Strict null checks exclude 4

[grahamlangford]

What does this PR do?

• More strict null check fixes

Checklist

• Designate a primary reviewer @BLoe

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 73.41%. Comparing base (6d95047) to head (9503907).
Report is 36 commits behind head on main.

Files	Patch %	Lines
src/pageScript/pageScript.ts	0.00%	5 Missing ⚠️
src/tinyPages/frame.ts	0.00%	2 Missing ⚠️
...r/tabs/editTab/editorNodes/brickNode/BrickNode.tsx	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8430      +/-   ##
==========================================
- Coverage   73.47%   73.41%   -0.07%     
==========================================
  Files        1334     1352      +18     
  Lines       41259    41521     +262     
  Branches     7686     7777      +91     
==========================================
+ Hits        30316    30483     +167     
- Misses      10943    11038      +95     

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[github-actions]

Playwright test results - MV2

 37 passed
 5 flaky
 8 skipped

Details

 Open report ↗︎
 50 tests across 18 suites
 11 minutes, 28 seconds
 9503907

Flaky tests

edgeSetup › auth.setup.ts › authenticate
chrome › tests/extensionConsoleActivation.spec.ts › can activate a mod with a database
edge › tests/extensionConsoleActivation.spec.ts › can activate a mod with a database
chrome › tests/pageEditor/saveMod.spec.ts › can save a standalone trigger mod
edge › tests/pageEditor/saveMod.spec.ts › can save a standalone trigger mod

Skipped tests

chrome › tests/extensionConsoleActivation.spec.ts › can activate a mod with built-in integration
edge › tests/extensionConsoleActivation.spec.ts › can activate a mod with built-in integration
chrome › tests/runtime/sidebarController.spec.ts › sidebar controller › shows focus dialog in top-level frame
edge › tests/runtime/sidebarController.spec.ts › sidebar controller › shows focus dialog in top-level frame
chrome › tests/runtime/sidebarNavigation.spec.ts › sidebar mod panels are persistent during navigation
chrome › tests/runtime/sidebarNavigation.spec.ts › sidebar form and temporary panels are unavailable after navigation
edge › tests/runtime/sidebarNavigation.spec.ts › sidebar mod panels are persistent during navigation
edge › tests/runtime/sidebarNavigation.spec.ts › sidebar form and temporary panels are unavailable after navigation

[github-actions]

Playwright test results - MV3

 48 passed
 2 flaky

Details

 Open report ↗︎
 50 tests across 18 suites
 14 minutes, 42 seconds
 9503907

Flaky tests

chrome › tests/regressions/doNotCloseSidebarOnPageEditorSave.spec.ts › #8104: Do not automatically close the sidebar when saving in the Page Editor
edge › tests/regressions/doNotCloseSidebarOnPageEditorSave.spec.ts › #8104: Do not automatically close the sidebar when saving in the Page Editor

[github-actions]

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