feat: implement color theme switcher with dynamic button colors

Complete color theme system (light/dark/auto) with dynamic UI:

Features:
- Color theme switcher with auto/light/dark modes
- Dynamic button colors on hover (purple/yellow/blue per theme)
- localStorage persistence across sessions
- Proper button positioning (desktop and mobile)
- Mobile: 5-button layout with theme before info button

Fixes:
- CSP updated to allow jsDelivr CDN for iconify icons
- Button repositioning: Download PDF and Print Friendly at top
- Hover-only colors (not persistent)
- Mobile button order corrected

Files:
- static/css/color-theme.css - Theme system with CSS variables
- static/js/color-theme.js - Theme switching logic
- templates/partials/color-theme-switcher.html - Button component
- internal/middleware/security.go - CSP fix for jsDelivr
- tests/mjs/13-color-theme-switcher.test.mjs - Comprehensive test
- tests/TEST-SUMMARY.md - Updated test documentation

templates/cv-content.html

@@ -4,7 +4,8 @@
       aria-live="polite">
 <!-- PAGE 1 -->
 <div class="cv-page page-1">
-<div id="cv-inner-content-page-1" class="cv-page-content-wrapper">
+<div id="cv-inner-content-page-1" class="cv-page-content-wrapper"
+     _="on htmx:oobAfterSwap wait 100ms then remove .loading from me">
     {{template "title-badges" .}}
 
     <!-- Page 1 Content Grid: Left Sidebar + Main Content -->
@@ -47,7 +48,8 @@
 
 <!-- PAGE 2 -->
 <div class="cv-page page-2">
-<div id="cv-inner-content-page-2" class="cv-page-content-wrapper">
+<div id="cv-inner-content-page-2" class="cv-page-content-wrapper"
+     _="on htmx:oobAfterSwap wait 100ms then remove .loading from me">
     {{template "title-badges" .}}
 
     <!-- Page 2 Content Grid: Main Content + Right Sidebar -->