fix persisted bun lockfile recovery

[harsh21234i]

What changed

• Detect when bun install --frozen-lockfile fails because the recovered package.json and persisted bun.lock are
  out of sync.
• Automatically retry the install without --frozen-lockfile so Bun can reconcile the files.
• Preserve the existing error behavior for unrelated installation failures.
• Add regression coverage for the recovery flow.

Why

A persisted bun.lock could contain updated dependencies while the persisted package.json remained stale. This
caused reflex run to fail and required users to manually delete reflex.lock.

The new recovery flow regenerates the mismatched lockfile automatically, allowing the application to start normally.

Fixes #6657

Validation

• uv run pytest tests/units/test_prerequisites.py -q
• uv run ruff check reflex/utils/js_runtimes.py tests/units/test_prerequisites.py
• git diff --check

[greptile-apps]

Greptile Summary

This PR changes _run_initial_install so that a bun --frozen-lockfile mismatch triggers an automatic retry without the flag, instead of immediately failing with a manual-delete hint. Two tests cover the new happy path and failure path.

• The retry logic and detection guard (_is_bun_package_manager) are correct, and the failure-path message now includes the directory hint the user needs.
• The show_status call for the recovery process is missing suppress_errors=True: stream_logs raises SystemExit(1) internally when the recovery exits non-zero, so the custom "Failed to regenerate" message and the directory-deletion hint are unreachable dead code in production. The new test masks this by mocking show_status to return a list rather than raise.

Confidence Score: 4/5

Safe to merge with one fix: the recovery show_status call needs suppress_errors=True or the actionable error message will never reach the user when recovery fails.

The retry logic is correct and the happy path works. When recovery fails, show_status raises SystemExit(1) internally before the custom error block runs, so the user-facing directory-deletion hint is never shown.

reflex/utils/js_runtimes.py — the show_status call in the recovery block (line 518) and the corresponding test mock in test_prerequisites.py

Important Files Changed

Filename	Overview
reflex/utils/js_runtimes.py	Adds retry-without-frozen-lockfile recovery for bun lockfile mismatch; the recovery's show_status call omits suppress_errors=True, making the actionable error message unreachable when recovery fails
tests/units/test_prerequisites.py	Adds two new tests for the recovery flow (happy path and failure path); the failure-path test passes because its show_status mock returns a list rather than raising, masking the production bug

_{Reviews (3): Last reviewed commit: "Merge branch 'reflex-dev:main' into fix/..." | Re-trigger Greptile}

[harsh21234i]

hey @masenf can you look into this?