feat: add SVG icons for debug panel

- Add check, x, trash, settings, clock, and loader icons
- Replace emoji with proper SVG icons in DebugPanel
- Improve visual consistency and cross-platform compatibility

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

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

src/assets/icons/check.svg

@@ -0,0 +1,3 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M14.293 4.293a1 1 0 0 1 0 1.414l-8 8a1 1 0 0 1-1.414 0l-3.5-3.5a1 1 0 0 1 1.414-1.414L6 12l7.293-7.293a1 1 0 0 1 1.414 0z" fill="currentColor"/>
+</svg>

src/assets/icons/clock.svg

@@ -0,0 +1,4 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M8 14A6 6 0 1 0 8 2a6 6 0 0 0 0 12z" stroke="currentColor" stroke-width="1.5"/>
+  <path d="M8 4v4l2.5 2.5" stroke="currentColor" stroke-width="1.5" stroke-linecap="round"/>
+</svg>

src/assets/icons/loader.svg

@@ -0,0 +1,3 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M8 2v2m0 8v2M4 8H2m12 0h-2m-1.172-4.828L9.414 4.586M6.586 11.414l-1.414 1.414m0-9.656l1.414 1.414m7.242 7.242l-1.414-1.414" stroke="currentColor" stroke-width="1.5" stroke-linecap="round"/>
+</svg>

src/assets/icons/settings.svg

@@ -0,0 +1,4 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M8 10a2 2 0 1 0 0-4 2 2 0 0 0 0 4z" stroke="currentColor" stroke-width="1.5"/>
+  <path d="M12.933 10a1.066 1.066 0 0 0 .213 1.173l.04.04a1.294 1.294 0 1 1-1.833 1.833l-.04-.04a1.067 1.067 0 0 0-1.813.76v.113a1.293 1.293 0 1 1-2.587 0v-.06a1.067 1.067 0 0 0-.7-1.013 1.067 1.067 0 0 0-1.173.213l-.04.04a1.294 1.294 0 1 1-1.833-1.833l.04-.04a1.067 1.067 0 0 0-.76-1.813h-.114a1.293 1.293 0 0 1 0-2.587h.06a1.067 1.067 0 0 0 1.013-.7 1.066 1.066 0 0 0-.213-1.173l-.04-.04A1.293 1.293 0 1 1 4.953 2.86l.04.04a1.067 1.067 0 0 0 1.813-.76v-.113a1.293 1.293 0 0 1 2.587 0v.06a1.067 1.067 0 0 0 1.873.913l.04-.04a1.294 1.294 0 1 1 1.833 1.833l-.04.04a1.066 1.066 0 0 0 .76 1.813h.114a1.293 1.293 0 0 1 0 2.587h-.06a1.067 1.067 0 0 0-.913.873l-.02.094z" stroke="currentColor" stroke-width="1.5"/>
+</svg>

src/assets/icons/trash.svg

@@ -0,0 +1,3 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M2 4h12M5.333 4V2.667A1.333 1.333 0 0 1 6.667 1.333h2.666A1.333 1.333 0 0 1 10.667 2.667V4m2 0v9.333A1.333 1.333 0 0 1 11.333 14.667H4.667A1.333 1.333 0 0 1 3.333 13.333V4h9.334zM6.667 7.333v4M9.333 7.333v4" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

src/assets/icons/x.svg

@@ -0,0 +1,3 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M12 4L4 12M4 4l8 8" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>