[CL-485] Add small delay for async action loading state

[vleague2]

🎟️ Tracking

CL-485

📔 Objective

This PR adds a small delay to the display of the loading spinner for standalone async actions. This helps minimize the "flash" of the loading spinner for quick-resolving actions that don't need to display a spinner. For example, this will improve the back button experience in the extension.

📸 Screenshots

Extension back button as an example:

Screen.Recording.2025-01-13.at.11.58.04.AM.mov

⏰ 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 – 1fc663a0-7782-4826-ae6e-f59e04a362b7

New Issues (3)

Checkmarx found the following issues in this Pull Request

Severity	Issue	Source File / Package	Checkmarx Insight
	CVE-2024-12381	Npm-electron-33.2.1	Vulnerable Package
	CVE-2024-11110	Npm-electron-33.2.1	Vulnerable Package
	CVE-2024-11117	Npm-electron-33.2.1	Vulnerable Package

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 24 lines in your changes missing coverage. Please review.

Project coverage is 34.27%. Comparing base (52b6bfe) to head (7c4f725).
Report is 24 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...components/src/async-actions/standalone.stories.ts	0.00%	16 Missing ⚠️
...mponents/src/async-actions/bit-action.directive.ts	0.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12835      +/-   ##
==========================================
- Coverage   34.28%   34.27%   -0.02%     
==========================================
  Files        2933     2934       +1     
  Lines       90065    90238     +173     
  Branches    16912    16945      +33     
==========================================
+ Hits        30880    30930      +50     
- Misses      56727    56844     +117     
- Partials     2458     2464       +6     

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[vleague2]

@danielleflinn Curious to hear your thoughts on the delay timing that has been added -- you can play with it in Storybook's async actions stories

[danielleflinn]

Screen recording looks so smooth! 😍