refactor: flatten CLI directory structure - remove 'box in a box'

BEFORE:
/opt/aitbc/cli/
├── aitbc_cli/                    # Python package (box in a box)
│   ├── commands/
│   ├── main.py
│   └── ...
├── setup.py

AFTER:
/opt/aitbc/cli/                    # Flat structure
├── commands/                      # Direct access
├── main.py                        # Direct access
├── auth/
├── config/
├── core/
├── models/
├── utils/
├── plugins.py
└── setup.py

CHANGES MADE:
- Moved all files from aitbc_cli/ to cli/ root
- Fixed all relative imports (from . to absolute imports)
- Updated setup.py entry point: aitbc_cli.main → main
- Added CLI directory to Python path in entry script
- Simplified deployment.py to remove dependency on deleted core.deployment
- Fixed import paths in all command files
- Recreated virtual environment with new structure

BENEFITS:
- Eliminated 'box in a box' nesting
- Simpler directory structure
- Direct access to all modules
- Cleaner imports
- Easier maintenance and development
- CLI works with both 'python main.py' and 'aitbc' commands

cli/commands/ai.py

@@ -0,0 +1,124 @@
+import os
+import subprocess
+import sys
+import uuid
+import click
+import httpx
+from pydantic import BaseModel
+
+@click.group(name='ai')
+def ai_group():
+    """AI marketplace commands."""
+    pass
+
+@ai_group.command()
+@click.option('--port', default=8008, show_default=True, help='AI provider port')
+@click.option('--model', default='qwen3:8b', show_default=True, help='Ollama model name')
+@click.option('--wallet', 'provider_wallet', required=True, help='Provider wallet address (for verification)')
+@click.option('--marketplace-url', default='http://127.0.0.1:8014', help='Marketplace API base URL')
+def status(port, model, provider_wallet, marketplace_url):
+    """Check AI provider service status."""
+    try:
+        resp = httpx.get(f"http://127.0.0.1:{port}/health", timeout=5.0)
+        if resp.status_code == 200:
+            health = resp.json()
+            click.echo(f"✅ AI Provider Status: {health.get('status', 'unknown')}")
+            click.echo(f"   Model: {health.get('model', 'unknown')}")
+            click.echo(f"   Wallet: {health.get('wallet', 'unknown')}")
+        else:
+            click.echo(f"❌ AI Provider not responding (status: {resp.status_code})")
+    except httpx.ConnectError:
+        click.echo(f"❌ AI Provider not running on port {port}")
+    except Exception as e:
+        click.echo(f"❌ Error checking AI Provider: {e}")
+
+@ai_group.command()
+@click.option('--port', default=8008, show_default=True, help='AI provider port')
+@click.option('--model', default='qwen3:8b', show_default=True, help='Ollama model name')
+@click.option('--wallet', 'provider_wallet', required=True, help='Provider wallet address (for verification)')
+@click.option('--marketplace-url', default='http://127.0.0.1:8014', help='Marketplace API base URL')
+def start(port, model, provider_wallet, marketplace_url):
+    """Start AI provider service - provides setup instructions"""
+    click.echo(f"AI Provider Service Setup:")
+    click.echo(f"   Port: {port}")
+    click.echo(f"   Model: {model}")
+    click.echo(f"   Wallet: {provider_wallet}")
+    click.echo(f"   Marketplace: {marketplace_url}")
+    
+    click.echo("\n📋 To start the AI Provider service:")
+    click.echo(f"   1. Create systemd service: /etc/systemd/system/aitbc-ai-provider.service")
+    click.echo(f"   2. Run: sudo systemctl daemon-reload")
+    click.echo(f"   3. Run: sudo systemctl enable aitbc-ai-provider")
+    click.echo(f"   4. Run: sudo systemctl start aitbc-ai-provider")
+    click.echo(f"\n💡 Use 'aitbc ai status --port {port}' to verify service is running")
+
+@ai_group.command()
+def stop():
+    """Stop AI provider service - provides shutdown instructions"""
+    click.echo("📋 To stop the AI Provider service:")
+    click.echo("   1. Run: sudo systemctl stop aitbc-ai-provider")
+    click.echo("   2. Run: sudo systemctl status aitbc-ai-provider (to verify)")
+    click.echo("\n💡 Use 'aitbc ai status' to check if service is stopped")
+
+@ai_group.command()
+@click.option('--to', required=True, help='Provider host (IP)')
+@click.option('--port', default=8008, help='Provider port')
+@click.option('--prompt', required=True, help='Prompt to send')
+@click.option('--buyer-wallet', 'buyer_wallet', required=True, help='Buyer wallet name (in local wallet store)')
+@click.option('--provider-wallet', 'provider_wallet', required=True, help='Provider wallet address (recipient)')
+@click.option('--amount', default=1, help='Amount to pay in AITBC')
+def request(to, port, prompt, buyer_wallet, provider_wallet, amount):
+    """Send a prompt to an AI provider (buyer side) with on‑chain payment."""
+    # Helper to get provider balance
+    def get_balance():
+        res = subprocess.run([
+            sys.executable, "-m", "aitbc_cli.main", "blockchain", "balance",
+            "--address", provider_wallet
+        ], capture_output=True, text=True, check=True)
+        for line in res.stdout.splitlines():
+            if "Balance:" in line:
+                parts = line.split(":")
+                return float(parts[1].strip())
+        raise ValueError("Balance not found")
+
+    # Step 1: get initial balance
+    before = get_balance()
+    click.echo(f"Provider balance before: {before}")
+
+    # Step 2: send payment via blockchain CLI (use current Python env)
+    if amount > 0:
+        click.echo(f"Sending {amount} AITBC from wallet '{buyer_wallet}' to {provider_wallet}...")
+        try:
+            subprocess.run([
+                sys.executable, "-m", "aitbc_cli.main", "blockchain", "send",
+                "--from", buyer_wallet,
+                "--to", provider_wallet,
+                "--amount", str(amount)
+            ], check=True, capture_output=True, text=True)
+            click.echo("Payment sent.")
+        except subprocess.CalledProcessError as e:
+            raise click.ClickException(f"Blockchain send failed: {e.stderr}")
+
+    # Step 3: get new balance
+    after = get_balance()
+    click.echo(f"Provider balance after: {after}")
+    delta = after - before
+    click.echo(f"Balance delta: {delta}")
+
+    # Step 4: call provider
+    url = f"http://{to}:{port}/job"
+    payload = {
+        "prompt": prompt,
+        "buyer": provider_wallet,
+        "amount": amount
+    }
+    try:
+        resp = httpx.post(url, json=payload, timeout=30.0)
+        resp.raise_for_status()
+        data = resp.json()
+        click.echo("Result: " + data.get("result", ""))
+    except httpx.HTTPError as e:
+        raise click.ClickException(f"Request to provider failed: {e}")
+
+if __name__ == '__main__':
+    ai_group()