fix(viewer): preserve semantic response chunks

[Lint111]

Summary

Make the response viewer preserve semantic reply boundaries and support lossless whole-chunk copy on desktop and mobile.

Changes

• Remove terminal-buffer fallback from Last Response.
  • An empty structured transcript now shows the existing empty-state message.
  • It no longer presents the entire terminal history as if it were one agent reply.
• Store each reply's raw transcript text on its owning response node.
• Double-click or double-tap a reply to copy that complete raw chunk.
• Ignore copy gestures that originate from buttons, links, fields, or editable content.
• Keep existing one-click code-block copy and diagram wrap controls unchanged.
• Show brief visual confirmation after a successful whole-chunk copy.
• Use mobile terminal feedback when that optional control layer is present.

Behavior

• Last Response remains a single structured reply.
• More remains the explicit path to the full conversation.
• Raw Markdown, whitespace, and code fences survive whole-reply copy without depending on rendered HTML.

Validation

• npx vitest run --config config/vitest.config.ts test/response-viewer.test.ts
  • 2 tests passed
• npm run check:frontend-syntax
  • 26 frontend files passed
• npm run build
  • passed

Scope

This PR does not add click-to-collapse for response messages. That interaction was discussed but is not implemented in the audited change set and should be reviewed independently from copy/source correctness.

[Copilot]

Pull request overview

Preserves semantic response boundaries in the Response Viewer by attaching raw transcript text to each rendered response node and enabling lossless whole-chunk copy via a double-click/double-tap gesture, while removing the misleading terminal-buffer fallback for “Last Response”.

Changes:

• Removed terminal-buffer fallback for Last Response and left the existing empty-state message when the structured transcript is empty.
• Stored raw transcript source (_codemanCopyText) on the owning response DOM node and added dblclick-based whole-chunk copy with feedback + gesture filtering.
• Added a focused test suite covering empty transcript behavior and chunk-copy source selection.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
test/response-viewer.test.ts	Adds regression tests for empty transcript handling and whole-chunk copy behavior.
src/web/public/styles.css	Adds copy-feedback animation and touch-action: manipulation for the response viewer / messages.
src/web/public/app.js	Implements semantic chunk copy, stores raw source on nodes, and removes terminal fallback from Last Response.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Ark0N]

Hi Lior, closing this one as part of a cleanup of the seventeen PRs currently open from you. The full explanation is in #173, and I would rather you read that one than this note, because it is the honest version and it is not a dismissal of your work.

The short form: sixteen PRs opened in a single day, roughly 42,000 added lines in total, landing mostly on the same few files (nine touch app.js, eight touch terminal-ui.js), with five already conflicting against master and none carrying CI results. I cannot review that at the standard this codebase needs, and merging it at a lower standard would be worse than not merging it.

Going forward, please keep no more than three open PRs at a time, each one a single behavior change that stands on its own, with a test that fails on master and passes with the fix. #214 and #215, merged today, are good models.

If this particular change fixes something that genuinely annoys you in daily use, it is a good candidate to be the first one you reopen on its own, rebased on current master. I will review it properly.

Thanks for the effort you put in, and sorry to close it this way.