docs: establish integrated project memory

.project-docs/30-worklog/current-state.md

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+# Current State
+
+This file is the integrated default-branch snapshot. Feature tasks record progress in `30-worklog/tasks/{task_id}.md` and propose canonical changes for the Integration Gate. Feature tasks must not rewrite this file; it changes only in integration mode.
+
+## Integrated Through
+
+- Source task `20260811-native-display-f2456ea9`, product commit `50ac5bddc4f747b88064051f9038fa026280ab4b`.
+
+## Current Focus
+
+The current focus is field acceptance and production hardening of the native Android display while preserving the existing web, API, and queue invariants.
+
+## Recently Completed
+
+- 2026-08-12: Replaced the Android WebView wrapper with native overview/project Views and direct public API polling.
+- 2026-08-12: Added project-detail-only, three-repeat embedded Mandarin WAV announcements through streaming `AudioTrack`; overview remains silent.
+- 2026-08-12: Added full-range single-line fitting so a batch such as `00010 至 00011` is not clipped, and produced debug APK 1.5.2.
+- 2026-08-12: Retained and verified the responsive browser display adjustments for short landscape screens.
+
+## In Progress
+
+- No product code change is currently in progress on the integrated branch.
+
+## Next Recommended Steps
+
+1. Install debug APK 1.5.2 on the target television and accept representative single/range audio plus full range-number rendering.
+2. Before formal production rollout, build a release-signed APK with the organization's long-lived signing key.
+3. Confirm the legacy WAV asset ownership/redistribution basis before distributing the APK outside the authorized project deployment.
+4. Revalidate landscape behavior before raising Android targetSdk to 37 because the current Android 16 compatibility property is temporary.
+
+## Open Questions / Blockers
+
+- Target-TV audio routing, font metrics, and final range rendering cannot be fully verified by host-side tests.
+- The historical WAV generator, speaker, and separate license record are unknown.
+- The checked-in installable is debug-signed and is not a final production release artifact.
+
+## Risky Areas
+
+- Queue writes and same-session transitions require transaction/row-lock/revision invariants.
+- Public projections must remain free of personal data.
+- Android audio focus, cancellation, and `AudioTrack` lifecycle are vendor-sensitive.
+- Android large-screen orientation behavior changes at targetSdk 37.
+
+## Last Updated
+
+2026-08-12