Fix H5/H6/M21/L37-40/L47/L55/L68/L72/L76/L91/L98/L108/L165/L166 audit items

H5: HistoryEntry now stores formatId+formatHasAudio; redownload passes them
    back to addFromUrl so the original yt-dlp format is reused, not guessed.
    Compound quality labels stripped to the preset prefix for old history.
L72: thumbnail now passed in redownload so re-queued rows keep their art.
H6: TerminalView log capped at MAX_LOG_LINES=2000 to prevent unbounded growth.
M21: --audio-quality omitted for lossless audioFormats (flac/wav).
L166: fmtEta hour rollover fixed in all 3 locations -- 2h00:00 not 120:00.
L165: queueStats formatSpeed precision aligned with fmtBytes.
L55: QueueItem suppresses sizeLabel when already in probed-format quality label.
L47: probeMeta null sends empty meta event so Resolving clears via SR6.
L68: notifiedBackground resets on window show for subsequent close-while-downloading.
L76: dup warning falls back to URL when title is still a placeholder.
L91: SettingsView onFormatSelect uses indexOf instead of unsafe tuple cast.
L98: Embed chapters field gets a hint text.
L108: BrowserWindow created with explicit title AeroFetch.
L37: pure formatters extracted to src/main/lib/formatters.ts and unit-tested.
L38: buildArgs test covers webm thumbnail suppression.
L39: CROP_SQUARE_PPA test is structural not exact-string.
L40: looksLikeUrl/looksLikeSingleVideo extracted to src/renderer/src/lib/urlHelpers.ts.

typecheck + 242 tests + eslint + prettier green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/renderer/src/useClipboardLink.ts

@@ -1,43 +1,10 @@
 import { useCallback, useEffect, useRef, useState } from 'react'
 import { useSettings } from './store/settings'
-
-/** A quick heuristic for "this clipboard text is a link worth offering". */
-export function looksLikeUrl(text: string): boolean {
-  const t = text.trim()
-  if (!/^https?:\/\//i.test(t)) return false
-  try {
-    new URL(t)
-    return true
-  } catch {
-    return false
-  }
-}
-
-/**
- * True for URLs that point at a single video rather than a channel/playlist. The
- * library's add-source field wants collections to sync, not one-off videos, so it
- * filters these out of its suggestions. Conservative on purpose: it only flags the
- * common YouTube single-video shapes (a `/watch?v=` or `youtu.be/<id>` with no
- * `list=` context), so a channel/playlist link — on YouTube or any other site — is
- * never wrongly rejected. A `list=` param means "add the playlist", so it's kept.
- */
-export function looksLikeSingleVideo(text: string): boolean {
-  let u: URL
-  try {
-    u = new URL(text.trim())
-  } catch {
-    return false
-  }
-  if (u.searchParams.has('list')) return false
-  const host = u.hostname.replace(/^www\./, '').toLowerCase()
-  if (host === 'youtube.com' || host === 'm.youtube.com' || host === 'music.youtube.com') {
-    return u.pathname === '/watch' && u.searchParams.has('v')
-  }
-  if (host === 'youtu.be') {
-    return /^\/[\w-]{6,}$/.test(u.pathname)
-  }
-  return false
-}
+// Pure URL helpers extracted to a standalone module so they can be tested
+// without pulling in the Zustand store (L40). Re-exported here for existing
+// consumers (DownloadBar, LibraryView) without an import-path change.
+export { looksLikeUrl, looksLikeSingleVideo } from './lib/urlHelpers'
+import { looksLikeUrl } from './lib/urlHelpers'
 
 /** Where an offered link came from — drives the banner's wording. */
 export type SuggestionSource = 'clipboard' | 'external'