feat(ask): progress panel + 240s ajax timeout

The ask mode goes through the full agent loop (hybrid search + rerank +
Claude). Typical runs land at 30-90s; long queries reach 90-120s. With
the previous UX the user saw only "Loading…" on the submit button and
"מחפש…" in the results area — indistinguishable from a stuck request.

- Render a dedicated progress panel on ask with a spinner, a description
  of what shira is doing, and a live elapsed-seconds counter.
- After 2 minutes, append a "taking longer than usual" warning so users
  know the request is still running.
- Override Espo.Ajax timeout to 240s; jQuery's default (undefined) or
  EspoCRM's request-level default would kill the browser request well
  before shira finishes on a cold cache.
- Version 0.1.7.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

manifest.json

@@ -1,7 +1,7 @@
 {
     "name": "KnowledgeBase",
     "module": "KnowledgeBase",
-    "version": "0.1.6",
+    "version": "0.1.7",
     "acceptableVersions": [
         ">=8.0.0"
     ],