refactor: remove sandbox system and simplify agent architecture

Remove the entire sandbox security system including:
- All sandbox-related Rust code and dependencies (gaol crate)
- Sandbox command handlers and platform-specific implementations
- Comprehensive test suite for sandbox functionality
- Agent sandbox settings UI components

Simplify agent configuration by removing sandbox and permission fields:
- Remove sandbox_enabled, enable_file_read, enable_file_write, enable_network from agent configs
- Update all CC agents to use simplified configuration format
- Remove sandbox references from documentation and UI

src/components/CreateAgent.tsx

@@ -9,7 +9,6 @@ import { api, type Agent } from "@/lib/api";
 import { cn } from "@/lib/utils";
 import MDEditor from "@uiw/react-md-editor";
 import { type AgentIconName } from "./CCAgents";
-import { AgentSandboxSettings } from "./AgentSandboxSettings";
 import { IconPicker, ICON_MAP } from "./IconPicker";
 
 interface CreateAgentProps {
@@ -48,10 +47,6 @@ export const CreateAgent: React.FC<CreateAgentProps> = ({
   const [systemPrompt, setSystemPrompt] = useState(agent?.system_prompt || "");
   const [defaultTask, setDefaultTask] = useState(agent?.default_task || "");
   const [model, setModel] = useState(agent?.model || "sonnet");
-  const [sandboxEnabled, setSandboxEnabled] = useState(agent?.sandbox_enabled ?? true);
-  const [enableFileRead, setEnableFileRead] = useState(agent?.enable_file_read ?? true);
-  const [enableFileWrite, setEnableFileWrite] = useState(agent?.enable_file_write ?? true);
-  const [enableNetwork, setEnableNetwork] = useState(agent?.enable_network ?? false);
   const [saving, setSaving] = useState(false);
   const [error, setError] = useState<string | null>(null);
   const [toast, setToast] = useState<{ message: string; type: "success" | "error" } | null>(null);
@@ -81,11 +76,7 @@ export const CreateAgent: React.FC<CreateAgentProps> = ({
           selectedIcon, 
           systemPrompt, 
           defaultTask || undefined, 
-          model,
-          sandboxEnabled,
-          enableFileRead,
-          enableFileWrite,
-          enableNetwork
+          model
         );
       } else {
         await api.createAgent(
@@ -93,11 +84,7 @@ export const CreateAgent: React.FC<CreateAgentProps> = ({
           selectedIcon, 
           systemPrompt, 
           defaultTask || undefined, 
-          model,
-          sandboxEnabled,
-          enableFileRead,
-          enableFileWrite,
-          enableNetwork
+          model
         );
       }
       
@@ -119,11 +106,7 @@ export const CreateAgent: React.FC<CreateAgentProps> = ({
          selectedIcon !== (agent?.icon || "bot") || 
          systemPrompt !== (agent?.system_prompt || "") ||
          defaultTask !== (agent?.default_task || "") ||
-         model !== (agent?.model || "sonnet") ||
-         sandboxEnabled !== (agent?.sandbox_enabled ?? true) ||
-         enableFileRead !== (agent?.enable_file_read ?? true) ||
-         enableFileWrite !== (agent?.enable_file_write ?? true) ||
-         enableNetwork !== (agent?.enable_network ?? false)) && 
+         model !== (agent?.model || "sonnet")) && 
         !confirm("You have unsaved changes. Are you sure you want to leave?")) {
       return;
     }
@@ -309,29 +292,7 @@ export const CreateAgent: React.FC<CreateAgentProps> = ({
                 </p>
               </div>
 
-              {/* Sandbox Settings */}
-              <AgentSandboxSettings
-                agent={{
-                  id: agent?.id,
-                  name,
-                  icon: selectedIcon,
-                  system_prompt: systemPrompt,
-                  default_task: defaultTask || undefined,
-                  model,
-                  sandbox_enabled: sandboxEnabled,
-                  enable_file_read: enableFileRead,
-                  enable_file_write: enableFileWrite,
-                  enable_network: enableNetwork,
-                  created_at: agent?.created_at || "",
-                  updated_at: agent?.updated_at || ""
-                }}
-                onUpdate={(updates) => {
-                  if ('sandbox_enabled' in updates) setSandboxEnabled(updates.sandbox_enabled!);
-                  if ('enable_file_read' in updates) setEnableFileRead(updates.enable_file_read!);
-                  if ('enable_file_write' in updates) setEnableFileWrite(updates.enable_file_write!);
-                  if ('enable_network' in updates) setEnableNetwork(updates.enable_network!);
-                }}
-              />
+
 
               {/* System Prompt Editor */}
               <div className="space-y-2">
@@ -377,4 +338,4 @@ export const CreateAgent: React.FC<CreateAgentProps> = ({
       />
     </div>
   );
-}; 
+};