Rebrand as Playlink with a new sunset theme

- Name: Playlink in the UI, page title, footer, messages and README
  (file names like playlink.db and .playlink-trash are unchanged).
- Theme: plum-black surfaces with a coral-to-pink accent, a soft glow
  behind the page, gradient primary buttons, toggles and progress bars,
  accent focus rings and slim scrollbars.
- New logo (beamed notes on the brand gradient) and a Play/link wordmark.
- Inter variable font, bundled so it works under the strict CSP.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -1,6 +1,6 @@
-# playlink
+# Playlink
 
-Deduplicate music libraries with hardlinks. playlink finds songs that exist in both a **master** library (e.g. your full `Albums`) and a
+Deduplicate music libraries with hardlinks. Playlink finds songs that exist in both a **master** library (e.g. your full `Albums`) and a
 **slave** library (e.g. a curated `Singles` library) and replaces the slave copy with a hardlink to the master copy. Each song then takes
 up disk space only once, while both libraries keep looking exactly the same to Plex, Navidrome, Jellyfin and other media servers.
 
@@ -13,7 +13,7 @@ Files are matched by their **path relative to each library root**. Any folder la
 `Genre/Artist/Title.ext`, flat, …) as long as both libraries use the same one, so that a song sits at the same relative
 path on both sides. The fallbacks below catch small differences, and a scan warns when the two layouts don't line up.
 
-| Situation | What playlink does |
+| Situation | What Playlink does |
 |---|---|
 | Same relative path, **byte-identical** | Status `identical`. Link with one click, in bulk, or automatically after each scan. |
 | Same path, **different bytes** (re-encode, different tags) | Status `different`. Manual review with a codec/bitrate/bit-depth/duration comparison. |
@@ -51,7 +51,7 @@ Safeguards:
 codec-weighted bitrate (Opus and AAC count for more per kbps than MP3). You then have three choices:
 
 - **Upgrade / link to master copy.** The default. When the master copy is better, the match is flagged as an **upgrade** and listed
-  under the *Upgrades* filter. The master is kept because it belongs to a complete album. If the master is *lower* quality, playlink
+  under the *Upgrades* filter. The master is kept because it belongs to a complete album. If the master is *lower* quality, Playlink
   warns you and asks for explicit confirmation.
 - **Use slave copy as master.** The override. The slave's better file replaces the master file, the old master file is quarantined, and both
   libraries share the better file.
@@ -76,14 +76,14 @@ Each row has the match status and type, a recommendation, both paths, where link
 bit depth and duration for both sides, the quality verdict and any notes. The file opens cleanly in Excel, Numbers and LibreOffice
 (UTF-8, and cells a spreadsheet would treat as formulas are escaped).
 
-**Folders without music** (the *Cleanup* tab). Choose the slave or master library and **Find folders**: playlink lists the top-most
+**Folders without music** (the *Cleanup* tab). Choose the slave or master library and **Find folders**: Playlink lists the top-most
 folders with no music file anywhere inside them (music = the pair's file extensions), such as album folders left empty after linking or
 ones holding only a cover or playlist, with what they still contain. Empty folders are pre-selected, folders that still hold files are
 not. **Remove** asks for confirmation (and an extra acknowledgement when the folders still hold files), re-checks each folder for music
 right before touching it, and moves it into the quarantine instead of deleting it: it can be restored from History until the retention
 period purges it. The library root, the quarantine and hidden folders are never listed, and dry run applies.
 
-**Backups** (Settings → Backups), similar to Sonarr. A backup is a zip of playlink's database (settings, library pairs, scan results and
+**Backups** (Settings → Backups), similar to Sonarr. A backup is a zip of Playlink's database (settings, library pairs, scan results and
 history, not music files) taken safely while the app runs. Choose a folder (default `/config/backups`), a schedule (off, every 1, 3, 7
 or 14 days) and a retention period for scheduled backups; **Back up now** makes a manual one (kept until deleted). Backups can be
 downloaded, deleted, or restored, also from an uploaded zip. A restore is validated first (damaged backups and ones from a newer version
@@ -92,12 +92,12 @@ policy brings it back automatically. Optionally, **back up before every action i
 before scans change files), never one per file; if that backup fails the action does not run, and the newest 10 are kept.
 
 **Build mode** covers the "start fresh" workflow. Point the slave at an empty folder, browse the master library, tick the
-folders or songs you want, and playlink hardlinks them in at the same relative path. **Remove** deletes slave files, but only ones that are hardlinks of the
+folders or songs you want, and Playlink hardlinks them in at the same relative path. **Remove** deletes slave files, but only ones that are hardlinks of the
 master file.
 
 ## Safety model
 
-playlink is built so that no user data is ever lost, even if it crashes or loses power mid-operation:
+Playlink is built so that no user data is ever lost, even if it crashes or loses power mid-operation:
 
 - **Dry run is on by default.** Every action is recorded in Activity as *planned* until you switch to live mode.
 - **Files are re-verified before any change.** Both files must still be plain regular files with the same inode, size and mtime that
@@ -159,7 +159,7 @@ Run a scan, check the Review tab, and turn off dry run once the planned actions
 
 - **Both libraries must be visible through one bind mount.** Docker bind mounts are separate mount points, and `link(2)` fails across
   them (`EXDEV`) even when they are on the same disk. Mount a common parent folder, as shown above.
-- **Both libraries must be on the same filesystem.** playlink checks this when you save a pair and before every operation.
+- **Both libraries must be on the same filesystem.** Playlink checks this when you save a pair and before every operation.
 - **Unraid:** hardlinks through `/mnt/user` require *Settings → Global Share Settings → Tunable (support Hard Links)* to be *Yes*
   (the default). If the share uses a cache pool, make sure your mover preserves hardlinks. Every link is verified by inode, and a
   failed link aborts safely with the original untouched.
@@ -176,7 +176,7 @@ Run a scan, check the Review tab, and turn off dry run once the planned actions
 | `PLAYLINK_LOG_LEVEL` | `info` | `debug` for verbose logs. |
 
 **Hide quarantine from Plex** (Settings → Media servers) writes a `.plexignore` into each pair's quarantine folder so Plex does not
-pick up quarantined songs; new quarantine folders get it automatically. Turning it off removes the file again, but only if playlink
+pick up quarantined songs; new quarantine folders get it automatically. Turning it off removes the file again, but only if Playlink
 created it.
 
 Per-pair settings (in the UI) are file extensions, auto-link, approximate matching and its threshold, scan interval, quarantine folder,