[niksedk]

Adds Subtitle Edit Batch convert support (contract: SubtitleEdit/subtitleedit#16036, docs/plugin.md "Batch convert") to Word censor.

What it does

• plugin.json: "batch": true.
• batch request (headless, via PluginBootstrap.Run batch handler): loads the saved settings (mode, replacement text, red highlight) and censors every offensive word on all lines, the same as clicking Apply with every line checked (the window's default). No changes returns ok without a subtitle. Settings are not returned.
• configure request: the window opens in a settings-only state. The selection buttons and change list are hidden, a short "Batch convert settings" panel is shown, and the button reads OK and is always enabled. OK returns ok with settings + settingsVersion and no subtitle. Cancel returns cancelled.
• The settings load/save code moved from MainWindow into CensorSettings so the headless batch path can use it without touching Avalonia. The settings JSON is unchanged.

Decision: random modes in batch

Grawlix characters and random alternative words are random by design. The user chose these modes, so batch keeps them. To keep the run deterministic from saved settings, batch seeds the engine's Random from a stable FNV-1a hash of the file's text: converting the same file with the same settings gives the same output, and each file still gets its own picks. A normal run is unchanged and still uses an unseeded Random.

Compatibility

SE 5.3 ignores "batch" and only sends run. The run path works exactly as before.

Tests

• New se5/WordCensor.Tests project (modelled on FixEncodingErrors.Tests) with BatchModeTests (6 tests: grawlix on all lines, nothing to change, saved replacement + red, reproducible grawlix/alternative, settings round-trip). word-censor.yml now runs it in a test job before build, and its path filters include the test project.
• Ran the built dll end-to-end on batch request files: exit 0, censored SubRip returned, the same output on repeated runs, and ok with no subtitle for a clean file.
• Not tested: the configure window was not opened manually.

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