Major feature update: Enhanced RSS, voice fixes, dark mode, and UI improvements

## New Features
- Article Summary Mode: AI-generated 30-second summaries with complexity analysis
- Reading Stats Dashboard: Track articles read, listening time, and streaks
- Bookmark/Resume: Auto-save progress when pausing, resume from where you left off
- Audio Export: Export articles as downloadable WAV files
- RSS Feed Manager: Subscribe to feeds with real-time validation and 31+ recommendations
- Smart Speed: Auto-adjust playback based on article complexity
- Voice Moods: Quick presets for different listening scenarios

## RSS Enhancements
- Expanded recommendations from 8 to 31 sources across 5 categories:
  * General News (9 sources)
  * Technology (8 sources)
  * Business & Finance (5 sources)
  * Science & Research (5 sources)
  * International News (4 sources)
- Real-time URL validation with visual feedback
- Detailed error messages for different failure scenarios
- Always-visible categorized recommendations
- Auto-loading articles when feeds are added

## Bug Fixes
- Fixed voice selection: Selected voice now consistently applies to playback
- Implemented voice generation counter to prevent voice mixing between paragraphs
- Fixed speed control to snap to clean 0.5 increments (1.0, 1.5, 2.0, etc.)
- Fixed dark mode toggle by configuring Tailwind CDN for class-based dark mode
- Removed vibe visualizer animation

## UI/UX Improvements
- Redesigned voice selector with prominent voice panel and preview functionality
- Added voice cards with emojis and descriptions
- Enhanced feature toolbar with quick access to all new features
- Improved reader view with better typography and reading modes
- Added ambient reading modes (clean, sepia, night light)

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

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

constants.ts

@@ -2,12 +2,48 @@
 import { VoiceName } from './types';
 
 export const AVAILABLE_VOICES = [
-  { name: VoiceName.Puck, label: 'Puck (Standard American, Male)' },
-  { name: VoiceName.Charon, label: 'Charon (Deep, Authoritative Male)' },
-  { name: VoiceName.Kore, label: 'Kore (Soft, Calm Female)' },
-  { name: VoiceName.Fenrir, label: 'Fenrir (Mid-Atlantic/British Style, Male)' },
-  { name: VoiceName.Zephyr, label: 'Zephyr (Clear, Professional Female)' },
-  { name: VoiceName.Aoede, label: 'Aoede (Confident, Professional Female)' },
+  {
+    name: VoiceName.Puck,
+    label: 'Puck',
+    description: 'Standard American, Male',
+    emoji: '🎙️',
+    previewText: "Hey there! I'm Puck, your friendly news companion. Let me read the latest stories for you."
+  },
+  {
+    name: VoiceName.Charon,
+    label: 'Charon',
+    description: 'Deep & Authoritative, Male',
+    emoji: '🎭',
+    previewText: "Good day. I am Charon. I bring you the news with clarity and gravitas."
+  },
+  {
+    name: VoiceName.Kore,
+    label: 'Kore',
+    description: 'Soft & Calming, Female',
+    emoji: '🌸',
+    previewText: "Hello, I'm Kore. Let me gently guide you through today's stories in a calm, relaxing tone."
+  },
+  {
+    name: VoiceName.Fenrir,
+    label: 'Fenrir',
+    description: 'British Style, Male',
+    emoji: '🎩',
+    previewText: "Good evening. I'm Fenrir, bringing you the news with a touch of British sophistication."
+  },
+  {
+    name: VoiceName.Zephyr,
+    label: 'Zephyr',
+    description: 'Clear & Professional, Female',
+    emoji: '✨',
+    previewText: "Hi, I'm Zephyr. I deliver your news with crystal clear precision and professionalism."
+  },
+  {
+    name: VoiceName.Aoede,
+    label: 'Aoede',
+    description: 'Confident & Warm, Female',
+    emoji: '🌟',
+    previewText: "Hello! I'm Aoede. I'll share the day's stories with warmth and confidence."
+  },
 ];
 
 export const MIN_SPEED = 0.5;
@@ -15,3 +51,54 @@ export const MAX_SPEED = 3.5;
 export const SPEED_STEP = 0.5;
 
 export const SAMPLE_RATE = 24000;
+
+// Voice Moods - preset configurations for different listening contexts
+export const VOICE_MOODS: import('./types').VoiceMoodConfig[] = [
+  {
+    id: 'neutral',
+    label: 'Neutral',
+    emoji: '🎧',
+    description: 'Balanced, everyday listening',
+    recommendedVoice: VoiceName.Puck,
+    recommendedSpeed: 1.0
+  },
+  {
+    id: 'energetic',
+    label: 'Energetic',
+    emoji: '⚡',
+    description: 'Upbeat morning news',
+    recommendedVoice: VoiceName.Zephyr,
+    recommendedSpeed: 1.2
+  },
+  {
+    id: 'calm',
+    label: 'Calm',
+    emoji: '🌿',
+    description: 'Relaxed, peaceful listening',
+    recommendedVoice: VoiceName.Kore,
+    recommendedSpeed: 0.9
+  },
+  {
+    id: 'professional',
+    label: 'Professional',
+    emoji: '💼',
+    description: 'Business & serious topics',
+    recommendedVoice: VoiceName.Charon,
+    recommendedSpeed: 1.0
+  },
+  {
+    id: 'bedtime',
+    label: 'Bedtime',
+    emoji: '🌙',
+    description: 'Soothing for sleep',
+    recommendedVoice: VoiceName.Kore,
+    recommendedSpeed: 0.8
+  }
+];
+
+// Smart Speed multipliers based on article complexity
+export const SMART_SPEED_MULTIPLIERS = {
+  simple: 1.2,    // Faster for simple content
+  moderate: 1.0,  // Normal speed
+  complex: 0.85   // Slower for complex content
+};