Add wallet authentication documentation to scenario guides

- Add wallet authentication section to scenarios 1, 2, 6, and 7
- Document three authentication methods: interactive prompt, password file, and environment variable
- Include security best practices for password handling
- Add code examples for each authentication method
- Recommend password files with restricted permissions for scripts
- Remove duplicate wallet balance requirement in scenario 7

docs/scenarios/01_wallet_basics.md

@@ -56,6 +56,31 @@ An hermes agent needs a wallet to:
 - AITBC blockchain node running
 - Keystore directory configured (`/etc/aitbc/keystore`)
 
+### **Wallet Authentication**
+The CLI supports multiple methods for wallet password authentication:
+
+```bash
+# Interactive prompt (default)
+aitbc wallet create my-agent-wallet
+
+# Password file (recommended for scripts)
+aitbc wallet create my-agent-wallet --password-file /path/to/password.txt
+
+# Direct password (not recommended for production)
+aitbc wallet create my-agent-wallet --password mypassword
+
+# Environment variable
+export KEYSTORE_PASSWORD=mypassword
+aitbc wallet create my-agent-wallet
+```
+
+**Security Best Practices:**
+- Use password files with restricted permissions (chmod 600)
+- Store password files outside the repository
+- Avoid hardcoding passwords in scripts
+- Use environment variables for CI/CD pipelines
+- Never commit passwords to version control
+
 ---
 
 ## 🔧 **Step-by-Step Workflow**

docs/scenarios/02_transaction_sending.md

@@ -57,6 +57,26 @@ An hermes agent needs to send transactions to:
 - Wallet created with sufficient balance
 - Blockchain node running and accessible
 
+### **Wallet Authentication**
+For transaction signing, the CLI requires wallet authentication:
+
+```bash
+# Interactive prompt (default)
+aitbc transaction send --from my-wallet --to <address> --amount 100
+
+# Password file (recommended for scripts)
+aitbc transaction send --from my-wallet --to <address> --amount 100 --password-file /path/to/password.txt
+
+# Environment variable
+export KEYSTORE_PASSWORD=mypassword
+aitbc transaction send --from my-wallet --to <address> --amount 100
+```
+
+**Security Best Practices:**
+- Use password files with restricted permissions (chmod 600)
+- Store password files outside the repository
+- Avoid hardcoding passwords in scripts
+
 ---
 
 ## 🔧 **Step-by-Step Workflow**

docs/scenarios/06_basic_trading.md

@@ -59,6 +59,26 @@ An hermes agent needs trading to:
 - Wallet with sufficient balance
 - Network connectivity
 
+### **Wallet Authentication**
+For trading operations requiring wallet signing, use one of these methods:
+
+```bash
+# Interactive prompt (default)
+aitbc trade buy --from my-wallet --pair AIT/BTC --amount 100
+
+# Password file (recommended for scripts)
+aitbc trade buy --from my-wallet --pair AIT/BTC --amount 100 --password-file /path/to/password.txt
+
+# Environment variable
+export KEYSTORE_PASSWORD=mypassword
+aitbc trade buy --from my-wallet --pair AIT/BTC --amount 100
+```
+
+**Security Best Practices:**
+- Use password files with restricted permissions (chmod 600)
+- Store password files outside the repository
+- Avoid hardcoding passwords in scripts
+
 ---
 
 ## 🔧 **Step-by-Step Workflow**

docs/scenarios/07_ai_job_submission.md

@@ -58,6 +58,27 @@ An hermes agent needs to submit AI jobs to:
 ### **Setup Required**
 - Coordinator API running
 - GPU marketplace available
+- Wallet with AIT tokens for payment
+
+### **Wallet Authentication**
+For AI job submission requiring wallet payments, use one of these methods:
+
+```bash
+# Interactive prompt (default)
+aitbc ai submit --wallet my-wallet --model llama2 --prompt "Hello world"
+
+# Password file (recommended for scripts)
+aitbc ai submit --wallet my-wallet --model llama2 --prompt "Hello world" --password-file /path/to/password.txt
+
+# Environment variable
+export KEYSTORE_PASSWORD=mypassword
+aitbc ai submit --wallet my-wallet --model llama2 --prompt "Hello world"
+```
+
+**Security Best Practices:**
+- Use password files with restricted permissions (chmod 600)
+- Store password files outside the repository
+- Avoid hardcoding passwords in scripts
 - Wallet with sufficient balance
 
 ---