feat: rename link color to --color-link and add dark/light theme support

- Rename CSS variable from --link-color to --color-link
- Add linkColorDark and linkColorLight settings (replacing single linkColor)
- Add --color-link to dark and light theme CSS variables
- Use CSS var() references to automatically switch based on theme
- Update settings UI to show separate color pickers for dark and light themes
- Default: dark=#38bdf8 (sky-400), light=#3b82f6 (blue-500)
- Update all CSS references to use new variable name

src/components/Settings.tsx

@@ -51,7 +51,8 @@ const DEFAULT_SETTINGS: UserSettings = {
   ttsDetectContentLanguage: true,
   ttsLanguageMode: 'content',
   ttsDefaultSpeed: 2.1,
-  linkColor: '#38bdf8',
+  linkColorDark: '#38bdf8',
+  linkColorLight: '#3b82f6',
 }
 
 interface SettingsProps {

src/components/Settings/ReadingDisplaySettings.tsx

@@ -110,11 +110,22 @@ const ReadingDisplaySettings: React.FC<ReadingDisplaySettingsProps> = ({ setting
       </div>
 
       <div className="setting-group setting-inline">
-        <label className="setting-label">Link Color</label>
+        <label className="setting-label">Link Color (Dark)</label>
         <div className="setting-control">
           <ColorPicker
-            selectedColor={settings.linkColor || '#38bdf8'}
-            onColorChange={(color) => onUpdate({ linkColor: color })}
+            selectedColor={settings.linkColorDark || '#38bdf8'}
+            onColorChange={(color) => onUpdate({ linkColorDark: color })}
+            colors={LINK_COLORS}
+          />
+        </div>
+      </div>
+
+      <div className="setting-group setting-inline">
+        <label className="setting-label">Link Color (Light)</label>
+        <div className="setting-control">
+          <ColorPicker
+            selectedColor={settings.linkColorLight || '#3b82f6'}
+            onColorChange={(color) => onUpdate({ linkColorLight: color })}
             colors={LINK_COLORS}
           />
         </div>
@@ -191,7 +202,8 @@ const ReadingDisplaySettings: React.FC<ReadingDisplaySettingsProps> = ({ setting
             fontSize: `${settings.fontSize || 21}px`,
             '--highlight-rgb': hexToRgb(settings.highlightColor || '#ffff00'),
             '--paragraph-alignment': settings.paragraphAlignment || 'justify',
-            '--link-color': settings.linkColor || '#38bdf8'
+            '--color-link-dark': settings.linkColorDark || '#38bdf8',
+            '--color-link-light': settings.linkColorLight || '#3b82f6'
           } as React.CSSProperties}
         >
           <h3>The Quick Brown Fox</h3>

src/hooks/useSettings.ts

@@ -68,8 +68,13 @@ export function useSettings({ relayPool, eventStore, pubkey, accountManager }: U
       root.setProperty('--highlight-color-friends', settings.highlightColorFriends || '#f97316')
       root.setProperty('--highlight-color-nostrverse', settings.highlightColorNostrverse || '#9333ea')
       
-      // Set link color
-      root.setProperty('--link-color', settings.linkColor || '#38bdf8')
+      // Set link colors for dark and light themes
+      // Store both values on root - CSS will use the appropriate one based on theme
+      const darkLinkColor = settings.linkColorDark || '#38bdf8'
+      const lightLinkColor = settings.linkColorLight || '#3b82f6'
+      
+      root.setProperty('--color-link-dark', darkLinkColor)
+      root.setProperty('--color-link-light', lightLinkColor)
       
       // Set paragraph alignment
       root.setProperty('--paragraph-alignment', settings.paragraphAlignment || 'justify')

src/services/settingsService.ts

@@ -74,8 +74,9 @@ export interface UserSettings {
   ttsLanguageMode?: 'system' | 'content' | string // default: 'content', can also be language code like 'en', 'es', etc.
   // Text-to-Speech settings
   ttsDefaultSpeed?: number // default: 2.1
-  // Link color for article content
-  linkColor?: string // default: #38bdf8 (sky-400)
+  // Link color for article content (theme-specific)
+  linkColorDark?: string // default: #38bdf8 (sky-400)
+  linkColorLight?: string // default: #3b82f6 (blue-500)
 }
 
 /**

src/styles/base/variables.css

@@ -57,6 +57,7 @@
   --color-text-muted: #71717a;   /* zinc-500 */
   --color-primary: #6366f1;      /* indigo-500 */
   --color-primary-hover: #4f46e5; /* indigo-600 */
+  --color-link: var(--color-link-dark, #38bdf8); /* sky-400 */
 }
 
 /* Light theme */
@@ -73,6 +74,7 @@
   --color-text-muted: #6b7280;   /* gray-500 */
   --color-primary: #4f46e5;      /* indigo-600 */
   --color-primary-hover: #4338ca; /* indigo-700 */
+  --color-link: var(--color-link-light, #3b82f6); /* blue-500 */
   
   /* Highlight colors for light theme - use same Tailwind colors */
   --highlight-color-mine: #fde047;      /* yellow-300 */
@@ -97,6 +99,7 @@
     --color-text-muted: #71717a;
     --color-primary: #6366f1;
     --color-primary-hover: #4f46e5;
+    --color-link: var(--color-link-dark, #38bdf8);
   }
 }
 
@@ -112,6 +115,7 @@
     --color-text-muted: #6b7280;
     --color-primary: #4f46e5;
     --color-primary-hover: #4338ca;
+    --color-link: var(--color-link-light, #3b82f6);
     
     /* Standard highlight colors */
     --highlight-color-mine: #fde047;

src/styles/components/forms.css

@@ -44,7 +44,7 @@
   text-align: var(--paragraph-alignment, justify);
 }
 .preview-content a {
-  color: var(--link-color, #38bdf8);
+  color: var(--color-link);
   text-decoration: none;
 }
 .preview-content a:hover {

src/styles/components/reader.css

@@ -160,7 +160,7 @@
   opacity: 0.69;
   margin: 2.5rem 0;
 }
-.reader-markdown a { color: var(--link-color, #38bdf8); text-decoration: none; }
+.reader-markdown a { color: var(--color-link); text-decoration: none; }
 .reader-markdown a:hover { text-decoration: underline; }
 .reader-markdown code { background: var(--color-bg-subtle); border: 1px solid var(--color-border); border-radius: 4px; padding: 0.15rem 0.4rem; font-size: 0.9em; font-family: 'Monaco', 'Menlo', 'Consolas', 'Courier New', monospace; }
 .reader-markdown pre { background: var(--color-bg-subtle); border: 1px solid var(--color-border); border-radius: 8px; padding: 1rem; overflow-x: auto; margin: 1rem 0; line-height: 1.5; font-family: 'Monaco', 'Menlo', 'Consolas', 'Courier New', monospace; }