Add a music player for the lock screen.

Problem Description

While standard Android notification/lock screen media controls allow for basic playback manipulation, they do not support advanced features like viewing lyrics. To read lyrics, users must fully unlock their devices. This introduces a security risk in public spaces (like buses or trains), where an unlocked phone is highly vulnerable to theft or snatching. Providing a way to engage deeply with the music directly from a locked state would greatly improve both user security and convenience.

Proposed Solution

Implement a dedicated, optional full-screen lock screen UI for SimpMusic (similar to classic music players or custom lock screen overlays). This view should display large album art, playback controls, and dynamically syncing lyrics—all accessible without requiring the user to unlock the device.

Alternative Solutions

If a full lock screen overlay is not feasible due to Android OS limitations, try instead:

• Dynamic Media Notification: Enhance the existing media notification to optionally cycle or display the current lyric line within the expanded notification view.
• Picture-in-Picture (PiP) Lyrics: Implement a PiP window mode specifically for lyrics, allowing users to view them while using other apps or overlaying it securely where applicable.

Additional Context

No response

Start by investigating Android lock-screen media controls and the feasibility of full-screen overlays, dynamic notifications, and Picture-in-Picture lyrics. Compare the proposed alternatives against Android security restrictions and existing SimpMusic playback behavior. Done would mean a defined, optional locked-state lyrics experience with album art and playback controls, or a documented implementation boundary.