feat(kb): ask survives view switch + search query expansion (server-side)

Two recurring frustrations from the v0.1.8 demo:

1. Searching "מהי תקנה 37" only returned the תקנה 37 חוזר and the law —
   ספר הליקויים, the canonical medical reference, was crowded out by the
   document whose title literally contained the query terms. Fixed in
   shira-hermes 1441a41 by adding an LLM-driven query-expansion path to
   /kb/search (default expand=true). Same query now also returns 2 hits
   from src 29 (ספר הליקויים).
2. Asking Shira a question and clicking another EspoCRM view dropped the
   in-flight request — coming back rendered a blank kb-results pane, even
   though the request had completed in the background. Fixed here:
   {question, promise, startedAt} are now stored at module scope (closure
   shared across remounts of this view). afterRender re-binds handlers
   for any active ask, resumes the progress panel with the original start
   time so the elapsed counter doesn't reset, and replays the most recent
   completed answer from sessionStorage so the user sees their result
   even after a hard reload. State is intentionally session-scoped — no
   answers persist across browser sessions.

Refs Task Master #3, #4

manifest.json

@@ -1,14 +1,14 @@
 {
     "name": "KnowledgeBase",
     "module": "KnowledgeBase",
-    "version": "0.1.8",
+    "version": "0.1.9",
     "acceptableVersions": [
         ">=8.0.0"
     ],
     "php": [
         ">=8.1"
     ],
-    "releaseDate": "2026-04-24",
+    "releaseDate": "2026-04-25",
     "author": "klear",
     "description": "Knowledge Base — Israeli National Insurance law, regulations, and circulars. Hybrid search + ask-shira, powered by shira-hermes KB."
 }