v4: production rewrite — real progress, durations, richer UX

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Complete rewrite of the application. Highlights:

- Real progress bar driven by ffmpeg '-progress pipe:1' (out_time_ms vs
  total duration), held at 99% until 'progress=end' then snapped to 100%
  so the bar no longer jumps/catches up at the finish
- ffprobe-based per-file duration scanning in background threads, cached
  per item; running total shown; probes parallelised (one thread per file)
- No console/bash windows on Windows: CREATE_NO_WINDOW on all subprocesses
- Optional drag-and-drop via tkinterdnd2 with a graceful fallback
- Card-based scrollable UI with rows of (# index, checkbox, name, duration),
  per-row activate/highlight, plus Move Up/Down/Remove/Select All/Select None
- Output settings: name + extension dropdown + directory, with live output
  path preview
- Start/Stop control: terminate ffmpeg and delete the partial output on stop;
  overwrite, name-conflict, and single-file guards before starting
- Elapsed / ETA / speed readout, collapsible ffmpeg log, light/dark toggle
- Locate ffmpeg/ffprobe next to the exe/script (PyInstaller-friendly) then PATH
- Output hardening: -movflags +faststart and -nostdin

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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youfu

2026-06-26 13:27:37 +00:00

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commit a35b2c6498

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