Open DevTools after the renderer loads to fix the blank screen on a fresh config

[bcotrim]

Related issues

• None — hit while running npm start against an empty DEV_CONFIG_DIR.

How AI was used in this PR

Claude Code reproduced the failure, isolated the trigger across fresh/seeded configs and both renderers, and wrote the fix. Reviewed and verified locally.

Proposed Changes

• Starting Studio from source with a config that has no devToolsOpen (any fresh profile) opened a blank window. DevTools was attached before the first page load committed, which left the sandboxed renderer without its preload script — no window.ipcApi, so the renderer's bootstrap threw. DevTools now opens once the renderer has finished loading.
• Hits both the agentic and classic renderers; it's a renderer-process level failure, not a UI bug.
• Not user-facing: packaged builds compile the auto-open branch out and expose no way to open DevTools, so this is contributor-facing only.

Testing Instructions

1. DEV_CONFIG_DIR=/tmp/studio-fresh npm start
2. The app loads normally with DevTools open. On trunk the window is blank, the terminal logs Attempted to get the 'ipcNative' object but it was missing, and the console shows IPC API not available.
3. Restart with an existing config to confirm DevTools still respects the saved open/closed state.

Pre-merge Checklist

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

[wpmobilebot]

📊 Performance Test Results

Comparing aa2748f vs trunk

app-size

Metric	trunk	aa2748f	Diff	Change
App Size (Mac)	1406.61 MB	1406.61 MB	+0.00 MB	⚪ 0.0%

site-editor

Metric	trunk	aa2748f	Diff	Change
load	1045 ms	1001 ms	44 ms	⚪ 0.0%

site-startup

Metric	trunk	aa2748f	Diff	Change
siteCreation	7513 ms	7571 ms	+58 ms	🔴 0.8%
siteStartup	2869 ms	2867 ms	2 ms	⚪ 0.0%

---

Results are median values from multiple test runs.

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

[sejas]

I was able to start the app without refreshing it. I created a new site and it assigned the correct port. Thanks for the fix!