[guiyanakuang]

Summary

Pastes that CrossPaste produces itself — OCR "Extract text" and process plugin output (e.g. the bundled Translate plugin) — now carry source = "CrossPaste", and their source icon is CrossPaste's own Mac-style app icon, rendered through exactly the same pipeline as every captured app icon.

Changes

• OCR extract text (ExtractTextMenuContributor) and plugin replaceClipboard output: our own pasteboard writes are never captured by the pasteboard listener (self-write detection), so the result previously reached the clipboard without a history entry. They now follow the same path as crosspaste copy in the CLI: createLocalPasteData(source = AppName) first, then tryWritePasteboard(id = …, localOnly = true) so the listener ignores the write and sync goes through the normal local release.
• Plugin newPaste output: source changes from the plugin's manifest id to AppName.
• Source icon: on GUI startup, the bundled Mac-style app icon (crosspaste_mac.png, the same one Conveyor packages for macOS, transparent padding included) is written to icons/<local appInstanceId>/CrossPaste.png. The existing Coil fetcher, the side-title alpha-trim + crop transformation, the title background color extraction and the icon push to peers all pick it up with no UI special case, so it is cropped and tinted exactly like other app icons. It is rewritten on every launch so it follows logo changes across upgrades.

Testing

• Updated ProcessPluginRunnerTest and ExtractTextMenuContributorTest to assert the paste is recorded with AppName as source and the clipboard write uses the new paste id.
• Ran the bundled icon and a captured Chrome icon through AppSourceIconCropTransformation side by side; both come out framed identically.
• ./gradlew app:desktopTest passes.