Block B — enrichment lifecycle drift:
* SubscriptionFeedViewModel tracks enrichJob, cancelled in refresh
+ clearInMemoryCache so spam-refresh and cache-toggle no longer
leave a globalScope coroutine writing to a destroyed _ui
* Enrich now runs on viewModelScope, channels snapshotted at job
start so the terminal merge doesn't read a stale subs list
* mergeFromCache moved off Main on both the refresh path AND the
init-hydration path — 750-item flatMap+sort+regex no longer
blocks the UI thread
* VideoDetailViewModel dual loadedUrl bookkeeping collapsed to
the UiState field only; the rejected-URL path also stamps
loadedUrl so the gate reads coherently
Block A — auto-update authenticity:
* AppUpdateClient pins the fdroid.sulkta.com leaf SPKI + the
Let's Encrypt E7 intermediate via OkHttp CertificatePinner
* file.name accepted only when matching ^/[A-Za-z0-9._-]+\.apk$
* versionCode clamped to (0, 10_000_000] before we trust the
'update available' notification — a hostile index can no longer
pin us to MAX_VALUE
Block C — captureResumePosition perf:
* ResumePositionsStore.record short-circuits when the existing
entry matches position+duration so the 5s poll's
before !== next guard actually skips the SP write
* JSON encode + SP write off Main via globalScope IO
Block D — Rust feed.rs hardening:
* Shared reqwest Client via OnceLock — 50 channels no longer
pay 50 TLS handshakes
* Response body capped at 2 MiB via bytes_stream — adversarial
feeds can't OOM the JVM
* parse_rss returns partial results on quick-xml errors instead
of nuking everything already parsed
* extract_channel_id widened (m./www./http(s)?/trailing path)
and validates exact 24-char UC<22 base64-ish>
* Skip entries with empty title/published
* iso_to_relative future dates → 'just now' (clock skew
no longer pins items to top)
* civil_to_days year clamp 1970..=2200 before the i64 arithmetic
* Redirect chain capped at 3
* Dropped the broken lexicographic sort on upload_date_relative
* Cap parsed entries at 50 per channel
MED batch:
* ThumbnailProgressOverlay uses derivedStateOf so only rows
whose specific entry changed recompose on the 5s positions tick
* EnrichmentStore.put short-circuits on identical view+duration
so re-enrich within TTL doesn't write SP
* EnrichmentStore.load prunes TTL-expired entries on hydration
* FeedRefreshWorker distinguishes transient (Result.retry) from
parse (Result.success) failures
* WorkManager interval coerceAtLeast(15L) on both schedulers
Kayos
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