feat: add configurable CLI command and UI improvements

Add support for alternative CLI commands via CLI_COMMAND environment
variable, allowing users to use CLIs other than 'claude' (e.g., 'glm').
This change affects all server services and the main CLI launcher.

Key changes:

- Configurable CLI command via CLI_COMMAND env var (defaults to 'claude')
- Configurable Playwright headless mode via PLAYWRIGHT_HEADLESS env var
- Pin claude-agent-sdk version to <0.2.0 for stability
- Use tail -500 for progress notes to avoid context overflow
- Add project delete functionality with confirmation dialog
- Replace single-line input with resizable textarea in spec chat
- Add coder agent configuration for code implementation tasks
- Ignore issues/ directory in git

Files modified:
- client.py: CLI command and Playwright headless configuration
- server/main.py, server/services/*: CLI command configuration
- start.py: CLI command configuration and error messages
- .env.example: Document new environment variables
- .gitignore: Ignore issues/ directory
- requirements.txt: Pin SDK version
- .claude/templates/*: Use tail -500 for progress notes
- ui/src/components/ProjectSelector.tsx: Add delete button
- ui/src/components/SpecCreationChat.tsx: Auto-resizing textarea
- ui/src/components/ConfirmDialog.tsx: New reusable dialog
- .claude/agents/coder.md: New coder agent configuration

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

server/main.py

@@ -6,10 +6,26 @@ Main entry point for the Autonomous Coding UI server.
 Provides REST API, WebSocket, and static file serving.
 """
 
+import os
 import shutil
 from contextlib import asynccontextmanager
 from pathlib import Path
 
+from dotenv import load_dotenv
+
+# Load environment variables from .env file if present
+load_dotenv()
+
+
+def get_cli_command() -> str:
+    """
+    Get the CLI command to use for the agent.
+
+    Reads from CLI_COMMAND environment variable, defaults to 'claude'.
+    This allows users to use alternative CLIs like 'glm'.
+    """
+    return os.getenv("CLI_COMMAND", "claude")
+
 from fastapi import FastAPI, HTTPException, Request, WebSocket
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import FileResponse
@@ -124,11 +140,12 @@ async def health_check():
 @app.get("/api/setup/status", response_model=SetupStatus)
 async def setup_status():
     """Check system setup status."""
-    # Check for Claude CLI
-    claude_cli = shutil.which("claude") is not None
+    # Check for CLI (configurable via CLI_COMMAND environment variable)
+    cli_command = get_cli_command()
+    claude_cli = shutil.which(cli_command) is not None
 
-    # Check for Claude CLI configuration directory
-    # Note: Claude CLI no longer stores credentials in ~/.claude/.credentials.json
+    # Check for CLI configuration directory
+    # Note: CLI no longer stores credentials in ~/.claude/.credentials.json
     # The existence of ~/.claude indicates the CLI has been configured
     claude_dir = Path.home() / ".claude"
     credentials = claude_dir.exists() and claude_dir.is_dir()

server/services/assistant_chat_session.py

@@ -18,12 +18,27 @@ from pathlib import Path
 from typing import AsyncGenerator, Optional
 
 from claude_agent_sdk import ClaudeAgentOptions, ClaudeSDKClient
+from dotenv import load_dotenv
 
 from .assistant_database import (
     add_message,
     create_conversation,
 )
 
+# Load environment variables from .env file if present
+load_dotenv()
+
+
+def get_cli_command() -> str:
+    """
+    Get the CLI command to use for the agent.
+
+    Reads from CLI_COMMAND environment variable, defaults to 'claude'.
+    This allows users to use alternative CLIs like 'glm'.
+    """
+    return os.getenv("CLI_COMMAND", "claude")
+
+
 logger = logging.getLogger(__name__)
 
 # Root directory of the project
@@ -227,8 +242,9 @@ class AssistantChatSession:
         # Get system prompt with project context
         system_prompt = get_system_prompt(self.project_name, self.project_dir)
 
-        # Use system Claude CLI
-        system_cli = shutil.which("claude")
+        # Use system CLI (configurable via CLI_COMMAND environment variable)
+        cli_command = get_cli_command()
+        system_cli = shutil.which(cli_command)
 
         try:
             self.client = ClaudeSDKClient(

server/services/expand_chat_session.py

@@ -9,6 +9,7 @@ Uses the expand-project.md skill to help users add features to existing projects
 import asyncio
 import json
 import logging
+import os
 import re
 import shutil
 import threading
@@ -18,9 +19,23 @@ from pathlib import Path
 from typing import AsyncGenerator, Optional
 
 from claude_agent_sdk import ClaudeAgentOptions, ClaudeSDKClient
+from dotenv import load_dotenv
 
 from ..schemas import ImageAttachment
 
+# Load environment variables from .env file if present
+load_dotenv()
+
+
+def get_cli_command() -> str:
+    """
+    Get the CLI command to use for the agent.
+
+    Reads from CLI_COMMAND environment variable, defaults to 'claude'.
+    This allows users to use alternative CLIs like 'glm'.
+    """
+    return os.getenv("CLI_COMMAND", "claude")
+
 logger = logging.getLogger(__name__)
 
 
@@ -120,12 +135,14 @@ class ExpandChatSession:
         except UnicodeDecodeError:
             skill_content = skill_path.read_text(encoding="utf-8", errors="replace")
 
-        # Find and validate Claude CLI before creating temp files
-        system_cli = shutil.which("claude")
+        # Find and validate CLI before creating temp files
+        # CLI command is configurable via CLI_COMMAND environment variable
+        cli_command = get_cli_command()
+        system_cli = shutil.which(cli_command)
         if not system_cli:
             yield {
                 "type": "error",
-                "content": "Claude CLI not found. Please install Claude Code."
+                "content": f"CLI '{cli_command}' not found. Please install it or check your CLI_COMMAND setting."
             }
             return
 

server/services/spec_chat_session.py

@@ -8,6 +8,7 @@ Uses the create-spec.md skill to guide users through app spec creation.
 
 import json
 import logging
+import os
 import shutil
 import threading
 from datetime import datetime
@@ -15,9 +16,23 @@ from pathlib import Path
 from typing import AsyncGenerator, Optional
 
 from claude_agent_sdk import ClaudeAgentOptions, ClaudeSDKClient
+from dotenv import load_dotenv
 
 from ..schemas import ImageAttachment
 
+# Load environment variables from .env file if present
+load_dotenv()
+
+
+def get_cli_command() -> str:
+    """
+    Get the CLI command to use for the agent.
+
+    Reads from CLI_COMMAND environment variable, defaults to 'claude'.
+    This allows users to use alternative CLIs like 'glm'.
+    """
+    return os.getenv("CLI_COMMAND", "claude")
+
 logger = logging.getLogger(__name__)
 
 
@@ -142,7 +157,9 @@ class SpecChatSession:
         # Create Claude SDK client with limited tools for spec creation
         # Use Opus for best quality spec generation
         # Use system CLI to avoid bundled Bun runtime crash (exit code 3) on Windows
-        system_cli = shutil.which("claude")
+        # CLI command is configurable via CLI_COMMAND environment variable
+        cli_command = get_cli_command()
+        system_cli = shutil.which(cli_command)
         try:
             self.client = ClaudeSDKClient(
                 options=ClaudeAgentOptions(