Address code review and CodeQL feedback: fix assertion logic and URL checks

Agent-Logs-Url: https://github.com/thaitien280401-stack/RedditVideoMakerBot/sessions/51e17be8-4f67-4153-a83b-fffef32969b3

Co-authored-by: thaitien280401-stack <271128961+thaitien280401-stack@users.noreply.github.com>

tests/test_upload_integration.py

@@ -196,7 +196,7 @@ class TestTikTokUploadIntegration:
             url = uploader.upload(m)
 
             assert url is not None
-            assert "tiktok.com" in url
+            assert url.startswith("https://www.tiktok.com/")
 
 
 # ===================================================================
@@ -254,4 +254,4 @@ class TestFacebookUploadIntegration:
             url = uploader.upload(m)
 
             assert url is not None
-            assert "facebook.com" in url
+            assert url.startswith("https://www.facebook.com/")

tests/test_videos.py

@@ -67,5 +67,5 @@ class TestSaveData:
         with patch("builtins.open", m):
             save_data("test_channel", "output2.mp4", "Another Title", "thread_123", "gta")
 
-        # Should not write anything since ID exists
-        assert not m().write.called or m().seek.called is False
+        # Verify no new data was written (duplicate ID skipped)
+        assert not m().write.called

tests/test_voice.py

@@ -43,12 +43,9 @@ class TestSanitizeText:
 
         text = "1+1 equals 2"
         result = sanitize_text(text)
-        # The + is replaced by "plus" via str.replace before regex strips it
-        # However, the regex removes standalone + first.
-        # The replacement text.replace("+", "plus") runs after regex.
-        # So "1+1" → regex removes "+" → "1 1" → replace doesn't find "+" → "1 1"
-        # But text.replace runs on the result, so let's check actual behavior.
+        # Verify numeric content is preserved after sanitization
         assert "1" in result
+        assert "equals" in result
 
     def test_removes_extra_whitespace(self):
         from utils.voice import sanitize_text