feat: flow colors green=economic, purple=delegation, blue=data

Align flow kind colors to intuitive scheme:
- Economic: green (#4ade80)
- Governance → Delegation: purple (#a78bfa)
- Data: blue (#60a5fa)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lib/layer-types.ts

@@ -21,11 +21,11 @@ export type FlowKind =
 	| "custom";     // user-defined
 
 export const FLOW_COLORS: Record<FlowKind, string> = {
-	economic:   "#bef264", // lime
+	economic:   "#4ade80", // green
 	trust:      "#c4b5fd", // violet
-	data:       "#67e8f9", // cyan
+	data:       "#60a5fa", // blue
 	attention:  "#fcd34d", // amber
-	governance: "#f0abfc", // fuchsia
+	governance: "#a78bfa", // purple
 	resource:   "#6ee7b7", // emerald
 	custom:     "#94a3b8", // slate
 };
@@ -35,7 +35,7 @@ export const FLOW_LABELS: Record<FlowKind, string> = {
 	trust:      "Trust",
 	data:       "Data",
 	attention:  "Attention",
-	governance: "Governance",
+	governance: "Delegation",
 	resource:   "Resource",
 	custom:     "Custom",
 };