feat(ui): make edited file references clickable in desktop session UI

[anduimagui]

Issue for this PR

Closes #13430

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

This is a clean replacement for #15269, rebuilt on top of current dev so the diff stays focused on clickable file references in the desktop session UI.

It makes file references in session output clickable so users can open files directly from agent responses and tool results.

The change adds shared openFilePath plumbing, detects file-like inline code references (including path:line and file://...) in markdown, and wires clicks in edit/write/apply_patch file labels to open the file in the review panel.

Related work and how this is different (plain English)

• Related issue: [FEATURE]: Clickable file paths in agent responses #11432 asked for clickable file paths in agent responses.
• Related issue: [FEATURE]: Modified Files list clickable #14013 asked for the modified files list to be clickable.
• Related PR: feat: add clickable file paths in agent responses (web UI only) #11429 focuses on making file paths clickable in agent responses for web UI.
• Related PR: feat(tui): make modified files in sidebar clickable #14016 focuses on clickable modified files in TUI sidebar.

How this PR differs:

• This PR targets the app/ui path used by desktop/web session rendering and tool cards.
• It links inline code-style file references in markdown (for example src/foo.ts, src/foo.ts:42, and file://...) and also makes filenames inside edit/write/apply_patch cards clickable.
• Clicking opens the file in the existing review/file flow via shared openFilePath plumbing.
• It does not implement TUI sidebar behavior; that scope is covered by feat(tui): make modified files in sidebar clickable #14016.

How did you verify your code works?

• Confirmed the rebuilt branch diff is limited to the intended packages/ui and packages/app changes.
• bun typecheck in packages/ui currently fails locally because @tsconfig/node22/tsconfig.json is missing in this environment.
• bun typecheck in packages/app currently fails locally because workspace dependencies/types are unavailable in this environment.

Screenshots / recordings

• N/A

Notes

• Supersedes feat(ui): make edited file references clickable in desktop session UI #15269 with the same feature scope but without the merged dev history noise.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

Based on the search results, here are the related PRs:

Related PR #15269 - "feat(ui): make edited file references clickable in desktop session UI"

• This is the predecessor PR that the current PR (19153) supersedes. Per the PR description, feat(ui): make edited file references clickable in desktop session UI #19153 is a clean rebuild on top of current dev to keep the diff focused, replacing feat(ui): make edited file references clickable in desktop session UI #15269 which had merged dev history noise.

Related PR #18836 - "feat: add clickable markdown file references"

• This appears to address similar functionality for making file references clickable in markdown, likely related to the inline code reference detection mentioned in this PR.

Related PR #11429 - "feat: add clickable file paths in agent responses (web UI only)"

• This PR is mentioned in the description as related work focusing on making file paths clickable in agent responses for the web UI, while the current PR targets the app/ui path used by desktop/web session rendering.