vc=25: audit-fix sprint — CRIT + HIGH + MED + LOW cleanup

Opus max-effort audit of the vc=23 post-MediaController-unification
codebase surfaced two CRITs, both in my own recent code.

CRIT-1 + 1b: inline-position-threading band-aid deleted. After the V-2
controller unification, seeking the live controller to its own
currentPosition was always 0-500ms backwards — every inline-to-
fullscreen and minibar-expand handoff jerked playback backward. The
whole `inlinePositionMs` / `onPositionChanged` / `startPositionMs` /
`seekTo` chain is gone. The controller is one player; no handoff
needed.

CRIT-2: PlayerLeaveHandler removed. The registry was fully orphaned —
nothing ever assigned to handler. Media3 handles HOME-to-background
natively via the foreground service. Dropped the file, the
onUserLeaveHint override, and the import.

HIGH-1 + 5: PlayerViewModel collapsed into VideoDetailViewModel. Both
fetched the same streamInfo for the same URL; PlayerScreen used to
spin up two VMs to lift uploader + thumbnail from one and stream URLs
from the other. One VM now exposes both `detail` and `resolved`. Drops
a redundant network fetch and the double-spinner UX on PlayerScreen.

HIGH-2: AndroidView { PlayerView } in PlayerScreen + InlinePlayer now
has onRelease { it.player = null } so PlayerView surfaces stop
retaining the controller after the composable leaves composition.

HIGH-3: SubscriptionFeedViewModel switched to a per-channel cache.
Each channel's entries refresh on their own TTL — adding one new
subscription no longer invalidates the other 49. Failed/timed-out
channel fetches leave the prior cache entry intact instead of
blanking the feed for that channel.

HIGH-4: onNewIntent override added. singleTask was silently dropping
shared-from-Chrome YT URLs whenever Straw was already running. New
intents now feed pendingDeepLink which the Compose tree drains into
Screen.VideoDetail.

MED-3, MED-8, MED-10, LOW batch: PlayerView control-overlay overlap
fixed by going through one strategy; SearchViewModel.recordSearch
moved into the success branch so errored queries don't pollute recent
searches; Downloader's host whitelist tightened to *.googlevideo.com
only; SubscriptionsStore.clear + HistoryStore.clearWatches/Searches
now use updateAndGet for atomic clear consistent with the other
writers; phase/path/audit-ticket markers stripped from comments
(kept the technical commentary, dropped sprint tags); 4x duplicated
Color(0xCC222222) overlay color extracted to OverlayChromeColor named
constant in StrawTheme; HtmlText + StrawActivity NewPipeExtractor
references replaced with the current extractor.

Net: ~80 LOC deleted overall (the position-threading + handler
registry + duplicate VM more than offset the cache + onNewIntent
additions).

buildSrc/src/main/kotlin/ProjectConfig.kt

@@ -55,6 +55,6 @@ const val NEWPIPE_APPLICATION_ID_NEW = "net.newpipe.app"
 // vc=19 / 0.1.0-AE — rust pipeline cutover. Extraction via
 // strawcore-core (Sulkta-Coop/strawcore) via the UniFFI wrapper; no
 // NewPipeExtractor in the runtime path.
-const val STRAW_VERSION_CODE = 24
-const val STRAW_VERSION_NAME = "0.1.0-AJ"
+const val STRAW_VERSION_CODE = 25
+const val STRAW_VERSION_NAME = "0.1.0-AK"
 const val STRAW_APPLICATION_ID = "com.sulkta.straw"