fix: feed refresh spinner leak + lyrics glow offset on complex scripts

[ajisth69]

Three commits — two feature fixes, one repair found by CI on this PR.

1. Feed: pull-to-refresh spinner spins forever over loaded content — 68665aa

FeedViewModel.fetchFeed has two exit paths that never cleared isRefreshing:

• the ensureActive() after loadFeed — fires when a newer session/YT-auth emission cancels the job mid-load, and
• the changed-identity guard's return@launch — fires when the connection or username changed while the load was in flight.

Both left isRefreshing = true, so PullToRefreshBox kept its indicator spinning over fully-loaded content, indefinitely.

Fix: a finally clears the flag on every exit, guarded by feedJob === self so a newer feed job that owns the state is never reset underneath.

Note — the other half of the report ("home page takes ages to load") was the discovery-gating bug fixed in #315. This PR fixes the spinner half on top of it.

2. Lyrics: glow offset behind non-Latin lines — af70b97

The active line's glow was a TextStyle.shadow (50 % white, 22 px). The platform positions that shadow through its per-glyph shadow pass, which lands the halo off the shaped glyph positions for complex-script shaping — Gurmukhi reads as a second, offset image behind the text, while Devanagari and Latin look fine.

Fix: LyricGlowText draws the glow as a blurred copy of the very Text rendered on top of it — same text, style, layout direction, width — so the halo's bounds are identical to the glyph run for every script by construction. Wired behind the active line in both the word-sync and line-sync branches. Below API 31 (Modifier.blur is a no-op) the original shadow stays as the fallback.

Tests: LyricsRtlTest gains Indic-script cases (Gurmukhi, Devanagari, Tamil must stay LTR), so a future "non-Latin means RTL" mistake can't silently mirror a line.

3. 844a187 — repairs two compile breaks, and main itself

CI on this PR surfaced something bigger than my own bugs:

• main currently does not compile. The fix: feed first-paint latency, MMAP 44.1 fallback, canvas/static cover handover #315 merge landed the feed commit ea6a5e8 without its fixup a732c68, so the add(it to ...) typo inside the forEachIndexed lambdas is live on main — every build from main right now fails at FeedRepository.kt. Restored here (add(t to ...) in the indexed blocks; the unnamed forEach blocks below keep add(it to seedScore(...))).
• Modifier.blur has no clip parameter in this Compose version; the glow now uses edgeTreatment = BlurredEdgeTreatment.Unbounded.

If a build of yours failed mysteriously today, this was it.

Status

CI green on 844a187 (unit tests + release build). Device pass still worth doing: pull-to-refresh the feed mid-load and confirm the indicator always clears; play a Punjabi track and confirm the glow tracks the glyphs.

Not addressed here: "every other page takes ages to load" — the Home/Discover/Playlist/NewReleases loading paths all reset their flags correctly in code, so that half needs a logcat pass on the specific page rather than a guess.