chore(release): bump version to 1.2.5 "Accolade Watch"

* src-tauri/Cargo.toml and Cargo.lock: 1.2.4 -> 1.2.5
  * src-tauri/tauri.conf.json: 1.2.4 -> 1.2.5
  * package.json (+ package-lock.json regenerated): 1.2.4 -> 1.2.5
  * snapcraft.yaml: 1.2.4 -> 1.2.5
  * packaging/flatpak/com.blitzfc.qbz.metainfo.xml: new <release> entry
    dated 2026-04-15 covering the visual refresh (new logo + login
    branding), Plasma/Klassy auto-detect for window controls,
    opt-in match-system-chrome rounded corners, Editor's Picks
    ribbon cleanup, the two sidebar menu positioning fixes shipped
    alongside this bump, and the DAC wizard contrast fix.

Tag not applied per request — release notes are staged, ready for
the screenshots pass and manual tag afterward.

cc

package.json

@@ -1,6 +1,6 @@
 {
   "name": "qbz-nix",
-  "version": "1.2.4",
+  "version": "1.2.5",
   "description": "Native high-fidelity client for Qobuz™ subscribers on Linux with Hi-Fi audio support (uses the Qobuz API; not certified by Qobuz)",
   "type": "module",
   "scripts": {