ci: show vite server logs only on failure

[kitsuyui]

Summary

Fix the CI EXIT trap in test.yml and octocov.yml so that the vite server log is only shown when the workflow fails, not on every run.

Problem

Both workflows had this trap:

trap 'kill $vite_pid; cat /tmp/gitignore-in-website-vite.log' EXIT

The cat runs unconditionally — on success and failure alike. Diagnostic logs should help debug failures, not appear as noise when tests pass. On a successful run, the vite log output adds clutter without value.

Change

Split the log display into a separate step using GitHub Actions' if: failure():

- name: E2E Test
  run: |
    ...
    trap 'kill $vite_pid' EXIT   # cleanup only
    ...

- name: Show vite server logs
  if: failure()
  run: cat /tmp/gitignore-in-website-vite.log

This is the idiomatic GitHub Actions pattern for failure-only diagnostics. The trap now only handles cleanup; the log display is conditional.

Applied the same fix to both test.yml (E2E Test step) and octocov.yml (Test with coverage step), which had the identical pattern.

Verification

• On success: vite server is killed by the trap; log step is skipped.
• On failure: vite server is killed by the trap; log step runs and displays the vite output for debugging.

[github-actions]

Code Metrics Report

	main (2c70363)	#899 (208a25c)	+/-
Coverage	0.0%	0.0%	0.0%
Code to Test Ratio	1:0.6	1:0.6	0.0
Test Execution Time	18s	1s	-17s

Details

  |                     | main (2c70363) | #899 (208a25c) | +/-  |
  |---------------------|----------------|----------------|------|
  | Coverage            |           0.0% |           0.0% | 0.0% |
  |   Files             |              0 |              0 |    0 |
  |   Lines             |              0 |              0 |    0 |
  |   Covered           |              0 |              0 |    0 |
  | Code to Test Ratio  |          1:0.6 |          1:0.6 |  0.0 |
  |   Code              |             19 |             19 |    0 |
  |   Test              |             13 |             13 |    0 |
+ | Test Execution Time |            18s |             1s | -17s |

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Reported by octocov