Preserve random draws across interview navigation

[Ericko00o]

Preserve an explicit random draw and the candidate's difficulty and duration choices when returning from an unfinished interview through Back, Leave, or Done. Capture the draw ticket and lobby snapshot when Start is pressed so picker changes during an awaited sign-in cannot replace the interview's selection. Reapply the captured choices after native browser form restoration. Clearing a topic filter returns to recommendations while retaining the explicit lobby choices.

Save a tab-local snapshot alongside the draw ticket for fresh lobby entries. Only the latest successfully persisted graded HIRE or NO_HIRE report may end that draw. Beginning a new save invalidates previous completion, so pending, rejected, and failed saves cannot reuse a retained older report. Interview URLs without a ticket cannot claim another draw, and unrelated report deletion or account-history merges retain the selection.

When sessionStorage is unavailable, a ticket-specific same-origin localStorage receipt records the current save outcome and must match the persisted report. Receipts from another tab cannot replace this draw's result. Read-only storage cannot establish a current completion and is treated conservatively. Browser Back uses history state when tab storage is blocked; a fresh lobby entry requires available tab storage to restore the snapshot. If neither completion store is usable, retain the draw instead of inferring success from old history.

Validation: all 237 targeted picker, lobby, draw-completion, and interview-lifecycle tests passed without failures or skips. The login-race and newer-failed-save cases failed before the fixes and passed afterward. Formatting, ESLint, commit-message validation, staged checks, and all 49 Git hooks checks passed. The full browser suite reported 1192 passed, 5 failed, and 3 skipped. The required scripts/test.sh gate was run but did not pass: Cargo was unavailable; wire-fixtures and recording-provision-check-tests encountered existing Windows limitations; the five browser failures were four Windows ESM path cases and one unavailable-server face check. Java and two built-server browser cases were skipped, and cargo-audit, actionlint, ruff, and shellcheck were unavailable.

Rebased onto main at 8394d54. This PR contains one navigation commit and preserves upstream source-display, interview retry settings, and voice controls.

[jserv]

@Ericko00o #256 merged on 2026-10-11, so the prerequisite this draft waits on is in main. Rebase onto main so only the navigation commit remains, then mark the pull request ready for review as your description plans. It and #285 (Strict mode) both edit web/app.js and web/interview.js, so expect a conflict whichever lands second.

[jserv]

Rebase latest main branch and resolve conflicts.