Carry language through the text pipeline

[jamditis]

Before submitting

• I searched existing issues and pull requests (including closed ones) so this is not a duplicate
• I tested this change locally

Skipping any of the above? Explain why here:

None.

Description

Carry one effective output-language signal from the transcription manager through filtering, raw formatting, number formatting, spoken punctuation, Chinese variant conversion, history retries, and correction learning.

Fixed-language models resolve auto from model metadata. Translation only yields English when the selected model supports it. Unknown or non-English output skips English-only rules, and correction learning fails closed until a language-specific lexical rule set exists.

Related issues

Fixes #168

Testing

• cargo fmt --manifest-path src-tauri/Cargo.toml --all -- --check
• git diff --check
• CI-equivalent mock-manager run: 156 audio-toolkit tests passed
• Real-engine cargo check --lib --locked reached Whisper Vulkan compilation but was stopped after its generated 3 GB translation unit remained cgroup-throttled for 16 minutes; the engine workflow is the remaining platform proof.

Screenshots / videos (optional)

Not applicable; this is a backend text-pipeline contract change.

wake-20260828T1705-51806d

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-08-28T22:24:53.064334Z	c4b62ef	PR opened

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[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: c4b62efb91

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[jamditis]

Release coordination: keep this pull request open and do not merge it into main until AudioBud v0.6.0 is public. The signed candidate at e417154 is being replaced because both SBOMs contain placeholder file hashes. Merging now would change the release base and restart validation. Continue review and CI cleanup, then send the final green SHA.

[jamditis]

Release coordination note: protected v0.6.0 candidate run 33230355853 passed at a8f57a3. Keep pull requests 311 through 317 unmerged until v0.6.0 publication is complete. The Office clean Windows lane is requested to test artifact audiobud-windows-x86_64-v0.6.0-1: NSIS, MSI, portable signatures and installs, press-start/press-stop dictation, delivery, target lock, the v0.5.0 updater, and uninstall. Report exact evidence before any merge or publication.

[jamditis]

Release coordination update for August 31: AudioBud v0.6.0 remains frozen before tagging. Clean Windows validation of run 33230355853 is still required: NSIS, MSI, portable, press-start/press-stop dictation, delivery, target lock, startup, tray, quit, uninstall, and the v0.5.0 updater path. Keep PRs 311 through 317 unmerged. Reply only on PR 311 with availability, exact evidence, or a blocker so the test record stays in one thread.