v2026.4.25-beta.4

## 2026.4.25 ### Highlights - Voice replies get a full TTS upgrade: `/tts latest`, chat-scoped auto-TTS controls, personas, per-agent/per-account overrides, and new Azure Speech, Xiaomi, Local CLI, Inworld, Volcengine, and ElevenLabs v3 provider coverage. Thanks @leonchui, @zoujiejun, @solar2ain, @cshape, @xuruiray, @itsuzef, and @barronlroth. - Plugin startup and install paths move to the cold persisted registry, cutting broad manifest scans while making plugin update, repair, provider discovery, and install metadata more deterministic. Thanks @vincentkoc and @shakkernerd. - OpenTelemetry coverage expands across model calls, token usage, tool loops, harness runs, exec processes, outbound delivery, context assembly, and memory pressure with bounded low-cardinality attributes. Thanks @vincentkoc, @jlapenna, @Lidang-Jiang, and @oc-factus. - Browser automation gets safer tab URLs, iframe-aware role snapshots, CDP readiness tuning, headless one-shot launch, and deeper browser doctor probes for slow hosts. Thanks @beat843796 and @BenediktSchackenberg. - Control UI and setup flows add PWA/Web Push support, Crestodian first-run repair, TUI setup, context mode selection, and a shorter startup greeting. Thanks @eduardocruz, @SebTardif, and @kevinlin-openai. - Install/update hardening covers Windows, macOS, Linux, Docker, bundled plugin runtime deps, Node service restarts, LaunchAgent token rotation, and mixed-version gateway verification. Thanks @Kobevictor, @igormf, @abhinas90, @jsompis, @Solvely-Colin, and @gucasbrg. ### Changes - TTS/WhatsApp: add `/tts latest` read-aloud support with duplicate suppression and `/tts chat on|off|default` session-scoped auto-TTS overrides, completing the on-demand voice-note UX for current-chat replies. Fixes #66032. - TTS/channels: resolve channel and account TTS overrides generically, enabling Feishu and QQBot accounts to deep-merge `channels.<channel>.accounts.<id>.tts` over global and per-agent TTS config. Thanks @sahilsatralkar. -