Fix Logger.setLevel crash: use a logging.Filter to drop Image noise

Logger.setLevel('Image', 'CRITICAL') raised TypeError (takes 1 arg) and
crash-looped the player. Kivy routes all modules through the single 'kivy'
logger and the "[Image]" tag is just message-prefix formatting, so install a
logging.Filter on the 'kivy' logger that drops only
"Image: Error loading ..." records (benign: emitted by Video's inherited Image
loader) while keeping all other Kivy log records.

src/main.py

@@ -63,8 +63,21 @@ from kivy.logger import Logger
 # Kivy's Video widget subclasses Image, so its inherited image loader always
 # runs first and logs a harmless "Image: Error loading <file.mp4>" for every
 # video (the real decoding is done by the ffpyplayer CoreVideo provider).
-# Silence just that logger so genuine errors stay visible.
-Logger.setLevel('Image', 'CRITICAL')
+# Kivy routes every module through the single 'kivy' logger (the "[Image]" tag
+# is just Kivy's message-prefix formatting), so drop only that one message and
+# leave all other Kivy log records visible.
+import logging
+
+
+class _SuppressKivyImageNoise(logging.Filter):
+    def filter(self, record):
+        try:
+            return not record.getMessage().startswith('Image: Error loading')
+        except Exception:
+            return True
+
+
+logging.getLogger('kivy').addFilter(_SuppressKivyImageNoise())
 
 # Try to import evdev for card reader support (after Logger is available)
 try: