fix(channels): add optional defaultAccount routing

src/line/accounts.test.ts

@@ -100,6 +100,39 @@ describe("LINE accounts", () => {
   });
 
   describe("resolveDefaultLineAccountId", () => {
+    it("prefers channels.line.defaultAccount when configured", () => {
+      const cfg: OpenClawConfig = {
+        channels: {
+          line: {
+            defaultAccount: "business",
+            accounts: {
+              business: { enabled: true },
+              support: { enabled: true },
+            },
+          },
+        },
+      };
+
+      const id = resolveDefaultLineAccountId(cfg);
+      expect(id).toBe("business");
+    });
+
+    it("normalizes channels.line.defaultAccount before lookup", () => {
+      const cfg: OpenClawConfig = {
+        channels: {
+          line: {
+            defaultAccount: "Business Ops",
+            accounts: {
+              "business-ops": { enabled: true },
+            },
+          },
+        },
+      };
+
+      const id = resolveDefaultLineAccountId(cfg);
+      expect(id).toBe("business-ops");
+    });
+
     it("returns first named account when default not configured", () => {
       const cfg: OpenClawConfig = {
         channels: {
@@ -115,6 +148,22 @@ describe("LINE accounts", () => {
 
       expect(id).toBe("business");
     });
+
+    it("falls back when channels.line.defaultAccount is missing", () => {
+      const cfg: OpenClawConfig = {
+        channels: {
+          line: {
+            defaultAccount: "missing",
+            accounts: {
+              business: { enabled: true },
+            },
+          },
+        },
+      };
+
+      const id = resolveDefaultLineAccountId(cfg);
+      expect(id).toBe("business");
+    });
   });
 
   describe("normalizeAccountId", () => {

src/line/accounts.ts

@@ -3,6 +3,7 @@ import type { OpenClawConfig } from "../config/config.js";
 import {
   DEFAULT_ACCOUNT_ID,
   normalizeAccountId as normalizeSharedAccountId,
+  normalizeOptionalAccountId,
 } from "../routing/account-id.js";
 import { resolveAccountEntry } from "../routing/account-lookup.js";
 import type {
@@ -124,8 +125,16 @@ export function resolveLineAccount(params: {
     accountConfig,
   });
 
+  const {
+    accounts: _ignoredAccounts,
+    defaultAccount: _ignoredDefaultAccount,
+    ...lineBase
+  } = (lineConfig ?? {}) as LineConfig & {
+    accounts?: unknown;
+    defaultAccount?: unknown;
+  };
   const mergedConfig: LineConfig & LineAccountConfig = {
-    ...lineConfig,
+    ...lineBase,
     ...accountConfig,
   };
 
@@ -172,6 +181,15 @@ export function listLineAccountIds(cfg: OpenClawConfig): string[] {
 }
 
 export function resolveDefaultLineAccountId(cfg: OpenClawConfig): string {
+  const preferred = normalizeOptionalAccountId(
+    (cfg.channels?.line as LineConfig | undefined)?.defaultAccount,
+  );
+  if (
+    preferred &&
+    listLineAccountIds(cfg).some((accountId) => normalizeSharedAccountId(accountId) === preferred)
+  ) {
+    return preferred;
+  }
   const ids = listLineAccountIds(cfg);
   if (ids.includes(DEFAULT_ACCOUNT_ID)) {
     return DEFAULT_ACCOUNT_ID;

src/line/config-schema.ts

@@ -35,6 +35,7 @@ const LineAccountConfigSchema = LineCommonConfigSchema.extend({
 
 export const LineConfigSchema = LineCommonConfigSchema.extend({
   accounts: z.record(z.string(), LineAccountConfigSchema.optional()).optional(),
+  defaultAccount: z.string().optional(),
   groups: z.record(z.string(), LineGroupConfigSchema.optional()).optional(),
 }).strict();
 

src/line/types.ts

@@ -32,6 +32,8 @@ interface LineAccountBaseConfig {
 export interface LineConfig extends LineAccountBaseConfig {
   /** Per-account overrides keyed by account id. */
   accounts?: Record<string, LineAccountConfig>;
+  /** Optional default account id when multiple accounts are configured. */
+  defaultAccount?: string;
 }
 
 export interface LineAccountConfig extends LineAccountBaseConfig {}