feat: {response,mood} output contract + router removal, TTS piper plan

Daemon side of Decision B: parse {"response","mood"} across the 4 consumers
(replier, nudges, reminders, chat), fall back to legacy formats. Drop the
LLM router — the classifier handles routing; replier/phraser share one
llm.Client (timeout 20s->60s). llm.Client reads reasoning_content when
content is empty (thinking models).

Docs: TTS piper-student plan (OmniVoice teacher -> piper student, from
scratch, phoneme-first). CLAUDE.md training guide.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Dockerfile

@@ -32,6 +32,7 @@ COPY deps/whisper.cpp/ggml/include/ /src/deps/whisper.cpp/ggml/include/
 COPY go.mod go.sum ./
 RUN go mod download
 COPY cmd/ ./cmd/
+# force rebuild 2026-07-10T16:50
 COPY internal/ ./internal/
 
 # CGO wiring mirrors the Makefile; rpath points at the RUNTIME lib location so