Make make test actually gate on gofmt and vet

DESIGN.md has always said `make test` is "gofmt + vet + -race, no
exceptions". It only ever ran the tests, which is how nine files drifted
out of format without anyone noticing.

`test` now depends on `fmt-check` and `vet`. Checked that fmt-check does
fail when a file is unformatted, so the gate is real and not decorative.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CGeSZxh1DCtRxmFVSYVGvJ

Makefile

@@ -16,7 +16,7 @@ PIPER_BIN     := $(shell pwd)/deps/piper/piper
 PIPER_MODEL   := $(shell pwd)/models/tts/ru_RU-irina-medium.onnx
 PIPER_ESPEAK  := $(shell pwd)/deps/piper/espeak-ng-data
 
-.PHONY: all build build-stt build-tts build-daemon build-client build-waked build-web build-poll build-caldav clean test run-stt run-tts run-web download-embedder deps-go eval-router eval-recall
+.PHONY: all build build-stt build-tts build-daemon build-client build-waked build-web build-poll build-caldav clean test fmt-check vet run-stt run-tts run-web download-embedder deps-go eval-router eval-recall
 
 all: build
 
@@ -69,7 +69,20 @@ deps-go:
 	done
 	$(GO) version
 
-test:
+# fmt-check fails if any file needs gofmt. DESIGN.md has always said `make
+# test` gates on gofmt and vet; it did not, so nine files quietly drifted.
+# Run `gofmt -w` on whatever this prints.
+fmt-check:
+	@bad=$$(gofmt -l internal cmd); \
+	if [ -n "$$bad" ]; then \
+		echo "these files need gofmt:"; echo "$$bad"; exit 1; \
+	fi
+
+vet:
+	CGO_CFLAGS="$(CGO_CFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" LD_LIBRARY_PATH="$(shell pwd)/deps/lib" \
+		$(GO) vet ./internal/... ./cmd/...
+
+test: fmt-check vet
 	CGO_CFLAGS="$(CGO_CFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" LD_LIBRARY_PATH="$(shell pwd)/deps/lib" \
 		$(GO) test -race -coverprofile=coverage.out ./internal/... ./cmd/...