Fix minor issues and add wallet funding documentation

Changes:
- Fix certificate viewing display issue in master_training_launcher.sh
  - Use array to store certificate files for reliable iteration
  - Add error handling for read command
  - Ensure CERT_DIR exists before checking for certificates
  - Fix certificate selection using array index instead of head/tail

- Add wallet funding script (scripts/training/fund_wallet.sh)
  - Fund wallets from genesis using genesis password
  - Reads password from /var/lib/aitbc/keystore/.genesis_password
  - Verifies genesis balance before funding
  - Shows transaction hash and wallet balance after funding

- Add wallet funding documentation (docs/agent-training/WALLET_FUNDING.md)
  - Genesis wallet details and password location
  - Quick funding script usage
  - Manual funding with AITBC CLI
  - Faucet service information
  - Common training wallets
  - Troubleshooting guide
  - Security notes

scripts/training/fund_wallet.sh

@@ -0,0 +1,104 @@
+#!/bin/bash
+# AITBC Wallet Funding Script
+# Funds a wallet from the genesis wallet using the genesis password
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+AITBC_DIR="$(cd "$SCRIPT_DIR/../.." && pwd)"
+CLI_PATH="$AITBC_DIR/aitbc-cli"
+GENESIS_PASSWORD_FILE="/var/lib/aitbc/keystore/.genesis_password"
+
+# Colors
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m'
+
+print_status() {
+    echo -e "${BLUE}[INFO]${NC} $1"
+}
+
+print_success() {
+    echo -e "${GREEN}[SUCCESS]${NC} $1"
+}
+
+print_error() {
+    echo -e "${RED}[ERROR]${NC} $1"
+}
+
+print_warning() {
+    echo -e "${YELLOW}[WARNING]${NC} $1"
+}
+
+usage() {
+    echo "Usage: $0 <wallet_name> [amount]"
+    echo ""
+    echo "Arguments:"
+    echo "  wallet_name  Name of the wallet to fund"
+    echo "  amount      Amount of AIT to send (default: 1000)"
+    echo ""
+    echo "Example:"
+    echo "  $0 hermes-trainee 1000"
+    echo ""
+    echo "Note: The genesis password is read from $GENESIS_PASSWORD_FILE"
+    exit 1
+}
+
+if [ $# -lt 1 ]; then
+    usage
+fi
+
+WALLET_NAME="$1"
+AMOUNT="${2:-1000}"
+
+print_status "Funding wallet: $WALLET_NAME"
+print_status "Amount: $AMOUNT AIT"
+
+# Check if genesis password file exists
+if [ ! -f "$GENESIS_PASSWORD_FILE" ]; then
+    print_error "Genesis password file not found: $GENESIS_PASSWORD_FILE"
+    print_error "Please ensure the genesis wallet is properly configured"
+    exit 1
+fi
+
+# Read genesis password
+GENESIS_PASSWORD=$(cat "$GENESIS_PASSWORD_FILE")
+if [ -z "$GENESIS_PASSWORD" ]; then
+    print_error "Genesis password file is empty"
+    exit 1
+fi
+
+print_status "Genesis password loaded"
+
+# Check if CLI exists
+if [ ! -f "$CLI_PATH" ]; then
+    print_error "AITBC CLI not found: $CLI_PATH"
+    exit 1
+fi
+
+# Check genesis wallet balance
+print_status "Checking genesis wallet balance..."
+GENESIS_BALANCE=$("$CLI_PATH" wallet balance genesis 2>&1 || echo "0")
+print_status "Genesis wallet balance: $GENESIS_BALANCE"
+
+# Fund the wallet
+print_status "Sending $AMOUNT AIT from genesis to $WALLET_NAME..."
+cd "$AITBC_DIR"
+RESULT=$("$CLI_PATH" wallet send genesis "$WALLET_NAME" "$AMOUNT" "$GENESIS_PASSWORD" 2>&1)
+
+if [ $? -eq 0 ]; then
+    print_success "Transaction sent successfully"
+    echo "Transaction hash: $RESULT"
+    
+    # Verify balance
+    print_status "Verifying wallet balance..."
+    WALLET_BALANCE=$("$CLI_PATH" wallet balance "$WALLET_NAME" 2>&1 || echo "0")
+    print_success "Wallet $WALLET_NAME balance: $WALLET_BALANCE"
+else
+    print_error "Funding failed: $RESULT"
+    exit 1
+fi
+
+print_success "Wallet funding completed"

scripts/training/master_training_launcher.sh

@@ -357,7 +357,18 @@ display_badge() {
 view_certificates() {
     print_header "Stage Completion Certificates"
     
-    if [ ! -d "$CERT_DIR" ] || [ -z "$(ls -A $CERT_DIR)" ]; then
+    # Ensure directory exists
+    mkdir -p "$CERT_DIR"
+    
+    # Check for certificates
+    local cert_files=()
+    for cert_file in "$CERT_DIR"/stage*_certificate.json; do
+        if [ -f "$cert_file" ]; then
+            cert_files+=("$cert_file")
+        fi
+    done
+    
+    if [ ${#cert_files[@]} -eq 0 ]; then
         print_warning "No certificates found yet"
         echo "Complete stages to earn certificates"
         return 0
@@ -367,7 +378,7 @@ view_certificates() {
     echo
     
     local cert_count=0
-    for cert_file in "$CERT_DIR"/stage*_certificate.json; do
+    for cert_file in "${cert_files[@]}"; do
         if [ -f "$cert_file" ]; then
             ((cert_count++))
             local stage_num=$(echo "$cert_file" | grep -o 'stage[0-9]' | grep -o '[0-9]')
@@ -385,10 +396,10 @@ view_certificates() {
     
     echo
     echo -n "View certificate details? [1-$cert_count/N]: "
-    read -r view_choice
+    read -r view_choice || view_choice="N"
     
-    if [[ "$view_choice" =~ ^[0-9]+$ ]] && [ "$view_choice" -le "$cert_count" ]; then
-        local cert_file=$(ls "$CERT_DIR"/stage*_certificate.json | head -"$view_choice" | tail -1)
+    if [[ "$view_choice" =~ ^[0-9]+$ ]] && [ "$view_choice" -ge 1 ] && [ "$view_choice" -le "$cert_count" ]; then
+        local cert_file="${cert_files[$((view_choice-1))]}"
         if [ -f "$cert_file" ]; then
             echo
             echo -e "${BOLD}Certificate Details:${NC}"