fix: improve skill system prompts and simplify tool descriptions

- Simplify skill-creator installation flow
- Refine skill selection prompt for better matching
- Add parameter alias and env variable hints for tools
- Skip linkai-agent when unconfigured
- Create skills/ dir in workspace on init

agent/protocol/agent_stream.py

@@ -708,7 +708,6 @@ class AgentStreamExecutor:
             if not tool_id:
                 import uuid
                 tool_id = f"call_{uuid.uuid4().hex[:24]}"
-                logger.debug(f"⚠️ Tool call missing ID for '{tc.get('name')}', generated fallback: {tool_id}")
 
             try:
                 # Safely get arguments, handle None case