fix: Fix test mocking by deferring env var access

[z-Fng]

Changes

• Move VITE_APP_AZURESEARCH_* from module level to function body.
• Allows vi.stubEnv() to properly override environment variables in tests.
• Resolves timing issue where GitHub Actions empty string env prevented mocking.

Summary by CodeRabbit

• Refactor
  • Optimized environment variable retrieval timing for improved request handling.

[coderabbitai]

Walkthrough

Environment variable reads for Azure Search configuration were relocated from module initialization scope into the fetchDataAsync function body. This changes the timing of when these values are retrieved from module load time to request execution time, while maintaining identical validation and usage patterns.

Changes

Cohort / File(s)	Summary
Lazy environment variable initialization src/components/SearchProcessor.tsx	Moved VITE_APP_AZURESEARCH_URL and VITE_APP_AZURESEARCH_KEY environment variable destructuring from module scope into fetchDataAsync function body to defer resolution until request execution time.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A rabbit's ode to timely delays
Variables once eager, now wise—
They wait for the moment, the perfect request,
No longer rushing at module sunrise,
Patient and poised, they find their best!

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'fix: Fix test mocking by deferring env var access' accurately describes the main change: moving environment variable access from module scope to function scope to enable proper test mocking.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

📝 Coding Plan

• Generate coding plan for human review comments

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