Episode scripts: file by season + episode so numbers can repeat per book; search labels for current series; v2.9.6

- Scripts keyed "<season>-<episode>" (legacy ones migrate on first start; unseasoned ones keep their plain key)
- Season backfill handles episode numbers shared across seasons (title match fallback)
- Fix: "Backfill seasons from RSS" was swallowed by the upload route
- Global search labels script results with the title of the series playing now (both lanes), not just finished books

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

server/episode-script-keys.js

@@ -0,0 +1,33 @@
+// Episode scripts are filed by season + episode number ("2-1"), because each book of the Bible
+// is its own podcast season and episode numbers can restart in every season. A script with no
+// season keeps its plain episode number as its key.
+
+export function scriptKey(season, episodeNumber) {
+  const ep = String(episodeNumber ?? '').trim()
+  const s = String(season ?? '').trim()
+  return /^\d+$/.test(s) ? `${s}-${ep}` : ep
+}
+
+// The episode number a stored script belongs to (new entries record it; legacy ones are keyed by it).
+export function scriptEpisodeNumber(key, entry) {
+  if (entry && typeof entry.episodeNumber === 'string' && entry.episodeNumber) return entry.episodeNumber
+  const parts = String(key).split('-')
+  return parts[parts.length - 1]
+}
+
+// One-time move of legacy scripts ({ "7": { season: "1" } }) to season-episode keys ({ "1-7": ... }).
+// Scripts without a season stay under their plain episode number. Never overwrites an existing key.
+export function migrateScriptKeys(scripts) {
+  const next = {}
+  let changed = false
+  for (const [key, entry] of Object.entries(scripts ?? {})) {
+    if (!entry || typeof entry !== 'object') continue
+    const episodeNumber = scriptEpisodeNumber(key, entry)
+    const wanted = scriptKey(entry.season, episodeNumber)
+    const targetKey = wanted !== key && !(wanted in scripts) && !(wanted in next) ? wanted : key
+    const withEpisode = entry.episodeNumber === episodeNumber ? entry : { ...entry, episodeNumber }
+    if (targetKey !== key || withEpisode !== entry) changed = true
+    next[targetKey] = withEpisode
+  }
+  return { scripts: next, changed }
+}