feat(agent): 完善权限与结果引用安全

src/routes/chatPermissionPolicy.ts

@@ -0,0 +1,57 @@
+export type ApprovalMode = "request" | "auto" | "always";
+
+const lowRiskToolPermissions = new Set([
+  "apply_layer_style",
+  "geocode",
+  "locate_features",
+  "render_junctions",
+  "show_chart",
+  "tjwater_server_query",
+  "view_history",
+  "view_scada",
+  "web_search",
+  "zoom_to_map",
+]);
+
+const normalizePermission = (permission: string) => permission.trim().toLowerCase();
+
+export const canAutoApprovePermission = (permission: string): boolean => {
+  const normalized = normalizePermission(permission);
+  if (lowRiskToolPermissions.has(normalized)) {
+    return true;
+  }
+
+  if (normalized.startsWith("tjwater_")) {
+    return lowRiskToolPermissions.has(normalized.slice("tjwater_".length));
+  }
+
+  return false;
+};
+
+export const resolvePermissionApproval = (
+  approvalMode: ApprovalMode,
+  permission: string,
+) => {
+  if (approvalMode === "always") {
+    return {
+      autoApprove: true,
+      title: "已按始终允许模式放行",
+      detail:
+        "当前会话处于始终允许模式，已放行本次权限请求；明确禁止的权限仍由 OpenCode 拒绝。",
+    } as const;
+  }
+
+  if (approvalMode === "auto" && canAutoApprovePermission(permission)) {
+    return {
+      autoApprove: true,
+      title: "已自动批准低风险权限",
+      detail: "当前批准模式允许自动执行低风险工具，已放行本次请求。",
+    } as const;
+  }
+
+  return {
+    autoApprove: false,
+    title: "等待权限确认",
+    detail: undefined,
+  } as const;
+};