[Error Overlay] Comprehensive refinement

[raunofreiberg]

This PR adds a lot of polish to the experimental Error Overlay:

CleanShot.2025-01-30.at.13.12.34.mp4

Motion

• Stacked layers transition smoothly when switching between errors
• Height transition for the dialog panel to complement the stacked layers transition
• Dialog contents and the backdrop fade in as per Geist Motion Guidelines (scale, opacity)

Design

• New language icon based on file extension à la (app.tsx)
• Shadows are clipped with translucent borders to visually be more crisp
• Use backdrop-filter: blur() for backdrop to blend with application content
• Use font-variant-numeric: tabular-nums for ←→ switcher to avoid layout shift
• Misc alignment improvements

Interactions

• Focus is now trapped in the dialog, Escape will un-trap and re-focus the last root.activeElement
• Focus states for all interactive elements
• Fluid reveal & collapse of ignored Call Stack items ↓

CleanShot.2025-01-30.at.21.37.30-converted.mp4

Closes NDX-711
Closes NDX-744

[ijjk]

Tests Passed

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js rf/errors-overlay-polish	Change
buildDuration	24.5s	19.8s	N/A
buildDurationCached	18.7s	16s	N/A
nodeModulesSize	392 MB	392 MB	⚠️ +380 kB
nextStartRea..uration (ms)	498ms	490ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js rf/errors-overlay-polish	Change
5306-HASH.js gzip	54 kB	54 kB	N/A
8276.HASH.js gzip	169 B	168 B	N/A
8377-HASH.js gzip	5.46 kB	5.46 kB	N/A
bccd1874-HASH.js gzip	52.9 kB	52.9 kB	N/A
framework-HASH.js gzip	57.5 kB	57.5 kB	N/A
main-app-HASH.js gzip	241 B	242 B	N/A
main-HASH.js gzip	34.5 kB	34.5 kB	N/A
webpack-HASH.js gzip	1.71 kB	1.71 kB	N/A
Overall change	0 B	0 B	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js rf/errors-overlay-polish	Change
polyfills-HASH.js gzip	39.4 kB	39.4 kB	✓
Overall change	39.4 kB	39.4 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js rf/errors-overlay-polish	Change
_app-HASH.js gzip	193 B	193 B	✓
_error-HASH.js gzip	193 B	193 B	✓
amp-HASH.js gzip	512 B	510 B	N/A
css-HASH.js gzip	343 B	342 B	N/A
dynamic-HASH.js gzip	1.84 kB	1.84 kB	✓
edge-ssr-HASH.js gzip	265 B	265 B	✓
head-HASH.js gzip	363 B	362 B	N/A
hooks-HASH.js gzip	393 B	392 B	N/A
image-HASH.js gzip	4.59 kB	4.58 kB	N/A
index-HASH.js gzip	268 B	268 B	✓
link-HASH.js gzip	2.35 kB	2.35 kB	N/A
routerDirect..HASH.js gzip	328 B	328 B	✓
script-HASH.js gzip	397 B	397 B	✓
withRouter-HASH.js gzip	323 B	326 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	3.59 kB	3.59 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js rf/errors-overlay-polish	Change
_buildManifest.js gzip	748 B	747 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js rf/errors-overlay-polish	Change
index.html gzip	525 B	524 B	N/A
link.html gzip	539 B	538 B	N/A
withRouter.html gzip	520 B	520 B	✓
Overall change	520 B	520 B	✓

Edge SSR bundle Size

	vercel/next.js canary	vercel/next.js rf/errors-overlay-polish	Change
edge-ssr.js gzip	130 kB	130 kB	N/A
page.js gzip	210 kB	210 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	vercel/next.js rf/errors-overlay-polish	Change
middleware-b..fest.js gzip	676 B	671 B	N/A
middleware-r..fest.js gzip	155 B	156 B	N/A
middleware.js gzip	31.3 kB	31.3 kB	N/A
edge-runtime..pack.js gzip	844 B	844 B	✓
Overall change	844 B	844 B	✓

Next Runtimes Overall increase ⚠️

	vercel/next.js canary	vercel/next.js rf/errors-overlay-polish	Change
app-page-exp...dev.js gzip	385 kB	393 kB	⚠️ +8.19 kB
app-page-exp..prod.js gzip	132 kB	132 kB	✓
app-page-tur..prod.js gzip	145 kB	145 kB	✓
app-page-tur..prod.js gzip	141 kB	141 kB	✓
app-page.run...dev.js gzip	372 kB	380 kB	⚠️ +8.21 kB
app-page.run..prod.js gzip	128 kB	128 kB	✓
app-route-ex...dev.js gzip	39.3 kB	39.3 kB	✓
app-route-ex..prod.js gzip	25.6 kB	25.6 kB	✓
app-route-tu..prod.js gzip	25.6 kB	25.6 kB	✓
app-route-tu..prod.js gzip	25.4 kB	25.4 kB	✓
app-route.ru...dev.js gzip	40.8 kB	40.8 kB	✓
app-route.ru..prod.js gzip	25.4 kB	25.4 kB	✓
dist_client_...dev.js gzip	356 B	356 B	✓
dist_client_...dev.js gzip	349 B	349 B	✓
pages-api-tu..prod.js gzip	9.69 kB	9.69 kB	✓
pages-api.ru...dev.js gzip	11.8 kB	11.8 kB	✓
pages-api.ru..prod.js gzip	9.68 kB	9.68 kB	✓
pages-turbo...prod.js gzip	21.9 kB	21.9 kB	✓
pages.runtim...dev.js gzip	31.5 kB	31.5 kB	✓
pages.runtim..prod.js gzip	21.9 kB	21.9 kB	✓
server.runti..prod.js gzip	60.5 kB	60.5 kB	✓
Overall change	1.65 MB	1.67 MB	⚠️ +16.4 kB

build cache Overall increase ⚠️

	vercel/next.js canary	vercel/next.js rf/errors-overlay-polish	Change
0.pack gzip	2.1 MB	2.11 MB	⚠️ +1.36 kB
index.pack gzip	76 kB	75.2 kB	N/A
Overall change	2.1 MB	2.11 MB	⚠️ +1.36 kB

Diff details

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Commit: e83e8e3

[eps1lon]

Until we figure out what's off with the snapshots. Removed blanklines is fine. Showing unsourcemapped stackframes is not.

snapshots were reviewed & only contain whitespace changes