feat: greenfield deployment — no Go required

- install.sh detects if Go is installed
- If Go available: builds from source (current behavior)
- If Go missing: downloads pre-built binary from latest release
- Detects amd64/arm64 architecture automatically
- Same logic applies to -update mode
- Removed hard dependency on ollama.service in systemd unit

install.sh

@@ -69,7 +69,16 @@ if [ "${1:-}" = "-update" ]; then
     fi
 
     info "Rebuilding binary..."
-    CGO_ENABLED=0 go build -ldflags="-s -w" -o receiptnext .
+    if command -v go &>/dev/null; then
+        CGO_ENABLED=0 go build -ldflags="-s -w" -o receiptnext .
+    else
+        warn "Go not found — downloading pre-built binary..."
+        TAG=$(curl -fsSL https://git.lohmar.co.uk/api/v1/repos/cclohmar/ReceiptNext/releases/latest \
+            | python3 -c "import json,sys; print(json.load(sys.stdin).get('tag_name','v1.0.0'))" 2>/dev/null || echo "v1.0.0")
+        ARCH="$(uname -m)"; [ "$ARCH" = "x86_64" ] && ARCH="amd64"; [ "$ARCH" = "aarch64" ] && ARCH="arm64"
+        sudo_if curl -fsSL -o receiptnext "https://git.lohmar.co.uk/cclohmar/ReceiptNext/releases/download/${TAG}/receiptnext-linux-${ARCH}"
+        sudo_if chmod +x receiptnext
+    fi
 
     info "Restarting service..."
     systemctl restart "$SERVICE_NAME"
@@ -103,10 +112,26 @@ else
     cd "$INSTALL_DIR"
 fi
 
-# ── 2. Build binary ──────────────────────────────────────────────
+# ── 2. Build or download binary ──────────────────────────────────
-info "Building binary (pure Go, no CGO)..."
+ARCH="$(uname -m)"
-CGO_ENABLED=0 go build -ldflags="-s -w" -o receiptnext .
+case "$ARCH" in
-info "Binary built: $INSTALL_DIR/receiptnext"
+    x86_64)  ARCH="amd64" ;;
+    aarch64) ARCH="arm64" ;;
+    *)       err "Unsupported architecture: $ARCH"; exit 1 ;;
+esac
+
+if command -v go &>/dev/null; then
+    info "Building binary from source (pure Go, no CGO)..."
+    CGO_ENABLED=0 go build -ldflags="-s -w" -o receiptnext .
+else
+    info "Go not found — downloading pre-built binary..."
+    TAG=$(curl -fsSL https://git.lohmar.co.uk/api/v1/repos/cclohmar/ReceiptNext/releases/latest \
+        | python3 -c "import json,sys; print(json.load(sys.stdin).get('tag_name','v1.0.0'))" 2>/dev/null || echo "v1.0.0")
+    URL="https://git.lohmar.co.uk/cclohmar/ReceiptNext/releases/download/${TAG}/receiptnext-linux-${ARCH}"
+    sudo_if curl -fsSL -o receiptnext "$URL"
+    sudo_if chmod +x receiptnext
+fi
+info "Binary ready: $INSTALL_DIR/receiptnext"
 
 # ── 3. Create runtime directories ────────────────────────────────
 sudo_if mkdir -p storage
@@ -291,8 +316,7 @@ sudo_if tee "/etc/systemd/system/${SERVICE_NAME}.service" > /dev/null << SERVEOF
 [Unit]
 Description=ReceiptNext — AI-Powered Expense Tracker
 Documentation=https://git.lohmar.co.uk/cclohmar/ReceiptNext
-After=network.target ollama.service
+After=network.target
-Wants=ollama.service
 
 [Service]
 Type=simple