🧪 Test: Add coverage for loadTemplates in MockingTemplateLoader

[RoiSoleil]

🎯 What: The testing gap in MockingTemplateLoader.loadTemplates() where complete scenarios (like loading both bundle and workspace resources simultaneously) and specific side-effects (like clearing the store) were untested.
📊 Coverage: Now explicitly tests that templateStore.clear() is called and that loading successfully integrates template sources from both plugin bundles and user workspace configurations into the store.
✨ Result: Enhanced test coverage providing a robust safety net for the core template loading logic, verifying the intended side effects and control flow comprehensively.

---

PR created automatically by Jules for task 6687245177623239144 started by @RoiSoleil

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.59%. Comparing base (000aa0b) to head (27b5098).
⚠️ Report is 12 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #268      +/-   ##
============================================
+ Coverage     73.49%   73.59%   +0.09%     
- Complexity     3254     3259       +5     
============================================
  Files           422      422              
  Lines         14520    14567      +47     
  Branches       1271     1271              
============================================
+ Hits          10672    10720      +48     
+ Misses         3309     3307       -2     
- Partials        539      540       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.