Update admin UI with real API integration and secret management

examples/generate_keypairs.rs

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+/// Generate test secp256k1 keypairs for supervisor authentication testing
+/// 
+/// Run with: cargo run --example generate_keypairs
+
+use secp256k1::{Secp256k1, SecretKey, PublicKey};
+use hex;
+
+fn main() {
+    let secp = Secp256k1::new();
+    
+    println!("# Test Keypairs for Supervisor Auth\n");
+    println!("These are secp256k1 keypairs for testing the supervisor authentication system.\n");
+    println!("⚠️  WARNING: These are TEST keypairs only! Never use these in production!\n");
+    
+    // Generate 5 keypairs with simple private keys for testing
+    let test_keys = vec![
+        ("Alice (Admin)", "1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"),
+        ("Bob (User)", "fedcba0987654321fedcba0987654321fedcba0987654321fedcba0987654321"),
+        ("Charlie (Register)", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"),
+        ("Dave (Test)", "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"),
+        ("Eve (Test)", "cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc"),
+    ];
+    
+    for (i, (name, privkey_hex)) in test_keys.iter().enumerate() {
+        println!("## Keypair {} ({})", i + 1, name);
+        println!("```");
+        
+        // Parse private key
+        let privkey_bytes = hex::decode(privkey_hex).expect("Invalid hex");
+        let secret_key = SecretKey::from_slice(&privkey_bytes).expect("Invalid private key");
+        
+        // Derive public key
+        let public_key = PublicKey::from_secret_key(&secp, &secret_key);
+        
+        // Serialize keys
+        let pubkey_hex = hex::encode(public_key.serialize_uncompressed());
+        
+        println!("Private Key: 0x{}", privkey_hex);
+        println!("Public Key:  0x{}", pubkey_hex);
+        println!("```\n");
+    }
+    
+    println!("\n## Usage Examples\n");
+    println!("### Using with OpenRPC Client\n");
+    println!("```rust");
+    println!("use secp256k1::{{Secp256k1, SecretKey}};");
+    println!("use hex;");
+    println!();
+    println!("// Alice's private key");
+    println!("let alice_privkey = SecretKey::from_slice(");
+    println!("    &hex::decode(\"1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef\").unwrap()");
+    println!(").unwrap();");
+    println!();
+    println!("// Create client with signature");
+    println!("let client = WasmSupervisorClient::new_with_keypair(");
+    println!("    \"http://127.0.0.1:3030\",");
+    println!("    alice_privkey");
+    println!(");");
+    println!("```\n");
+    
+    println!("### Testing Different Scopes\n");
+    println!("1. **Admin Scope** - Use Alice's keypair for full admin access");
+    println!("2. **User Scope** - Use Bob's keypair for limited user access");
+    println!("3. **Register Scope** - Use Charlie's keypair for runner registration only\n");
+}