feat(lyrics): Add Share Lyrics (select lines, styled card, share/save as image)

[X-MAN-TG]

Adds a "Share Lyrics" feature to the lyrics view, similar to the Spotify and YouTube Music lyrics sharing.

A. How it works

• A new share button in the lyrics controls opens a full-screen flow.
• Step 1: select 1 to 5 contiguous lines. The default is the current line plus the line before and after.
• Step 2: preview the card with a Song / Lyrics toggle and a color picker, including a dimmed album-cover background.
• The card is rendered to a PNG (album art, title, artist, lyrics, LastWave logo and name), then shared through the Android share sheet or saved to Pictures/LastWave.
• Lyrics wrap like the original lines, and RTL and complex scripts (Devanagari, Arabic, CJK) are supported.
• The card uses the app's existing font, artwork pipeline and theme.

B. Scope

• New code lives in ui/player/lyricsshare/, plus a new tintable logo drawable.
• Existing files are only touched in small, additive ways: ModernLyricsView.kt (share button), PlayerHost.kt (one param), FileExportHelper.kt (new share/save functions), strings.xml (all locales), CHANGELOG.md.
• No changes to lyrics providers, playback, database or navigation.

C. Testing

• Unit and renderer tests added for selection rules, color contrast, card layout, scripts, cache cleanup and share intents.
• testDebugUnitTest, lintDebug, assembleDebug and assembleRelease pass.
• Manually tested on a physical device: select, preview, share and save. No crashes found.

D.






Notes

• Rebased on the latest main.
• Screenshots of the select screen and the generated cards are attached below.