Upgrade dashboard, builder, and agent resource controls.

Dark UI with hashrate graphs, inline setting help, percent-based threads/RAM, configurable process name and display modes, and LAN-aware run.bat startup banner.

server/internal/builder/handler_test.go

@@ -0,0 +1,48 @@
+package builder
+
+import "testing"
+
+func TestNormalizeRequestDefaults(t *testing.T) {
+	h := &Handler{}
+	req := &BuildRequest{
+		WorkerName: "pc-1",
+		ServerURL:  "http://192.168.1.10:8989",
+		Wallet:     "48abc",
+	}
+	if err := h.normalizeRequest(req); err != nil {
+		t.Fatal(err)
+	}
+	if req.ThreadMode != "percent" {
+		t.Fatalf("expected percent thread mode, got %s", req.ThreadMode)
+	}
+	if req.ThreadPercent != 75 {
+		t.Fatalf("expected 75%%, got %d", req.ThreadPercent)
+	}
+	if req.ProcessName == "" {
+		t.Fatal("expected generated process name")
+	}
+}
+
+func TestNormalizeRequestRequiresWallet(t *testing.T) {
+	h := &Handler{}
+	req := &BuildRequest{WorkerName: "pc", ServerURL: "http://x"}
+	if err := h.normalizeRequest(req); err == nil {
+		t.Fatal("expected wallet validation error")
+	}
+}
+
+func TestNormalizeRequestPersistence(t *testing.T) {
+	h := &Handler{}
+	req := &BuildRequest{
+		WorkerName: "pc-1",
+		ServerURL:  "http://192.168.1.10:8989",
+		Wallet:     "48abc",
+		Persistence: true,
+	}
+	if err := h.normalizeRequest(req); err != nil {
+		t.Fatal(err)
+	}
+	if !req.AutoStart {
+		t.Fatal("persistence should enable auto start")
+	}
+}