GH#2665: add speech availability gates

[superdav42]

Summary

Added a typed managed-speech availability result, local rollback gate, safe public availability metadata, service metadata projection, and content-free provider trace handling.

Files Changed

includes/Core/Features.php, includes/Core/ProviderTraceLogger.php, includes/Core/PublicChatSecurity.php, includes/Core/SpeechAvailability.php, includes/Core/SuperdavSiteConnectionService.php, includes/REST/SessionController.php, includes/REST/SpeechController.php, src/components/use-text-to-speech.js, tests/SdAiAgent/Core/FeaturesTest.php, tests/SdAiAgent/Core/SpeechAvailabilityTest.php, tests/SdAiAgent/REST/PublicChatControllerTest.php, tests/SdAiAgent/REST/SettingsControllerTest.php, tests/SdAiAgent/REST/SpeechControllerTest.php

Runtime Testing

• Risk level: Critical
• Verification: runtime-verified — runtime-verified: focused WordPress REST integration tests passed (125 tests, 563 assertions); PHP, JS, and CSS lint passed. Browser wp-env startup was blocked by an occupied local port.

Resolves #2665

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aidevops.sh v3.32.306 plugin for OpenCode v1.18.29 with gpt-5.6-terra spent 1h 5m and 694,698 tokens on this as a headless worker.

[superdav42]

Completion Summary

• What: Added a typed managed-speech availability result, local rollback gate, safe public availability metadata, service metadata projection, and content-free provider trace handling.
• Issue: consolidated: Phase 7 speech rollout gates and safe fallback #2665
• Files changed: includes/Core/Features.php, includes/Core/ProviderTraceLogger.php, includes/Core/PublicChatSecurity.php, includes/Core/SpeechAvailability.php, includes/Core/SuperdavSiteConnectionService.php, includes/REST/SessionController.php, includes/REST/SpeechController.php, src/components/use-text-to-speech.js, tests/SdAiAgent/Core/FeaturesTest.php, tests/SdAiAgent/Core/SpeechAvailabilityTest.php, tests/SdAiAgent/REST/PublicChatControllerTest.php, tests/SdAiAgent/REST/SettingsControllerTest.php, tests/SdAiAgent/REST/SpeechControllerTest.php
• Testing: runtime-verified: focused WordPress REST integration tests passed (125 tests, 563 assertions); PHP, JS, and CSS lint passed. Browser wp-env startup was blocked by an occupied local port.
• Key decisions: Browser speech stays opt-in and is used only when managed speech is explicitly unavailable; typed chat remains the failure path.

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aidevops.sh v3.32.306 plugin for OpenCode v1.18.29 with gpt-5.6-terra spent 1h 6m and 694,698 tokens on this as a headless worker.

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Merged via PR #2668 to main.
Merged by deterministic merge pass (pulse-wrapper.sh).

[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between 86ed89b and ad91459.

📒 Files selected for processing (13)

• includes/Core/Features.php
• includes/Core/ProviderTraceLogger.php
• includes/Core/PublicChatSecurity.php
• includes/Core/SpeechAvailability.php
• includes/Core/SuperdavSiteConnectionService.php
• includes/REST/SessionController.php
• includes/REST/SpeechController.php
• src/components/use-text-to-speech.js
• tests/SdAiAgent/Core/FeaturesTest.php
• tests/SdAiAgent/Core/SpeechAvailabilityTest.php
• tests/SdAiAgent/REST/PublicChatControllerTest.php
• tests/SdAiAgent/REST/SettingsControllerTest.php
• tests/SdAiAgent/REST/SpeechControllerTest.php

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