NAS-134194 / 25.10 / More strict null fixes

[undsoft]

Testing:

Code review and shallow testing.

[bugclerk]

Jira URL: https://ixsystems.atlassian.net/browse/NAS-134194

[codecov]

Codecov Report

Attention: Patch coverage is 72.80702% with 31 lines in your changes missing coverage. Please review.

Project coverage is 83.30%. Comparing base (2a701fc) to head (63f9ec1).
Report is 2 commits behind head on master.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...omponents/ix-code-editor/ix-code-editor.harness.ts	9.09%	10 Missing ⚠️
...pages/system/enclosure/services/enclosure.store.ts	33.33%	4 Missing ⚠️
...dules/alerts/components/alert/alert.page-object.ts	75.00%	2 Missing ⚠️
...omponents/alerts-panel/alerts-panel.page-object.ts	75.00%	2 Missing ⚠️
...s/forms/toolbar-slider/toolbar-slider.component.ts	0.00%	2 Missing ⚠️
src/app/pages/apps/resolvers/app-name.resolver.ts	0.00%	2 Missing ⚠️
...g/mock-enclosure/mock-enclosure-generator.utils.ts	0.00%	1 Missing ⚠️
src/app/directives/ui-search.directive.ts	66.66%	1 Missing ⚠️
.../app/modules/feedback/services/feedback.service.ts	66.66%	1 Missing ⚠️
...ms/components/ix-combobox/ix-combobox.component.ts	0.00%	1 Missing ⚠️
... and 5 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #11556      +/-   ##
==========================================
+ Coverage   83.28%   83.30%   +0.02%     
==========================================
  Files        1654     1654              
  Lines       59100    59135      +35     
  Branches     6354     6381      +27     
==========================================
+ Hits        49219    49261      +42     
+ Misses       9881     9874       -7     

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[AlexKarpov98]

Looks & works fine 👌