Per-track lookback and per-track profiles

Searcher: each track independently tracks when it was last searched
via data/track_history.json. New tracks get full lookback (90d),
existing tracks look back since their last completion. Keyword-level
crash resume preserved.

Profiles: search tracks can specify profile_overrides (inline) or
profile_path (external file) to customize resume, cover letter, and
experience per track. Filter and applier both use the track-specific
profile. Base profile.json provides shared info (name, contact, etc).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lib/search_progress.mjs

@@ -7,12 +7,13 @@ import { readFileSync, writeFileSync, existsSync, unlinkSync } from 'fs';
 let progressPath = null;
 let progress = null;
 
-export function initProgress(dataDir, lookbackDays) {
+export function initProgress(dataDir, maxLookbackDays) {
   progressPath = `${dataDir}/search_progress.json`;
 
   if (existsSync(progressPath)) {
     const saved = JSON.parse(readFileSync(progressPath, 'utf8'));
-    if (saved.lookback_days === lookbackDays) {
+    // Resume if an in-progress run exists (has uncompleted tracks)
+    if (saved.started_at && !saved.finished) {
       progress = saved;
       const done = progress.completed?.length ?? 0;
       if (done > 0) {
@@ -20,19 +21,27 @@ export function initProgress(dataDir, lookbackDays) {
       }
       return progress;
     }
-    console.log(`🆕 New lookback window (${lookbackDays}d), starting fresh\n`);
   }
 
   progress = {
-    lookback_days: lookbackDays,
+    lookback_days: maxLookbackDays,
+    track_lookback: {},  // per-track lookback days, saved on init for crash resume
     started_at: Date.now(),
     completed: [],
-    keyword_progress: {},  // key: "platform:track" → last completed keyword index (0-based)
+    keyword_progress: {},
   };
   save();
   return progress;
 }
 
+/** Save per-track lookback so crash resume uses the right value */
+export function saveTrackLookback(trackName, days) {
+  if (!progress) return;
+  if (!progress.track_lookback) progress.track_lookback = {};
+  progress.track_lookback[trackName] = days;
+  save();
+}
+
 /** Save generated keywords for a track — reused on resume, never regenerated mid-run */
 export function saveKeywords(platform, track, keywords) {
   if (!progress) return;