Add ErrorBoundary, Config page, 4-col quick links

- ErrorBoundary wraps all pages with retry button
- Config: read-only view of model, terminal, memory, display settings
- Pulse quick links now 4-col: Skills, Cron, Soul, Config

components/ErrorBoundary.tsx

@@ -0,0 +1,36 @@
+"use client";
+
+import { Component, type ReactNode } from "react";
+import { AlertTriangle, RefreshCw } from "lucide-react";
+
+interface Props { children: ReactNode; fallbackLabel?: string }
+interface State { error: Error | null }
+
+export class ErrorBoundary extends Component<Props, State> {
+  state: State = { error: null };
+
+  static getDerivedStateFromError(error: Error) {
+    return { error };
+  }
+
+  render() {
+    if (this.state.error) {
+      return (
+        <div className="glass p-6 text-center space-y-3">
+          <AlertTriangle size={24} className="mx-auto text-amber-400" />
+          <p className="text-sm text-zinc-400">
+            {this.props.fallbackLabel || "Something went wrong"}
+          </p>
+          <p className="text-xs text-zinc-600 font-mono">{this.state.error.message}</p>
+          <button
+            onClick={() => this.setState({ error: null })}
+            className="flex items-center gap-1.5 mx-auto px-3 py-1.5 rounded-lg text-xs text-amber-400 active:bg-white/[0.04]"
+          >
+            <RefreshCw size={12} /> Retry
+          </button>
+        </div>
+      );
+    }
+    return this.props.children;
+  }
+}