ROOT CAUSE (Zen Debug Investigation):
The API_BASE_URL constant was being evaluated when the module loaded,
BEFORE window.env was populated by env-config.js. This caused the app
to permanently use the fallback localhost:3001 instead of reading the
production URL from the .env file.
TIMING ISSUE:
1. Browser loads index.html
2. env-config.js loads (creates window.env)
3. main.tsx loads as ES module (DEFERRED)
4. Module imports checkoutClient → const API_BASE_URL executes
5. window.env NOT READY YET → falls back to localhost:3001
6. API_BASE_URL locked to wrong value forever
THE FIX:
Changed from module-level constants to request-time lazy evaluation.
Now getApiBaseUrl() is called WHEN THE API REQUEST HAPPENS, not when
the module loads. At that point window.env is guaranteed to exist.
FILES CHANGED:
- src/api/checkoutClient.ts:
* Removed constant API_BASE_URL
* All 3 functions now call getApiBaseUrl() at request time
* Added logging to show which URL is being used
- src/api/aisClient.ts:
* Removed constant API_KEY
* Added getApiKey() function with lazy evaluation
* Same pattern for consistency and future-proofing
This fixes: "FetchEvent for http://localhost:3001 resulted in network error"
Now uses: https://puffinoffset.com/api (from .env file)
🔒 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
