feat: enforce single tool type with port config

- Replace interfaces array with interface_type string and requires_port boolean
- Add database migration for schema change
- Update backend model, API schemas, and validation
- Update frontend types and tool workshop UI
- Add dropdown for interface type selection
- Conditionally show/hide port fields based on requires_port
- Update tests and mock data
- All frontend tests pass (37/37)
- Frontend typecheck and lint pass

apps/api/src/main.py

@@ -137,7 +137,8 @@ async def seed_builtin_tool_types():
                 "display_name": "VS Code Server",
                 "description": "VS Code running in the browser via code-server",
                 "category": "editor",
-                "interfaces": ["web"],
+                "interface_type": "web",
+                "requires_port": True,
                 "compose_template": """version: "3.8"
 services:
   code-server:
@@ -160,7 +161,8 @@ services:
                 "display_name": "Jupyter Notebook",
                 "description": "Jupyter Lab for interactive development",
                 "category": "notebook",
-                "interfaces": ["web"],
+                "interface_type": "web",
+                "requires_port": True,
                 "default_port": 8888,
                 "compose_template": """version: "3.8"
 services:
@@ -181,7 +183,8 @@ services:
                 "display_name": "OpenCode",
                 "description": "AI coding assistant - run opencode in terminal",
                 "category": "ai-assistant",
-                "interfaces": ["terminal"],
+                "interface_type": "terminal",
+                "requires_port": False,
                 "default_port": 3000,
                 "compose_template": """version: "3.8"
 services:
@@ -227,7 +230,8 @@ volumes:
                     display_name=tool_data["display_name"],
                     description=tool_data["description"],
                     category=tool_data["category"],
-                    interfaces=tool_data["interfaces"],
+                    interface_type=tool_data["interface_type"],
+                    requires_port=tool_data["requires_port"],
                     definition_type="compose",
                     compose_template=tool_data["compose_template"],
                     required_variables=tool_data["required_variables"],
@@ -241,7 +245,8 @@ volumes:
                 existing.display_name = tool_data["display_name"]
                 existing.description = tool_data["description"]
                 existing.category = tool_data["category"]
-                existing.interfaces = tool_data["interfaces"]
+                existing.interface_type = tool_data["interface_type"]
+                existing.requires_port = tool_data["requires_port"]
                 existing.definition_type = "compose"
                 existing.compose_template = tool_data["compose_template"]
                 existing.required_variables = tool_data["required_variables"]