feat!: v3.0.0 .storage-native zero-reboot Google Assistant architecture

[spelech]

Summary

Upgrades Google Assistant Entity Console to v3.0.0 (major release), replacing the YAML generation + Home Assistant reboot workflow with a 100% .storage-native, zero-reboot live sync architecture.

Key Changes

1. 100% .storage Persistence (store.py):
   • Stores google_settings (project_id, service_account (client_email, private_key), report_state, secure_devices_pin, auto_sync), synced_entities, blocklist, and ai_settings inside .storage/google_assistant_entity_console via homeassistant.helpers.storage.Store.
   • Automatically imports legacy credentials and exposed entity configurations from configuration.yaml, secrets.yaml, gaGen_*.yaml, SERVICE_ACCOUNT.json, .google_assistant_blocklist.json, and .google_assistant_ai_settings.json on first run.
2. Zero-Reboot Runtime Manager (runtime.py):
   • Attaches to an existing google_assistant config entry (yaml_attached mode) or bootstraps GoogleConfig + GoogleAssistantView (/api/google_assistant) directly from .storage (storage mode) without requiring google_assistant: in configuration.yaml.
   • Mutates google_config._config["entity_config"] in memory on every entity exposure, nickname, or friendly-name update.
   • Calls await google_config.async_sync_entities_all() (devices:requestSync to Google HomeGraph) on Sync to Google (or via optional 15s debounced async_schedule_google_sync_all()) with zero Home Assistant restarts.
   • Safely removes stale SOURCE_IMPORT google_assistant config entries when switching to standalone .storage mode so Home Assistant boots cleanly after google_assistant: is removed from configuration.yaml.
3. Backend API & UI (views.py, static/index.html, static/app.js):
   • Added /api/google_assistant_entity_console/sync, /api/google_assistant_entity_console/google_settings, and /api/google_assistant_entity_console/migrate_yaml.
   • Replaced header Sync & Rebuild + restart modal workflow with live Sync to Google.
   • Added Google Assistant Connection (.storage) credentials & Migrate from YAML controls to the Settings modal.

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Visual Screenshots

v3.0.0 .storage Live Sync Dashboard

v3.0.0 .storage Google Assistant & AI Settings Modal

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Verification

• Unit & E2E Tests: 359 passed (test_store.py, test_runtime.py, test_views.py, test_blocklist.py, test_entities.py, test_yaml.py, test_config_flow.py, test_playwright_e2e.py).
• Linter: ruff check . passed with 0 errors.
• Live Home Assistant Container Verification: Verified store.py, runtime.py, and views.py against the running homeassistant container (GoogleConfig, GoogleAssistantView, Store, and live /config YAML/secrets/service-account extraction).