Adds /api/costs/tts endpoint backed by get_tts_providers() in cost_db, surfaces a Costs link in the control panel header, and small polish to the costs page HTML/JS. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Adds /api/costs/tts endpoint backed by get_tts_providers() in cost_db, surfaces a Costs link in the control panel header, and small polish to the costs page HTML/JS. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>