Implement ScriptReviewSection component

- Created ScriptReviewSection component with script segment display
- Added speaker dropdown for each segment to allow editing assignments
- Implemented Generate Audiobook and Skip Review buttons
- Styled for readability and mobile responsiveness with Tailwind CSS
- Text segments displayed as read-only (only speaker assignment is editable)
- Follows existing component patterns from VoiceAssignmentSection
- Validates Requirements 15.3, 15.4, 15.5, 15.6, 15.8

frontend/src/components/ScriptReviewSection.tsx

@@ -0,0 +1,111 @@
+import type { Role, ScriptSegment } from '../api/tts';
+
+interface ScriptReviewSectionProps {
+  segments: ScriptSegment[];
+  roles: Role[];
+  onSegmentChange: (segmentId: string, newSpeaker: string) => void;
+  onGenerate: () => void;
+  onSkipReview: () => void;
+  isGenerating: boolean;
+}
+
+export default function ScriptReviewSection({
+  segments,
+  roles,
+  onSegmentChange,
+  onGenerate,
+  onSkipReview,
+  isGenerating,
+}: ScriptReviewSectionProps) {
+  const handleSpeakerChange = (segmentId: string, newSpeaker: string) => {
+    onSegmentChange(segmentId, newSpeaker);
+  };
+
+  return (
+    <div className="w-full max-w-4xl mx-auto p-4 sm:p-6">
+      <h2 className="text-xl sm:text-2xl font-bold mb-3 sm:mb-4">Review Script</h2>
+      
+      <p className="text-sm sm:text-base text-gray-600 mb-4 sm:mb-6">
+        Review the AI-generated script and adjust speaker assignments as needed.
+      </p>
+
+      {/* Script Segments */}
+      <div className="space-y-4 sm:space-y-6 mb-6 sm:mb-8">
+        {segments.map((segment, index) => (
+          <div 
+            key={segment.id} 
+            className="border-2 border-gray-300 rounded-lg p-3 sm:p-4 bg-white shadow-sm"
+          >
+            {/* Segment Header */}
+            <div className="flex flex-col sm:flex-row sm:items-center gap-2 sm:gap-4 mb-3">
+              <span className="text-xs sm:text-sm font-semibold text-gray-500">
+                Segment {index + 1}
+              </span>
+              
+              {/* Speaker Dropdown */}
+              <div className="flex items-center gap-2 flex-1">
+                <label className="text-xs sm:text-sm font-medium text-gray-700 whitespace-nowrap">
+                  Speaker:
+                </label>
+                <select
+                  value={segment.speaker}
+                  onChange={(e) => handleSpeakerChange(segment.id, e.target.value)}
+                  className="flex-1 p-2 sm:p-2 min-h-[44px] border-2 border-gray-300 rounded-lg focus:border-blue-500 focus:outline-none text-sm sm:text-base touch-manipulation"
+                  disabled={isGenerating}
+                >
+                  {roles.map((role) => (
+                    <option key={role.id} value={role.id}>
+                      {role.label}
+                    </option>
+                  ))}
+                </select>
+              </div>
+            </div>
+
+            {/* Segment Text */}
+            <div className="w-full min-h-[80px] p-3 border-2 border-gray-200 rounded-lg bg-gray-50 text-sm sm:text-base whitespace-pre-wrap">
+              {segment.text}
+            </div>
+          </div>
+        ))}
+      </div>
+
+      {/* Action Buttons */}
+      <div className="flex flex-col sm:flex-row gap-3 sm:gap-4 justify-center">
+        <button
+          onClick={onSkipReview}
+          disabled={isGenerating}
+          className={`w-full sm:w-auto px-6 py-3 min-h-[44px] rounded-lg font-semibold transition-colors touch-manipulation ${
+            isGenerating
+              ? 'bg-gray-300 text-gray-500 cursor-not-allowed'
+              : 'bg-gray-500 text-white hover:bg-gray-600 active:bg-gray-700 cursor-pointer'
+          }`}
+        >
+          Skip Review
+        </button>
+        
+        <button
+          onClick={onGenerate}
+          disabled={isGenerating}
+          className={`w-full sm:w-auto px-8 py-3 min-h-[44px] rounded-lg font-semibold text-white transition-colors touch-manipulation ${
+            isGenerating
+              ? 'bg-gray-400 cursor-not-allowed'
+              : 'bg-green-600 hover:bg-green-700 active:bg-green-800 cursor-pointer'
+          }`}
+        >
+          {isGenerating ? 'Generating...' : 'Generate Audiobook'}
+        </button>
+      </div>
+
+      {/* Info Message */}
+      {!isGenerating && (
+        <div className="mt-4 sm:mt-6 p-3 sm:p-4 bg-blue-50 border border-blue-200 text-blue-800 rounded text-sm sm:text-base">
+          <p className="font-semibold mb-1">💡 Tip:</p>
+          <p>
+            Review the AI-generated speaker assignments and make any necessary corrections before generating the audiobook.
+          </p>
+        </div>
+      )}
+    </div>
+  );
+}