Fix scanline animation race condition in AnalyzeStage (#51)

Renamed the keyframes in `AnalyzeStage.tsx` to `scanline-analyze` to prevent conflict with the global `scanline` animation.
Also removed unused `scanline` keyframes from `RefineStage.tsx` to avoid potential future conflicts.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

src/ui/components/extractor/AnalyzeStage.tsx

@@ -17,7 +17,7 @@ export const AnalyzeStage: React.FC<AnalyzeStageProps> = ({ imageSrc, isAnalyzin
           {/* Scan Line Animation (only when analyzing) */}
           {isAnalyzing && (
             <div className="absolute inset-0 pointer-events-none z-20 overflow-hidden">
-              <div className="w-full h-[2px] bg-cyan-400 shadow-[0_0_20px_rgba(34,211,238,0.8)] animate-[scanline_2s_linear_infinite]"></div>
+              <div className="w-full h-[2px] bg-cyan-400 shadow-[0_0_20px_rgba(34,211,238,0.8)] animate-[scanline-analyze_2s_linear_infinite]"></div>
             </div>
           )}
 
@@ -32,7 +32,7 @@ export const AnalyzeStage: React.FC<AnalyzeStageProps> = ({ imageSrc, isAnalyzin
         </div>
       </div>
       <style>{`
-        @keyframes scanline {
+        @keyframes scanline-analyze {
           0% {
             transform: translateY(-100%);
           }

src/ui/components/extractor/RefineStage.tsx

@@ -153,16 +153,6 @@ export const RefineStage: React.FC<RefineStageProps> = ({
         </div>
       )}
 
-      <style>{`
-        @keyframes scanline {
-          0% {
-            transform: translateY(-100%);
-          }
-          100% {
-            transform: translateY(400px);
-          }
-        }
-      `}</style>
     </div>
   )
 }