feat(policy): map --yolo to allowedTools wildcard policy

This PR maps the `--yolo` flag natively into a wildcard policy array
(`allowedTools: ["*"]`) and removes the concept of `ApprovalMode.YOLO` as a
distinct state in the application, fulfilling issue #11303.

This removes the hardcoded `ApprovalMode.YOLO` state and its associated
UI/bypasses. The `PolicyEngine` now evaluates YOLO purely via data-driven rules.

- Removes `ApprovalMode.YOLO`
- Removes UI toggle (`Ctrl+Y`) and indicators for YOLO
- Removes `yolo.toml`
- Updates A2A server and CLI config logic to translate YOLO into a wildcard tool
- Rewrites policy engine tests to evaluate the wildcard
- Enforces enterprise `disableYoloMode` and `secureModeEnabled` controls
  by actively preventing manual `--allowed-tools=*` bypasses.

Fixes #11303

packages/cli/src/ui/components/ApprovalModeIndicator.tsx

@@ -14,43 +14,45 @@ import { Command } from '../key/keyBindings.js';
 interface ApprovalModeIndicatorProps {
   approvalMode: ApprovalMode;
   allowPlanMode?: boolean;
+  isYoloMode?: boolean;
 }
 
 export const ApprovalModeIndicator: React.FC<ApprovalModeIndicatorProps> = ({
   approvalMode,
   allowPlanMode,
+  isYoloMode,
 }) => {
   let textColor = '';
   let textContent = '';
   let subText = '';
 
   const cycleHint = formatCommand(Command.CYCLE_APPROVAL_MODE);
-  const yoloHint = formatCommand(Command.TOGGLE_YOLO);
 
-  switch (approvalMode) {
-    case ApprovalMode.AUTO_EDIT:
-      textColor = theme.status.warning;
-      textContent = 'auto-accept edits';
-      subText = allowPlanMode
-        ? `${cycleHint} to plan`
-        : `${cycleHint} to manual`;
-      break;
-    case ApprovalMode.PLAN:
-      textColor = theme.status.success;
-      textContent = 'plan';
-      subText = `${cycleHint} to manual`;
-      break;
-    case ApprovalMode.YOLO:
-      textColor = theme.status.error;
-      textContent = 'YOLO';
-      subText = yoloHint;
-      break;
-    case ApprovalMode.DEFAULT:
-    default:
-      textColor = theme.text.accent;
-      textContent = '';
-      subText = `${cycleHint} to accept edits`;
-      break;
+  if (isYoloMode) {
+    textColor = theme.status.error;
+    textContent = 'YOLO';
+    subText = '';
+  } else {
+    switch (approvalMode) {
+      case ApprovalMode.AUTO_EDIT:
+        textColor = theme.status.warning;
+        textContent = 'auto-accept edits';
+        subText = allowPlanMode
+          ? `${cycleHint} to plan`
+          : `${cycleHint} to manual`;
+        break;
+      case ApprovalMode.PLAN:
+        textColor = theme.status.success;
+        textContent = 'plan';
+        subText = `${cycleHint} to manual`;
+        break;
+      case ApprovalMode.DEFAULT:
+      default:
+        textColor = theme.text.accent;
+        textContent = '';
+        subText = `${cycleHint} to accept edits`;
+        break;
+    }
   }
 
   return (