feat: 10-band EQ, connection indicator, new icon (v1.5.0)

### 10-Band Graphic Equalizer
- Full EQ in Rust audio engine via EqSource<S> biquad peak filters
- 10 built-in presets + custom preset save/delete
- EqSource::try_seek() implemented — also fixes waveform seek which broke
  silently when EQ was introduced (rodio returned SeekError::NotSupported)
- EQ state persisted in localStorage, synced to Rust on startup

### Connection Indicator
- LED in header (green/red/pulsing) with server name and LAN/WAN label
- Offline overlay with retry button when server is unreachable
- useConnectionStatus hook

### New App Icon
- New logo (logo-psysonic.png) applied across Login, Sidebar, Settings,
  README and all Tauri platform icons (Windows, macOS, Linux, Android, iOS)

### Now Playing Page
- New /now-playing route added

### Fixes
- WaveformSeek: mousemove/mouseup on window to fix drag outside canvas

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -117,7 +117,7 @@ Add a function to `src/api/subsonic.ts` using the `api<T>()` helper. The helper
 **Light-theme gotcha**: The Hero and Fullscreen Player sit on top of album-art backgrounds with dark overlays. Their text colors are hardcoded white (not `var(--text-primary)`) so they stay readable in light themes (Latte, Nord Snowstorm).
 
 ### Artists page — initial avatars
-Artist images are intentionally **not loaded** on the Artists overview page (grid + list view) to avoid slow server disk I/O on large libraries. Instead, each artist gets a colour-coded initial avatar: first letter of the name (skipping leading punctuation/numbers), colour deterministically hashed from the name using Catppuccin palette variables. Artist images are still loaded on the individual ArtistDetail page (cached via IndexedDB).
+Artist images are intentionally **not loaded** on the Artists overview page (grid + list view) to avoid slow server disk I/O on large libraries. Instead, each artist gets a colour-coded initial avatar: first letter of the name (skipping leading punctuation/numbers), colour deterministically hashed from the name using Catppuccin palette variables. Artist images are still loaded on the individual ArtistDetail page (cached via IndexedDB). In the grid view, the initial avatar is a **circle** (`border-radius: 50%`, `border: 2px solid` with the accent colour) centred inside the card. Name and album count below are centre-aligned.
 
 ### Artist cards
 `ArtistCardLocal` uses the same structure as `AlbumCard`: no padding, full-width square cover via `aspect-ratio: 1`, info below. Both use `flex: 0 0 clamp(140px, 15vw, 180px)` inside `.album-grid` so they stay the same size as album cards.
@@ -167,12 +167,13 @@ The workflow is split into three jobs: `create-release` (creates the GitHub Rele
 - **Drag-and-drop cursor (Linux)**: WebKitGTK does not honour `dropEffect` for cursor display — the cursor may show as forbidden or no indicator depending on the compositor (KDE Plasma vs GNOME). DnD works correctly regardless. This is a known WebKitGTK limitation, not fixable from web content.
 - **Fullscreen Player ("Ambient Stage")**: Single centered column — no tracklist. Background uses the artist's `largeImageUrl` from `getArtistInfo()` (falls back to cover art). Three CSS-animated color orbs (`--ctp-mauve`, `--ctp-blue`, `--ctp-lavender`) drift behind everything. Cover has a slow breathing animation (`cover-breathe` keyframe). Long song titles scroll as a marquee (`MarqueeTitle` component — measures overflow via `getBoundingClientRect` + `ResizeObserver`, animates via CSS custom property `--scroll-amount`). `Track.artistId` is populated from `SubsonicSong.artistId` (Navidrome returns this field) across all 18 track-construction sites.
 - **Sidebar**: Fixed width via CSS `clamp(200px, 15vw, 220px)` — no drag-to-resize. Collapsed state (72px) persisted in `localStorage`. Update notification uses Tauri Shell plugin `open()` to launch the system browser — `<a target="_blank">` does not work inside a Tauri WebView.
+- **Artist page — external links**: Last.fm and Wikipedia buttons open in the system browser via `open()` from `@tauri-apps/plugin-shell`. Button label temporarily changes to "Opened in browser" / "Im Browser geöffnet" for 2.5 s as visual confirmation.
 - **Tracklist columns**: Order is `# | Title | [Artist (VA only)] | Favorite | Rating | Duration | Format`. Format column uses `120px` (NOT `auto` or `1fr`) — `auto` caused misalignment because header and track-row are independent grid containers: "FORMAT" header text is narrower than "MP3 · 320 kbps", so the `fr` title column calculated differently in header vs rows, shifting all subsequent columns. `1fr` fixed alignment but made the format column too wide. Fixed `120px` fits all codec strings (MP3/FLAC/OGG · kbps) and aligns perfectly. Total row uses explicit `grid-column` numbers (not negative indices).
 - **AlbumDetail**: Thin orchestrator (`src/pages/AlbumDetail.tsx`) — state, handlers, `useCachedUrl` hook, renders `AlbumHeader` + `AlbumTrackList` + related albums section. Logic is split into the two extracted components.
 - **Playlists page**: List layout (not card grid) with sort buttons (Name / Tracks / Duration, toggle asc/desc) and a filter input. Play icon and delete button appear on row hover.
 - **Statistics page**: Library stat cards (Artists / Albums / Songs / Genres), Recently Played, Most Played, Highest Rated, Genre Chart. Data loaded in parallel via `Promise.allSettled`. No decade distribution (API caps byYear at 200 — all bars show "200+" which is useless).
 - **Context menu**: `song` and `queue-item` types both have "Go to Album" (`Disc3` icon, shown only when `song.albumId` exists) and "Favorite" options. Context menu type union: `'song' | 'album' | 'artist' | 'queue-item' | 'album-song'`.
-- **QueuePanel meta box**: Shows title (no link) → artist (linked to `/artist/:id`) → album (linked to `/album/:id`). Year display removed. Header shows song count + total duration below the queue title.
+- **QueuePanel meta box**: Shows title (no link) → artist (linked to `/artist/:id`) → album (linked to `/album/:id`) → year (if available). Cover art is 90×90 px, top-aligned. Default panel width 340 px. Header shows song count + total duration below the queue title.
 - **Queue hover**: Queue items use `.context-active` CSS class when their context menu is open, keeping the hover highlight visible.
 - **Random Mix hover**: Row uses `.context-active` CSS class when a context menu is open for that song. `contextMenuSongId` state cleared via `useEffect` when `contextMenu.isOpen` becomes false.
 - **Favorites songs**: Full tracklist layout matching AlbumDetail — `track-row-va` grid with `#`, Title, Artist, Duration columns and a header row. Artist name clickable → artist page. "Add all to queue" button (`btn btn-surface`) next to the section title sends all favorited songs to the queue.
@@ -181,4 +182,4 @@ The workflow is split into three jobs: `create-release` (creates the GitHub Rele
 - **RandomAlbums**: No auto-refresh timer — loads once on mount, manual refresh button only. `loadingRef` guards against concurrent fetches.
 - **Queue shuffle**: `shuffleQueue()` in playerStore keeps current track at index 0, Fisher-Yates shuffles the rest.
 - **Tooltip z-index**: `.main-content` has `z-index: 1` so tooltips in the content area render above the queue panel (which has no z-index but appears later in DOM order). Multi-line tooltips: add `data-tooltip-wrap` attribute + use `\n` in the string; CSS rule `[data-tooltip-wrap]::after { white-space: pre-line; max-width: 220px }`.
-- **Version**: 1.4.5
+- **Version**: 1.5.0