Show real-time progress feedback during push/pull from Studio Code

[youknowriad]

Related issues

• Fixes STU-1558

How AI was used in this PR

Claude identified the root causes and implemented the fix. I reviewed and tested the changes.

Proposed Changes

• Forward progress messages to the agent UI: captureCommandOutput now forwards progress messages to the previous callback instead of silently collecting them, so the agent UI receives live updates during push/pull operations.
• Route progress through the callback system: Push and pull commands were using logger.spinner.text (terminal-only) for progress updates. Switched to logger.reportProgress() which routes through the callback system and falls back to the spinner in terminal mode.
• Update progress in place: setLoaderMessage in the agent UI now updates a single Text node in place (via setText) instead of appending a new child for every progress message, matching how the terminal spinner works.
• Distinguish phases from progress updates: Added an update flag to the progress callback. reportProgress passes update: true to update the current line in place, while reportStart/reportSuccess/emitProgress create new lines — so phase changes (e.g., "Uploading…" → "Backing up remote site…") still appear as separate lines.

Testing Instructions

• Open Studio Code and push a local site to WordPress.com (e.g., "Push my site to example.com")
• Verify progress messages appear in real-time with percentage updates
• Verify phase changes (uploading → initiating import → backing up → applying changes) appear as separate lines
• Verify percentage updates within a phase update in place (not flooding new lines)
• Pull a site and verify backup/download progress is also shown
• Run studio push / studio pull from the CLI terminal and verify the spinner still works as before

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[wpmobilebot]

📊 Performance Test Results

Comparing 09cf1c1 vs trunk

app-size

Metric	trunk	09cf1c1	Diff	Change
App Size (Mac)	1286.16 MB	1286.17 MB	+0.00 MB	⚪ 0.0%

site-editor

Metric	trunk	09cf1c1	Diff	Change
load	1857 ms	1859 ms	+2 ms	⚪ 0.0%

site-startup

Metric	trunk	09cf1c1	Diff	Change
siteCreation	8114 ms	9107 ms	+993 ms	🔴 12.2%
siteStartup	4168 ms	4175 ms	+7 ms	⚪ 0.0%

---

Results are median values from multiple test runs.

Legend: 🟢 Improvement (faster) | 🔴 Regression (slower) | ⚪ No change (<50ms diff)

[epeicher]

Thanks @youknowriad for adding that! It greatly improves the UX for the push/pull processes. I have tested it, and it works as expected. I have also tested the existing studio push/pull commands and found no issues. LGTM!

CleanShot.2026-04-13.at.13.30.03.mp4

For reference, the error Error: result (122,311 characters) exceeds maximum allowed tokens. Output has been saved to is not related to this task.