Show error if js assets fail to load

[myieye]

If assets fail to load then there's just a white page.
Initially I just added this in dev mode, but why not make errors more visible in prod too?

This improvement has been in my stashes for a long time.

[coderabbitai]

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📝 Walkthrough

Walkthrough

Implements conditional asset loading with try-catch in SvelteLayout.razor, adds a nullable string field for errors, renders the error in the UI, and differentiates import behavior for development vs. prebuilt assets. On failure, sets a contextual error message, triggers StateHasChanged, and rethrows.

Changes

Cohort / File(s)	Summary of changes
Svelte layout error handling and asset loading backend/FwLite/FwLiteShared/Layout/SvelteLayout.razor	Added error field and UI rendering of @error; refactored asset import into try-catch with conditional dev vs. prebuilt paths; on exception, set contextual error message, call StateHasChanged, and rethrow; removed previous unconditional import path.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

A rabbit peeked at scripts that load,
Hopped left for dev, right for prod mode.
If imports trip—don’t fear the night—
It sets a note, then brings it to light.
With whiskers twitching, errors shown,
The burrow’s UI feels neatly sewn. 🐰✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title Check	✅ Passed	The title succinctly describes the primary functionality added in the pull request by highlighting the error display for failed JavaScript asset loading, making it clear and specific enough for teammates to understand the main change at a glance.
Description Check	✅ Passed	The pull request description clearly explains the motivation for adding visible error messages when asset loading fails and directly relates to the changes implemented, avoiding any off-topic information.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

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Build	Status	Details	Updated (UTC)
default (Inspect)	✅ No changes detected	-	Oct 8, 2025, 1:11 PM

[github-actions]

UI unit Tests

  1 files   45 suites   29s ⏱️
111 tests 111 ✅ 0 💤 0 ❌
160 runs  160 ✅ 0 💤 0 ❌

Results for commit 2e00b08.

♻️ This comment has been updated with latest results.

[coderabbitai]

Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between ef484ee and f62831e.

📒 Files selected for processing (1)

• backend/FwLite/FwLiteShared/Layout/SvelteLayout.razor (2 hunks)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (3)

• GitHub Check: frontend-component-unit-tests
• GitHub Check: frontend
• GitHub Check: Build FW Lite and run tests

🔇 Additional comments (2)

backend/FwLite/FwLiteShared/Layout/SvelteLayout.razor (2)

39-39: LGTM! Error field and rendering setup looks good.

The nullable error field and its rendering in the UI are appropriate for displaying asset loading failures.

Also applies to: 46-46

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76-84: LGTM! Conditional asset loading logic is correct.

The branching between development and production asset imports is properly implemented with appropriate paths for each environment.