refactor: strengthen createSession URL assertion

[empiricalrun]

Summary

Identified that createSession() in tests/pages/sessions.ts had a loose URL check (/sessions/) after clicking "Create". This caused 9 test files to repeat a more specific URL assertion (/sessions/[^\/]+/) right after every createSession() call — a clear duplication.

Change (1 helper modification)

Updated createSession in tests/pages/sessions.ts to wait for the precise session detail URL:

// Before
await expect(page).toHaveURL(/sessions/);

// After
await expect(page).toHaveURL(/sessions\/[^\/]+/);

Cleanup (redundant assertions removed)

Removed the now-redundant follow-up URL checks from:

• tests/tool-execution/session.spec.ts — 8 occurrences
• tests/rename-file-tool.spec.ts — 1 occurrence

The 2 remaining toHaveURL(/sessions\/[^\/]+/) calls in tool-execution/session.spec.ts (line 160) and issues.spec.ts (line 148) are kept intentionally — they belong to custom session creation flows that don't use createSession().

Test Results

✅ Verified with a passing test run: https://reports-r2.empirical.run/test-gen-chat-agent/1776401978258/index.html

PR created from session #120971

^{Updated at 2026-04-17 05:01:03.475 UTC}