fix: apply CodeRabbit auto-fixes

Fixed 3 file(s) based on 3 unresolved review comments.

Co-authored-by: CodeRabbit <noreply@coderabbit.ai>

aeonview.py

@@ -365,11 +365,14 @@ class AeonViewHelpers:
             logging.error(AeonViewMessages.INVALID_IMAGE_EXTENSION)
             return None
 
-        if url.endswith(".png"):
+        url_lower = url.lower()
+        if url_lower.endswith(".jpeg"):
+            return ".jpeg"
+        if url_lower.endswith(".png"):
             return ".png"
-        if url.endswith(".gif"):
+        if url_lower.endswith(".gif"):
             return ".gif"
-        if url.endswith(".webp"):
+        if url_lower.endswith(".webp"):
             return ".webp"
 
         return ".jpg"
@@ -397,6 +400,7 @@ class AeonViewHelpers:
         """
         return [
             "ffmpeg",
+            "-y",
             "-framerate",
             str(fps),
             "-pattern_type",
@@ -531,4 +535,4 @@ if __name__ == "__main__":
     app = AeonViewApp()
     app.run()
 
-# vim: set tw=100 fo=cqt wm=0 et:
+# vim: set tw=100 fo=cqt wm=0 et: