fix(prd-1): inline GITHUB_SERVER_URL export in CI test step

Forgejo runner re-injects GITHUB_SERVER_URL after step-level env is
set, so the env: key approach doesn't override it. Using inline export
in the run command ensures the override takes effect before bun loads
modules (config.ts module-level constants read process.env at import).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.forgejo/workflows/ci.yml

@@ -35,13 +35,15 @@ jobs:
         run: bun install
 
       - name: Run tests
-        run: bun test
-        env:
-          # Unit tests assume GitHub context. Override Forgejo runner's
-          # GITHUB_SERVER_URL so module-level constants (config.ts) and
-          # detectPlatform() default to GitHub. Forgejo-specific tests
-          # explicitly set PLATFORM=forgejo in their own beforeEach.
-          GITHUB_SERVER_URL: https://github.com
+        # Unit tests assume GitHub context. Override Forgejo runner's
+        # GITHUB_SERVER_URL so module-level constants (config.ts) and
+        # detectPlatform() default to GitHub. Forgejo-specific tests
+        # explicitly set PLATFORM=forgejo in their own beforeEach.
+        # Inline export because Forgejo runner re-injects GITHUB_SERVER_URL
+        # after step-level env:, overriding it.
+        run: |
+          export GITHUB_SERVER_URL=https://github.com
+          bun test
 
   prettier:
     runs-on: grunt