Close DV-01–04,07,09,13,14: unify operator-deck UX in server/web.

Standardize neon cyan on #00e8f5, wire SacredPageHeader across Builds/Path Tracer/LOTL, dedupe Pages.css, align Path Tracer chrome, drop dead wealth-deck CSS, add prefers-color-scheme shell + HelpTip, sidebar version from package.json build inject, and Vitest CSS regression guards.

server/internal/api/pathtracer_persist_test.go

@@ -0,0 +1,48 @@
+package api
+
+import (
+	"testing"
+	"time"
+
+	"crypto-miner-server/internal/db"
+)
+
+func TestPathTracerSessionSurvivesHandlerRestart(t *testing.T) {
+	database, err := db.New(t.TempDir())
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = database.Close() })
+	hub := NewWSHub(database)
+
+	sess := &TraceSession{
+		ID:            "sess-restart-abcdef12",
+		AgentIDs:      []string{"agent-1"},
+		CreatedAt:     time.Now().Add(-10 * time.Minute),
+		Ready:         true,
+		clientPrivKey: "PRIV",
+		clientPubKey:  "PUB",
+		Hops: []*HopInfo{{
+			AgentID:    "agent-1",
+			AgentName:  "Hop One",
+			ExternalIP: "203.0.113.10",
+			Port:       51820,
+			Status:     HopReady,
+		}},
+	}
+
+	h1 := NewPathTracerHandler(hub)
+	h1.mu.Lock()
+	h1.sessions[sess.ID] = sess
+	h1.mu.Unlock()
+	h1.persistSession(sess)
+
+	h2 := NewPathTracerHandler(hub)
+	restored := h2.getSession(sess.ID)
+	if restored == nil {
+		t.Fatal("session missing after handler restart")
+	}
+	if !restored.Ready || restored.clientPubKey != "PUB" {
+		t.Fatalf("restored session incomplete: ready=%v pub=%q", restored.Ready, restored.clientPubKey)
+	}
+}