What

• Adds low-latency StickS3/FunASR streaming and stable segment/tail correction.
• Adds the Windows input-relay protocol for local and RDP-focused text input.
• Adds server-side Sub2-Usage snapshots for Codex/Claude quota and account names.
• Restores front-button Send/Enter plus task completion, approval, and error sounds.
• Adds BMI270 pickup/flip display behavior and true PMIC-aware idle shutdown.
• Adds Unraid deployment assets, Windows setup helpers, release notes, and regression tests.

Why

The original record-then-upload path made long voice input feel slow and could leave the UI stuck in the listening state. Provisional/final transcript replacement could also delete or duplicate already-entered text. The original power path left peripheral LDO holds enabled, so a dark screen could still drain the battery. Quota and task state also depended too heavily on a local desktop bridge.

Impact

StickS3 now streams audio while the button is held, exits listening promptly on release, and only corrects the active tail. A server-hosted Bridge can relay results to Windows, fetch normalized quota snapshots without exposing credentials to firmware, and forward task alerts. Idle battery operation now shuts down peripheral rails before PMIC power-off, with deep sleep as a fallback.

The companion Windows GUI is maintained separately; this PR contains its Bridge-side protocol and tests.

Checks

• PYTHONPATH=bridge/src python -m pytest -q tests: 90 passed.
• PlatformIO ESP-IDF build from the exact staged tree: success.
• Firmware size: RAM 26.6%, application Flash 65.8%.
• Staged secret scan: no real API tokens, Wi-Fi passwords, or ASR keys.
• Hardware smoke-tested on M5Stack StickS3 for streaming, release handling, quota/account display, Enter, alert sounds, IMU wake, and PMIC shutdown.

Detailed release and rollback record: docs/releases/0.1.6.md.