feat: searcher Phase 2 classifies apply type; applier sorts by priority; already-applied detection

lib/queue.mjs

@@ -72,6 +72,11 @@ export function appendLog(entry) {
   saveLog(log);
 }
 
+export function isAlreadyApplied(jobId) {
+  const log = loadLog();
+  return log.some(e => e.id === jobId && e.status === 'applied');
+}
+
 export function getJobsByStatus(status) {
   const queue = loadQueue();
   if (Array.isArray(status)) return queue.filter(j => status.includes(j.status));