Merge origin/main into rust-swap (#716 orphaned-session fix)

Restores tests/live-browser-source.test.mjs from main: the page JS it
pins is unchanged by the engine swap and the file passes as-is.

Co-Authored-By: Claude Code <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vau2X53xGTjjTCXWMVBoNY

scripts/test-suites.mjs

@@ -122,6 +122,7 @@ export const SUITES = {
         files: [
           'tests/live-reference.test.mjs',
           'tests/live-browser-ignores.test.mjs',
+          'tests/live-browser-source.test.mjs',
           'tests/live-e2e-agent-output.test.mjs',
           'tests/live-e2e-cli-options.test.mjs',
           'tests/live-e2e-llm-agent.test.mjs',