
+            // WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS env var is ignored; the flag has
+            // to go through the window config. Explicit args replace wry's defaults,
+            // so those are restated here.
+            #[cfg(debug_assertions)]
+            {
+                for window in &mut context.config_mut().app.windows {
+                    window.additional_browser_args = Some(
+                        "--disable-features=msWebOOUI,msPdfOOUI,msSmartScreenProtection \
+                         --autoplay-policy=no-user-gesture-required \
+                         --remote-debugging-port=9222"
+                            .into(),
+                    );
+                }
+            }
+            context
+        })
+        .expect("error while running tauri application");
+}