Document missing features in README

Adds previously-undocumented features to the Key Features section:
- Hydrabase P2P metadata network (dev-mode alternative to iTunes)
- Genre Whitelist for filtering junk tags across enrichment sources
- Multi-artist tagging options (separator, multi-value ARTISTS, feat-in-title)
- Live Log Viewer in Settings → Logs
- ReplayGain analysis during post-processing

Expands the Automation Engine section with more trigger examples,
multi-THEN actions (up to 3 per automation), Signal Chains cycle-
detection behavior, and Automation Groups.

Expands Mirrored Playlists to cover Auto Wing It metadata fallback
and the per-track Unmatch button with DB persistence.

README.md

@@ -84,6 +84,7 @@ SoulSync bridges streaming services to your music library with automated discove
 - Hi-Res FLAC downsampling to 16-bit/44.1kHz CD quality
 - Blasphemy Mode — delete original FLAC after conversion
 - Synchronized lyrics (LRC) via LRClib
+- ReplayGain analysis — optional track-level loudness tagging via ffmpeg, runs before lossy copy so both files get tagged
 - Picard-style album consistency — pre-flight MusicBrainz release lookup ensures all tracks get the same release ID
 
 ### Listening Stats & Scrobbling
@@ -117,8 +118,13 @@ SoulSync bridges streaming services to your music library with automated discove
 - Spotify auth still enables playlists, followed artists, and enrichment
 - MusicBrainz enrichment with Picard-style album consistency
 
+**Hydrabase** (optional P2P metadata network) — replaces iTunes as the metadata source when connected. Federated lookup with community-matched results, falls back automatically if disconnected. Dev-mode feature, enable in Settings → Connections.
+
+**Genre Whitelist** — filter junk genre tags (artist names, radio show names, playlist names) from all 10 enrichment sources. 272 curated default genres, fully customizable. Off by default for backward compatibility.
+
 **Post-Processing Tag Embedding**
 - Granular per-service tag toggles (18+ MusicBrainz tags, Spotify/iTunes/Deezer IDs, AudioDB mood/style, Tidal/Qobuz ISRCs, Last.fm tags, Genius URLs)
+- Multi-artist tagging options: configurable separator (comma/semicolon/slash), multi-value ARTISTS tag for Navidrome/Jellyfin multi-artist linking, optional "move featured artists to title" mode
 - Album art embedding, cover.jpg download
 - Spotify rate limit protection across all API calls
 
@@ -134,12 +140,13 @@ SoulSync bridges streaming services to your music library with automated discove
 ### Automation
 
 **Automation Engine** — Visual drag-and-drop builder for custom workflows
-- **Triggers**: Schedule, Daily/Weekly Time, Track Downloaded, Batch Complete, Playlist Changed, Discovery Complete, Signal Received, and 10+ more
-- **Actions**: Process Wishlist, Scan Watchlist, Refresh Mirrored, Discover Playlist, Sync Playlist, Scan Library, Database Update, Quality Scan, Full Cleanup, and more
-- **Then Actions**: Fire Signal (chain automations), Discord, Telegram, Pushbullet notifications
-- **Playlist Pipeline**: Single automation for full playlist lifecycle — refresh → discover → sync → download missing. No signal wiring needed.
-- **Pipelines**: Pre-built one-click pipeline deployments (New Music, Nightly Operations, etc.)
-- **Signal Chains**: playlist_id forwarded from events to action handlers for proper chain execution
+- **Triggers**: Schedule, Daily/Weekly Time, Track Downloaded, Batch Complete, Playlist Changed, Discovery Complete, Signal Received, Library Scan Complete, Watchlist Match, Wishlist Item Added, and more
+- **Actions**: Process Wishlist, Scan Watchlist, Refresh Mirrored, Discover Playlist, Sync Playlist, Scan Library, Database Update, Quality Scan, Full Cleanup, and 10+ more
+- **Then Actions** (up to 3 per automation): Fire Signal (chain to other automations), Discord/Telegram/Pushbullet notifications, audible chimes
+- **Signal Chains** — One automation fires `signal:foo`, another listens for it. Cycle detection + chain depth limit + cooldown prevent runaway chains.
+- **Playlist Pipeline** — Single automation for full playlist lifecycle: refresh → discover → sync → download missing. No manual signal wiring.
+- **Pipelines** — Pre-built one-click deployments (New Music, Nightly Operations, Full Library Maintenance, etc.) that install a linked group of automations at once
+- **Automation Groups** — Drag-and-drop organization, bulk enable/disable, rename, right-click context menus
 
 **Watchlist** — Monitor unlimited artists with per-artist configuration
 - Release type filters: Albums, EPs, Singles
@@ -149,8 +156,11 @@ SoulSync bridges streaming services to your music library with automated discove
 **Wishlist** — Failed downloads automatically queued for retry with auto-processing
 
 **Mirrored Playlists** — Mirror from Spotify, Tidal, YouTube, Deezer and keep synced
-- Automatic refresh detects changes, discovery pipeline matches metadata
-- Followed Spotify playlists with 403 errors fall back to public embed scraper
+- Auto-refresh detects source changes via URL/ID tracking in playlist metadata
+- Discovery pipeline matches source tracks to user's primary metadata source (Spotify/iTunes/Deezer/Discogs)
+- Auto Wing It fallback — tracks that fail all metadata APIs get stub metadata from the raw source title and flow through the normal download pipeline anyway
+- Followed Spotify playlists that hit 403 errors fall back to public embed scraper
+- Unmatch button on found tracks with DB persistence for mirrored playlists
 
 **Local Profiles** — Multiple configuration profiles with isolated settings, watchlists, and playlists
 
@@ -176,6 +186,8 @@ SoulSync bridges streaming services to your music library with automated discove
 
 **Database Storage Visualization** — Donut chart showing per-table storage breakdown
 
+**Live Log Viewer** — Real-time terminal-style log viewer on Settings → Logs. Color-coded levels (DEBUG/INFO/WARNING/ERROR), live filter + search, switch between log files (app, post-processing, AcoustID, source reuse). Auto-scroll, copy, clear. Updates via WebSocket every 0.5s.
+
 **Import System** — Tag-first matching, auto-grouped album cards, staging folder workflow
 - Auto-Import worker: recursive scan, single file support, AcoustID fingerprinting fallback
 - Confidence-gated: 90%+ auto-imports, 70-90% queued for review