openworlds: add stable accessibility and agent-driving hooks

[100yenadmin]

Summary

Add stable accessibility labels and data-worldos-testid hooks so agents and Playwright can drive WorldOS by UI contract instead of pixel coordinates or text fragments.

Required hook coverage

• Primary navigation and screen tabs
• Provider selector and start/resume controls
• Action palette buttons
• Chat/move input and submit affordance
• Modal close buttons
• Active actor/chosen hero display
• Error banners and provider status banners

Acceptance criteria

• No visible text is added solely for tests.
• Hooks are stable across visual copy changes.
• The Playwright palette can prefer role/name/testid over coordinate clicks.
• Keyboard path works for the same core controls where applicable.
• Static tests or DOM snapshot tests prove key controls expose ARIA labels/test IDs.

[100yenadmin]

Stable UI hook draft is up in #492, stacked on #488. It adds ARIA/test hooks for primary navigation, tabs, launcher start/resume, campaign rows, table action palette, active player, move composer, provider controls, toasts, and modal close buttons.

[100yenadmin]

PR #495 is the recovered stable-UI-hooks slice on current main. Current head is 698ed65 with built-app evidence at /Volumes/LEXAR/Codex/worldos-built-app-playtest/ui-hooks-app-proof-20260601T054934: launched dist/WorldOS.app, provider scripted, private-art root present, live campaign camp_c44d76054d36, actor Abby, enabled actions, writable /move, deterministic narration after a real move, and real image probe bytes. Keeping this issue open until #495 merges.

[100yenadmin]

PR #495 current head ed0a328 resolves the first-turn hook ambiguity found during review: primary banner keeps unique chronicle-resume; card CTA is chronicle-resume-detail; start-flow and create-submit are split; session-surface status no longer uses an app-status hook name. Focused validation stayed green: viewer static hooks and macOS app static tests. Keeping this issue open until #495 merges.

[100yenadmin]

Closed by PR #495, merged as 1e148ab. Evidence: /Volumes/LEXAR/Codex/worldos-built-app-playtest/ui-hooks-app-proof-20260601T054934 plus current-head static validation after unambiguous hook/accessibility cleanup. This lands stable OpenWorlds ARIA/data-worldos-testid hooks for first-turn agent driving; release gate still remains stabilization until #466 is rerun cleanly.

[100yenadmin]

Fresh-main #497 keeps the merged #495 hook surface and adds the requested app-status-banner status hook. Focused static coverage passed in viewer/tests/test_openworlds_static.py. Leaving open until #497 merges and the main implementation agent approves.