Add forge pipeline polish, simple forge UX, and fleet management upgrades.

Fusion copies prep icon and version info via go-winres; optional Garble obfuscation, Authenticode signing, and dry-run size estimates. Forge Simple mode with smart defaults; fleet roster gets compact expandable cards, filters, bulk commands, per-agent notes/tags, and typed WebSocket payloads.

server/internal/models/agent.go

@@ -24,6 +24,9 @@ type Agent struct {
 	CPUUsagePct    float64 `json:"cpu_usage_pct"`
 	MemoryUsagePct float64 `json:"memory_usage_pct"`
 	UptimeSeconds  int     `json:"uptime_seconds"`
+
+	Notes string   `json:"notes"`
+	Tags  []string `json:"tags"`
 }
 
 type Share struct {