Fix database connection pool leak in init_db()

- Check if pool already exists before creating a new one
- Set pool size limits (min=2, max=10) to prevent exhaustion
- Multiple calls to init_db() were creating new pools without
  closing old ones, leading to "too many clients" errors

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

artdag.py

@@ -921,7 +921,8 @@ def import_file(filepath):
 
 @cli.command()
 @click.argument("filepath", type=click.Path(exists=True))
-def upload(filepath):
+@click.option("--name", "-n", help="Friendly name for the asset")
+def upload(filepath, name):
     """Upload a file to cache and IPFS. Requires login."""
     # Check auth
     token_data = load_token()
@@ -932,8 +933,9 @@ def upload(filepath):
     try:
         with open(filepath, "rb") as f:
             files = {"file": (Path(filepath).name, f)}
+            data = {"display_name": name} if name else {}
             headers = get_auth_header(require_token=True)
-            resp = requests.post(f"{get_server()}/cache/upload", files=files, headers=headers)
+            resp = requests.post(f"{get_server()}/cache/upload", files=files, data=data, headers=headers)
             if resp.status_code == 401:
                 click.echo("Authentication failed. Please login again.", err=True)
                 sys.exit(1)
@@ -946,10 +948,12 @@ def upload(filepath):
                 sys.exit(1)
             result = resp.json()
         click.echo(f"CID: {result['cid']}")
+        click.echo(f"Friendly name: {result.get('friendly_name', 'N/A')}")
         click.echo(f"Size: {result['size']} bytes")
         click.echo()
         click.echo("Use in recipes:")
-        click.echo(f'  (asset my-asset :cid "{result["cid"]}")')
+        friendly = result.get('friendly_name', result['cid'])
+        click.echo(f'  (streaming:make-video-source "{friendly}" 30)')
     except requests.RequestException as e:
         click.echo(f"Upload failed: {e}", err=True)
         sys.exit(1)
@@ -1594,10 +1598,11 @@ def upload_recipe(filepath):
 
 @cli.command("upload-effect")
 @click.argument("filepath", type=click.Path(exists=True))
-def upload_effect(filepath):
+@click.option("--name", "-n", help="Friendly name for the effect")
+def upload_effect(filepath, name):
     """Upload an effect file to IPFS. Requires login.
 
-    Effects are Python files with PEP 723 dependencies and @-tag metadata.
+    Effects are S-expression files (.sexp) with metadata in comments.
     Returns the IPFS CID for use in recipes.
     """
     token_data = load_token()
@@ -1605,17 +1610,18 @@ def upload_effect(filepath):
         click.echo("Not logged in. Please run: artdag login <username>", err=True)
         sys.exit(1)
 
-    # Check it's a Python file
+    # Check it's a sexp or py file
-    if not filepath.endswith(".py"):
+    if not filepath.endswith(".sexp") and not filepath.endswith(".py"):
-        click.echo("Effect must be a Python file (.py)", err=True)
+        click.echo("Effect must be a .sexp or .py file", err=True)
         sys.exit(1)
 
     # Upload
     try:
         with open(filepath, "rb") as f:
             files = {"file": (Path(filepath).name, f)}
+            data = {"display_name": name} if name else {}
             headers = get_auth_header(require_token=True)
-            resp = requests.post(f"{get_server()}/effects/upload", files=files, headers=headers)
+            resp = requests.post(f"{get_server()}/effects/upload", files=files, data=data, headers=headers)
             if resp.status_code == 401:
                 click.echo("Authentication failed. Please login again.", err=True)
                 sys.exit(1)
@@ -1627,14 +1633,13 @@ def upload_effect(filepath):
 
         click.echo(f"Uploaded effect: {result['name']} v{result.get('version', '1.0.0')}")
         click.echo(f"CID: {result['cid']}")
+        click.echo(f"Friendly name: {result.get('friendly_name', 'N/A')}")
         click.echo(f"Temporal: {result.get('temporal', False)}")
         if result.get('params'):
             click.echo(f"Parameters: {', '.join(p['name'] for p in result['params'])}")
-        if result.get('dependencies'):
-            click.echo(f"Dependencies: {', '.join(result['dependencies'])}")
         click.echo()
         click.echo("Use in recipes:")
-        click.echo(f'  (effect {result["name"]} :cid "{result["cid"]}")')
+        click.echo(f'  (effect {result["name"]} :name "{result.get("friendly_name", result["cid"])}")')
     except requests.RequestException as e:
         click.echo(f"Upload failed: {e}", err=True)
         sys.exit(1)

test_simple.sexp

@@ -0,0 +1,26 @@
+;; Simple Test - No external assets required
+;; Just generates a color gradient that changes over time
+
+(stream "simple_test"
+  :fps 30
+  :width 720
+  :height 720
+  :seed 42
+
+  ;; Load standard primitives
+  (require-primitives "geometry")
+  (require-primitives "core")
+  (require-primitives "math")
+  (require-primitives "image")
+  (require-primitives "color_ops")
+
+  ;; Frame pipeline - animated gradient
+  (frame
+    (let [;; Time-based color cycling (0-1 range)
+          r (+ 0.5 (* 0.5 (math:sin (* t 1))))
+          g (+ 0.5 (* 0.5 (math:sin (* t 1.3))))
+          b (+ 0.5 (* 0.5 (math:sin (* t 1.7))))
+          ;; Convert to 0-255 range and create solid color frame
+          color [(* r 255) (* g 255) (* b 255)]
+          frame (image:make-image 720 720 color)]
+      frame)))