Remove ts-strict-ignore from fido2 page

[jholland-livefront]

🎟️ Tracking

PM-29511

📔 Objective

Remove ts-strict-ignore and update types for fido2-page-script.ts.

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[github-actions]

Checkmarx One – Scan Summary & Details – 9ece1641-cd9b-482f-99f3-9013cedfd74e

Great job! No new security vulnerabilities introduced in this pull request

[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 42.25%. Comparing base (cf1c322) to head (1848484).
⚠️ Report is 5 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...er/src/autofill/fido2/content/fido2-page-script.ts	29.41%	5 Missing and 7 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #18146      +/-   ##
==========================================
+ Coverage   42.24%   42.25%   +0.01%     
==========================================
  Files        3598     3599       +1     
  Lines      104474   104522      +48     
  Branches    15763    15782      +19     
==========================================
+ Hits        44135    44169      +34     
- Misses      58461    58465       +4     
- Partials     1878     1888      +10     

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[dan-livefront]

instead of a non null assertion here we can do an explicit null check

Suggested change

	globalContext.top!.addEventListener("focus", focusListenerHandler);
	const topWindow = globalContext.top;
	const focusPromise = new Promise<void>((resolve) => {
	focusListenerHandler = () => resolve();
	if (topWindow) {
	topWindow.addEventListener("focus", focusListenerHandler);
	}
	});

[bw-ghapp]

Changes in this PR impact the Autofill experience of the browser client

BIT has tested the core experience with these changes and the feature flag configuration used by vault.bitwarden.com.

✅ Fortunately, these BIT tests have passed! 🎉

[bw-ghapp]

Changes in this PR impact the Autofill experience of the browser client

BIT has tested the core experience with these changes and all feature flags disabled.

✅ Fortunately, these BIT tests have passed! 🎉