fix(configurator): preserve editor input and latest saved list

[lweberru]

Release blocker and proven causes

Release 38969098107 passed the complete exact-source real-model gate (114/114 plus dialogue 13/13) but its full browser build gate failed: a saved configuration retained its old name (307/308 cases passed). The failed run remains failed; it is not promotable.

Instrumented synthetic focus/input traces showed that the first session lookup replaced the entire keyed catalogue/editor subtree while a textbox was focused, before its first input event. A delayed-session regression then deterministically failed focused-node identity on both viewports. Investigation also proved that an older initial list response could overwrite a successful post-save refresh; its delayed-response regression failed on both viewports.

Fix

• Use the existing identity-change reset boundary to advance a workspace epoch and remount scoped catalogues only on actual identity/workspace changes, not the first guest-to-known-session lookup. Logout and cross-tenant resets remain intact.
• Bind list responses/errors to the latest request and capture each refresh abort signal.
• Extend the existing save/reopen/revision-conflict/delete journey with controlled delayed session and initial-list responses, exact DOM identity and typed-value checks. No retries, larger timeouts or weaker assertions.
• Document the ordering/reset invariants for contributors.

Validation

• Pinned Node 24.21.0 / npm 11.19.0; npm run check passed: static knowledge freshness, lint, type-check, build; 809 unit tests passed, 66 environment-dependent tests skipped.
• Deterministic affected desktop/mobile journey: 40/40 passed (20 repetitions each, not model repetitions).
• Complete Playwright suite: 308/308 passed.
• Before-fix deterministic failures retained as evidence; temporary instrumentation removed.
• git diff --check passed. No Assistant facts/oracles/capabilities changed and no customer Apply/cloud mutation performed.

The normal full manual release still has to qualify and build the exact merged source before activation.