Extend element registry and migrate all tests to semantic selectors

Phase 2 of element registry migration - eliminate hardcoded coordinates:

Element tracker additions:
- wxTreeCtrl items (clickTreeItem, findTreeItem)
- wxDataViewCtrl items and column headers
- wxPropertyGrid rows
- wxListBox items
- wxSpinButton arrows
- wxSlider thumb/track
- wxTextCtrl area
- wxSearchCtrl field
- wxAuiManager pane content areas
- wxCalendarCtrl dates

Test migrations:
- 24 test files updated to use element registry helpers
- Replaced coordinate-based clicks with semantic selectors
- Added find-hardcoded-coords.sh script for auditing

Remaining coordinates are legitimate (scroll positioning, drawing, test.fail blocks).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/find-hardcoded-coords.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+# Find all lines with hardcoded coordinates in test files
+# Excludes waitForTimeout, timeout:, and common non-coordinate numbers
+
+OUTPUT_FILE="hardcoded-coords-report.txt"
+
+echo "=== Hardcoded Coordinates Report ===" > "$OUTPUT_FILE"
+echo "Generated: $(date)" >> "$OUTPUT_FILE"
+echo "" >> "$OUTPUT_FILE"
+
+# Find lines with position/coordinate patterns
+echo "=== Click position patterns ===" >> "$OUTPUT_FILE"
+grep -n "position: { x:" e2e/*.spec.ts >> "$OUTPUT_FILE" 2>/dev/null
+
+echo "" >> "$OUTPUT_FILE"
+echo "=== Mouse click with coordinates ===" >> "$OUTPUT_FILE"
+grep -n "mouse\.click.*[0-9]" e2e/*.spec.ts | grep -v "centerX\|centerY" >> "$OUTPUT_FILE" 2>/dev/null
+
+echo "" >> "$OUTPUT_FILE"
+echo "=== Mouse move with coordinates ===" >> "$OUTPUT_FILE"
+grep -n "mouse\.move.*[0-9]" e2e/*.spec.ts | grep -v "centerX\|centerY" >> "$OUTPUT_FILE" 2>/dev/null
+
+echo "" >> "$OUTPUT_FILE"
+echo "=== Mouse dblclick with coordinates ===" >> "$OUTPUT_FILE"
+grep -n "mouse\.dblclick.*[0-9]" e2e/*.spec.ts >> "$OUTPUT_FILE" 2>/dev/null
+
+echo "" >> "$OUTPUT_FILE"
+echo "=== Canvas click with position ===" >> "$OUTPUT_FILE"
+grep -n "canvas\.click.*position" e2e/*.spec.ts >> "$OUTPUT_FILE" 2>/dev/null
+
+echo "" >> "$OUTPUT_FILE"
+echo "=== getImageData coordinates ===" >> "$OUTPUT_FILE"
+grep -n "getImageData.*[0-9]" e2e/*.spec.ts >> "$OUTPUT_FILE" 2>/dev/null
+
+echo "" >> "$OUTPUT_FILE"
+echo "=== clickCanvas calls ===" >> "$OUTPUT_FILE"
+grep -n "clickCanvas.*[0-9]" e2e/*.spec.ts >> "$OUTPUT_FILE" 2>/dev/null
+
+echo "" >> "$OUTPUT_FILE"
+echo "=== dragCanvas calls ===" >> "$OUTPUT_FILE"
+grep -n "dragCanvas.*[0-9]" e2e/*.spec.ts >> "$OUTPUT_FILE" 2>/dev/null
+
+echo "" >> "$OUTPUT_FILE"
+echo "=== Summary by file ===" >> "$OUTPUT_FILE"
+for file in e2e/*.spec.ts; do
+    count=$(grep -c "position: { x:\|mouse\.click.*box\.\|mouse\.move.*box\.\|canvas\.click.*position\|clickCanvas\|dragCanvas" "$file" 2>/dev/null || echo "0")
+    if [ "$count" -gt 0 ]; then
+        echo "$file: $count potential hardcoded coordinates" >> "$OUTPUT_FILE"
+    fi
+done
+
+echo ""
+echo "Report written to $OUTPUT_FILE"
+cat "$OUTPUT_FILE"