Emit progress updates during URL analysis and simulate gradual progress for long-running yt-dlp operations. Added QTimer import and a progress_update Signal on AnalysisThread, with emits at multiple analysis milestones (e.g. 15, 30, 60, 70, 85, 90, 92, 95, 100). In AnalysisMixin introduced _analysis_timer and _fake_progress, connected thread progress to _handle_analysis_progress, and implemented a _update_fake_progress timer that slowly advances the progress bar between real updates. Timers are stopped on real progress, completion or error and the UI progress is reset appropriately to improve UX during long extraction steps.
oop7
49dde84481