The run configures the mock provider through the CLI path, which writes
OPENAI_BASE_URL/OPENAI_API_KEY into .env. tests/install/e2e-assets/desktop-smoke.ts
then calls writeEnvFile(home) with NO url -- and that call filtered the portable
pair out of the file while writing only MOCK_API_KEY. So the user-state snapshot
recorded .env without the endpoint, the upgrade's own post-update .env sync added
it back, and the leg failed as "the upgrade changed the user's own state ... 0
deleted, 1 modified" with the pair reported as ADDITIONS (before: 26403 bytes with
MOCK_API_KEY; after: 26473 bytes with the pair).
Only keys this call actually replaces are dropped now: without a mockUrl the
MOCK_API_KEY line is still rewritten and the portable pair is left untouched.
Proven red on base by the new case (writeEnvFile(home) left
'\nMOCK_API_KEY=e2e-mock-key\n', endpoint gone) and green with the fix.
tests-js/scripts/desktop-smoke.test.ts: 11 passed | 3 skipped.
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