Stream writing results and add result copy with ⇧⌘C

[wanming]

Requested by Tom · project thread

Before: after pressing Enter, the popover shows "Transforming..." beside three static dots until the whole answer arrives. A result can only be inserted, so when there is no app to insert into, the user is stuck with the "Could not find the target app" error.

After: the result area appears as soon as the first words arrive and grows as text streams in, scrolling to keep the newest line visible. The toolbar shows an esc Stop hint, and stopping discards the partial text. The finished result replaces the streamed text and is editable as before. The result also has an icon-only copy button with a tooltip and VoiceOver label. Shift+Command+C copies the whole result from either editor. Copying shows a checkmark briefly and leaves the popover open. Plain Command+C still copies only the selection.

How: LLMProvider gains streamTransform(_:onPartialOutput:). Its default implementation calls transform, so Anthropic, Gemini and chat-completion providers behave as they do today. OpenAIProvider implements it with "stream": true and a small ResponseStreamParser for Responses API server-sent events. That parser handles text deltas, a fallback to response.completed, and error/response.failed events. TransformationService forwards trimmed partials and keeps the existing timeout and connection-lost retry. The view model publishes streamingResultText on the main queue and uses a generation counter so late partials from a cancelled run are dropped. The view shows that text read-only while transforming. WritingPopoverKeyboardPolicy maps Shift+Command+C by character (not key code), so it follows non-QWERTY layouts, and ignores it while composing input. New strings popover.hint.stop, popover.action.copyResult and popover.action.copyResultHelp are added and popover.hint.accessibility is updated in all 10 languages. Both READMEs and the manual checklist are updated.

Notes for review:

• The total request timeout is unchanged (20 s default). A very long answer can still time out mid-stream, and the partial text is then discarded, as it would have been before. Treating the timeout as time to first token could be a follow-up.
• Shift+Command+C is not shown in the bottom hint bar because the bar is already full. It appears in the copy button tooltip and the VoiceOver hint.
• swift test and the localization checks pass in CI on macOS 15. An equivalent build of the shortcut was run locally as Inklet Local.

Manual QA (not run): see the new "Streaming result", "Streaming cancellation" and "Copy result" items in docs/manual-test-checklist.md.

🤖 Generated with Claude Code

https://claude.ai/code/session_01BXH1caQ6B1mSdP4axrmkow