Support applying pitch from wave part

[yqzhishen]

Please merge #2019 first.

Motivation

Previous PR #2004 introduced RMVPE as an optional step after MIDI transcription to extract pitch from the wave part and apply it on the transcribed voice part.

This PR extends the scenario: user should be able to extract pitch from a wave part and apply it on existing voice part.

Implementation

A new context menu Apply pitch from... is added on voice part in the track window. User can then select a wave part, extract pitch from it, and apply the pitch on the voice part. This action takes time offset into consideration, so user can align the audio with the notes beforehand. Only pitch from the overlapped region between the voice part and the audio part (with 1000ms padding for context) is extracted, in order not to waste computational resources.

This PR also includes some slight changes in the string resources.

[Copilot]

Pull request overview

Adds a new workflow to extract pitch (PITD) from an existing wave part and apply it to an existing voice part, and extends transcription-related cancellation/interruption support so long-running ONNX inference can be stopped when the progress dialog is closed.

Changes:

• Add a voice-part context submenu (“Apply pitch from…”) listing wave parts as pitch sources, and run RMVPE over the overlapped time window.
• Add cancellation-driven interruption plumbing for SOME/GAME/RMVPE inference via ONNX RunOptions.Terminate.
• Extend RMVPE application to support time offsets and apply PITD via undoable curve commands.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
OpenUtau/Views/MainWindow.axaml.cs	Builds the new context menu, implements “apply pitch from wave part”, and updates transcription flow cancellation + offset application.
OpenUtau/Views/MainWindow.axaml	Adds the “Apply pitch from…” submenu binding in the parts context menu.
OpenUtau/ViewModels/MainWindowViewModel.cs	Extends context menu args with PartApplyPitchMenuItems.
OpenUtau/Strings/Strings.axaml	Adds new context-menu and progress strings; updates RMVPE checkbox label wording.
OpenUtau/Strings/Strings.zh-CN.axaml	Adds Chinese translations for the new strings and RMVPE label.
OpenUtau.Core/Analysis/MidiExtractor.cs	Adds cancellation handling and a base Interrupt() hook for extractors.
OpenUtau.Core/Analysis/Some.cs	Implements interruption by terminating ONNX runs and mapping termination to cancellation.
OpenUtau.Core/Analysis/Game.cs	Implements interruption/termination for GAME’s multiple ONNX sessions and pipeline.
OpenUtau.Core/Analysis/Rmvpe.cs	Adds inference windowing + interruption, offset support when applying pitch, and uses undoable curve command to set PITD.

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