fix: Bidirectional hover sync + theme-aware CV text colors

**Bug 1: Bidirectional Hover Sync**
- Fixed hover sync to work in BOTH directions
- Hovering left buttons → highlights menu buttons (was working)
- Hovering menu buttons → highlights left buttons (NOW WORKING)
- Added .download-btn and .print-friendly-btn to syncPdfHover/syncPrintHover selectors

**Bug 2: Theme-Aware CV Text Colors**
- CV content text now adapts to light/dark themes
- Light theme: Dark text (#1a1a1a, #333333) for readability
- Dark theme: Light text (#e0e0e0, #d0d0d0) for readability
- Added theme-specific overrides for --text-dark and --text-gray variables
- Solution uses CSS variables (not hardcoded) for future flexibility

Changes:
- static/hyperscript/hover-sync._hs: Added left-side button selectors
- static/css/color-theme.css: Added legacy variable overrides for all themes

static/css/color-theme.css

@@ -53,6 +53,10 @@
 
   /* Sidebar (for non-clean theme) */
   --sidebar-bg: #d1d4d2;
+
+  /* Legacy CV content variables - theme-aware overrides */
+  --text-dark: #1a1a1a;  /* Dark text for light background */
+  --text-gray: #333333;  /* Secondary text for light background */
 }
 
 /* ==============================================================================
@@ -97,6 +101,10 @@
 
   /* Sidebar (for non-clean theme) */
   --sidebar-bg: #2a2a2a;
+
+  /* Legacy CV content variables - theme-aware overrides */
+  --text-dark: #e0e0e0;  /* Light text for dark background */
+  --text-gray: #d0d0d0;  /* Secondary text for dark background */
 }
 
 /* ==============================================================================
@@ -142,6 +150,10 @@
 
     /* Sidebar (for non-clean theme) */
     --sidebar-bg: #2a2a2a;
+
+    /* Legacy CV content variables - theme-aware overrides */
+    --text-dark: #e0e0e0;  /* Light text for dark background */
+    --text-gray: #d0d0d0;  /* Secondary text for dark background */
   }
 }