rename binary from fetch to akai-fetch

Consistent with go.mod, usage strings, and docs.
Updated Dockerfile, electron config, and Makefile.

Dockerfile

@@ -9,13 +9,13 @@ COPY third_party/akaiutil/ /src/akaiutil/
 WORKDIR /src/akaiutil
 RUN make
 
-# Stage 2: Build fetch (Go tool)
-FROM golang:1.26-alpine AS fetch-builder
+# Stage 2: Build akai-fetch (Go tool)
+FROM golang:1.26-alpine AS akai-fetch-builder
 
 WORKDIR /src
-COPY go.mod main.go serve.go /src/
+COPY go.mod *.go /src/
 COPY web/ /src/web/
-RUN CGO_ENABLED=0 go build -o /fetch .
+RUN CGO_ENABLED=0 go build -o /akai-fetch .
 
 # Stage 3: Runtime image
 FROM debian:11-slim
@@ -28,10 +28,10 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 RUN mkdir -p /data/output/isos /data/output/wavs
 
 COPY --from=akaiutil-builder /src/akaiutil/akaiutil /usr/local/bin/
-COPY --from=fetch-builder /fetch /usr/local/bin/fetch
+COPY --from=akai-fetch-builder /akai-fetch /usr/local/bin/akai-fetch
 COPY scripts/extract_wavs.sh /usr/local/bin/
 
 WORKDIR /data
 EXPOSE 8080
-ENTRYPOINT ["fetch"]
+ENTRYPOINT ["akai-fetch"]
 CMD ["serve", "-p", "8080", "--host", "0.0.0.0"]