feat: add icons to homepage header and navigation links

- Add blog icon to homepage welcome title
  - Newspaper/blog icon (48px, blue)
  - Centered with flex layout

- Add lightning icon to homepage subtitle
  - Lightning bolt icon (24px, gray)
  - Represents speed and modern tech

- Add home icon to navigation home link
  - House icon with clean design
  - Consistent styling with other nav elements

- Add login icon to navigation login link
  - Login/sign-in icon
  - Only shown when user is not logged in

- Use Heroicons SVG for consistency
- Responsive and accessible design
- Smooth hover transitions

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

templates/layouts/base.html

@@ -34,7 +34,12 @@
                 {{if .SiteLogoText}}{{.SiteLogoText}}{{else}}{{index .Tr "site_title"}}{{end}}
             </a>
             <div class="flex items-center gap-4">
-                <a href="/" class="text-gray-600 hover:text-blue-600 transition-colors text-sm">{{index .Tr "home"}}</a>
+                <a href="/" class="text-gray-600 hover:text-blue-600 transition-colors text-sm flex items-center gap-1.5">
+                    <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M3 12l2-2m0 0l7-7 7 7M5 10v10a1 1 0 001 1h3m10-11l2 2m-2-2v10a1 1 0 01-1 1h-3m-6 0a1 1 0 001-1v-4a1 1 0 011-1h2a1 1 0 011 1v4a1 1 0 001 1m-6 0h6"/>
+                    </svg>
+                    <span>{{index .Tr "home"}}</span>
+                </a>
                 {{if .IsLoggedIn}}
                     <!-- Avatar Dropdown (click to toggle) -->
                     <div class="relative" id="avatarDropdown">
@@ -72,7 +77,12 @@
                         </div>
                     </div>
                 {{else}}
-                    <a href="/login" class="text-gray-600 hover:text-blue-600 transition-colors text-sm">{{index .Tr "login"}}</a>
+                    <a href="/login" class="text-gray-600 hover:text-blue-600 transition-colors text-sm flex items-center gap-1.5">
+                        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M11 16l-4-4m0 0l4-4m-4 4h14m-5 4v1a3 3 0 01-3 3H6a3 3 0 01-3-3V7a3 3 0 013-3h7a3 3 0 013 3v1"/>
+                        </svg>
+                        <span>{{index .Tr "login"}}</span>
+                    </a>
                 {{end}}
             </div>
         </div>