Add prompt_progress stream chunk + prefill progress on the status line

[jonathanKingston]

Recovered from the previously-unmerged branch claude/surface-percentages-ui-ug0792 (no PR had been opened), rebased onto current main.

What

Adds a prompt_progress stream chunk and surfaces prefill progress on the status line: a prompt_progress member on ProviderStreamChunk, forwarding through the agent run loop, a renderer case 'prompt_progress', and a tested promptProgressLabel() helper.

Notes

• Opened as draft — this is intentionally dormant scaffolding: no provider emits prompt_progress yet, so nothing renders until an emitter is added (e.g. an LM Studio prefill producer). Adopt as groundwork or close until the producer exists.
• Rebase adapted the branch's original StreamChunk addition to main's refactor by placing the member on ProviderStreamChunk (its correct home, matching how text/tool_call/reasoning are forwarded). npm run typecheck (node+web) passes clean.

🤖 Generated with Claude Code

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Generated by Claude Code

[github-actions]

E2E screenshot updates

Refreshed (1)

Clearly-different shots re-rendered by the CI e2e run and committed:

• titlebar-outline-icons.png —

Ignored as render noise (2)

These re-rendered below the variance threshold (font hinting / anti-alias wobble) and were not committed. To accept them anyway, add the update-screenshots label or commit the rendered PNGs by hand:

• ask-user-dialog.png — 0 px (0.0000%)
• open-in-editor-open.png — 0 px (0.0000%)

These PNGs live under tests/e2e/screenshots/ for human visual review; CI asserts DOM structure, not pixel diffs.

[github-actions]

Merge conflict needs a human

main advanced and screenshot conflicts were resolved automatically, but these non-screenshot files conflict and can't be auto-merged. Resolve them by hand (merge or rebase main):

• src/renderer/controller/agent.ts

[cursor]

PR health — leaving draft

CI is CLEAN, but the PR body marks this as intentional dormant scaffolding (prompt_progress with no provider emitter yet). Not marking ready / not enabling auto-merge until a producer lands or you want the groundwork merged alone.

  

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