fix step-behind titles: UIAutomation element label from click watcher + smarter search fallback

**Root cause**
When OCR fails, the title fell back to the browser window title.  For a
click on a search-results page, the window title reflects the *previous*
search query ("oracle - Google Search"), producing "Search for Oracle"
even though the user is clicking a link *on* that page.

**Fix 1: UIAutomation element label from the click watcher**
The C# click-watcher hook now enriches each click in a background thread
(ClickProcessorLoop) rather than in the hook callback:
- MouseHookCallback captures window title synchronously (fast Win32),
  then queues a PendingClick and returns immediately.
- ClickProcessorLoop calls AutomationElement.FromPoint() via reflection
  (no compile-time assembly reference → no startup failure if UIA is
  absent).  Wrapped in a 300ms timeout thread so slow UIA calls don't
  delay the click event past the frame buffer window.
- Emits CTX + ELEM (label/role/value) + CLICK as an atomic batch.

Node.js:
- Parses ELEM events, merges element info into _pendingWindowContext.
- clickMeta.windowContext now carries elementLabel/elementRole/elementValue
  in addition to windowTitle/appName.
- buildCaptureTitle priority-5 (element label) now fires from click-watcher
  data, giving "Select Oracle | Cloud Applications…" without OCR.

**Fix 2: Wider OCR crop**
ocrAroundClick now uses a full-display-width × 100px horizontal strip at
the click height.  The previous 420 px crop cropped through long link text
(e.g. "Oracle | Cloud Applications and Cloud Platform"), causing fragments
to be scored lower than the complete text.

**Fix 3: Search-results window title fallback**
extractSearchQuery now only produces "Search for Oracle" when recentTyped
is non-empty (the user was actually typing a query).  For a pure click on
the search-results page (no recent typing), the fallback is "Select a
Oracle result in Chrome" — honest about what we know without implying the
user performed the search in this step.

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

app/text-intel.js

@@ -151,7 +151,14 @@ class TextIntelService {
 
   async ocrAroundClick(frame, clickPos) {
     if (!frame || !frame.image) return { text: '', confidence: null };
-    const rect = this.cropRectForPoint(frame, clickPos);
+    // Use a full-width horizontal strip at the click height. This preserves complete
+    // link text (e.g. "Oracle | Cloud Applications and Cloud Platform") rather than
+    // cropping through it when the element spans more than the 420 px default width.
+    const bounds = frame.display?.bounds || { x: 0, y: 0, width: frame.size.width, height: frame.size.height };
+    const rect = this.cropRectForPoint(frame, clickPos, {
+      width: bounds.width,  // full display width → full image width after DPI scaling
+      height: 100,          // ~2 lines tall, enough context without too much noise
+    });
     try {
       return await this.recognizeCrop(frame.image, rect);
     } catch {