[A-EDev]

Summary

Part 10 of 22 of the music player plan (Android parity). Stacked on feat/music-player-wide (PR #186); review and merge in order.

• Immersive Artwork: the cover full-bleed at the top, or on the start side of a wide player, fading into its blurred continuation, as on Android. The backdrop now loads the cover through the same proxied copy as the artwork.
• Watch video in the song menu finds the official video with Android's MusicVideoMatching rules and opens it in the video player at the same moment.

Related issue

Change type

• Bug fix
• Feature
• Refactor or maintenance
• Documentation
• Build, packaging, or CI

Validation

• pnpm test: 533 tests passed, 0 failed
• pnpm build: passed
• cargo fmt --manifest-path src-tauri/Cargo.toml --all -- --check: not run on this branch (no Rust changes); clean at the top of the stack
• cargo clippy --manifest-path src-tauri/Cargo.toml --all-targets --all-features: not run on this branch (no Rust changes); no new warnings at the top of the stack
• cargo test --manifest-path src-tauri/Cargo.toml --all-targets --all-features: not run on this branch (no Rust changes); 825 passed, 0 failed at the top of the stack
• I smoke-tested the affected desktop behavior. macOS: Immersive on the wide player (screenshot); 8 of 8 trending songs matched an official video; the video opened at 8 s with the song paused at 7 s.
• OS/device: device testing by the owner. The checks above ran on macOS 27 (Apple Silicon MacBook Pro, 120 Hz) in a dev build of the whole stack; Windows and Linux were not run.

Screenshots or recordings

Risk and compatibility

• No new secrets, private data, telemetry, or broad Tauri permissions were introduced.
• User-facing documentation was updated where needed (changelog entry in v0.1.0-beta3.txt).
• Dependency and lockfile changes are intentional and limited to this PR. No dependency changes.
• Breaking changes and upgrade steps are clearly documented. No breaking changes.

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