fix: propagate webhook mode to health monitor snapshot

Webhook channels (LINE, Zalo, Nextcloud Talk, BlueBubbles) are
incorrectly flagged as stale-socket during quiet periods because
snapshot.mode is always undefined, making the mode !== "webhook"
guard in evaluateChannelHealth dead code.

Add mode: "webhook" to each webhook plugin's describeAccount and
propagate described.mode in getRuntimeSnapshot.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -10,6 +10,7 @@ Docs: https://docs.openclaw.ai
 - Memory/QMD: resolve slugified `memory_search` file hints back to the indexed filesystem path before returning search hits, so `memory_get` works again for mixed-case and spaced paths. (#50313) Thanks @erra9x.
 - Security/LINE: make webhook signature validation run the timing-safe compare even when the supplied signature length is wrong, closing a small timing side-channel. (#55663) Thanks @gavyngong.
 - LINE/status: stop `openclaw status` from warning about missing credentials when sanitized LINE snapshots are already configured, while still surfacing whether the missing field is the token or secret. (#45701) Thanks @tamaosamu.
+- Gateway/health: carry webhook-vs-polling account mode from channel descriptors into runtime snapshots so passive channels like LINE and BlueBubbles skip false stale-socket health failures. (#47488) Thanks @karesansui-u.
 
 ## 2026.3.28-beta.1
 

extensions/bluebubbles/src/channel-shared.ts

@@ -63,6 +63,7 @@ export function describeBlueBubblesAccount(account: ResolvedBlueBubblesAccount)
     configured: account.configured,
     extra: {
       baseUrl: account.baseUrl,
+      mode: "webhook",
     },
   });
 }

extensions/line/src/channel-shared.ts

@@ -43,6 +43,7 @@ export const lineChannelPluginCommon = {
       enabled: account.enabled,
       configured: hasLineCredentials(account),
       tokenSource: account.tokenSource ?? undefined,
+      mode: "webhook",
     }),
   },
 } satisfies Pick<

extensions/zalo/src/channel.ts

@@ -177,6 +177,7 @@ export const zaloPlugin: ChannelPlugin<ResolvedZaloAccount, ZaloProbeResult> =
             configured: Boolean(account.token?.trim()),
             extra: {
               tokenSource: account.tokenSource,
+              mode: account.config.webhookUrl ? "webhook" : "polling",
             },
           }),
       },

src/gateway/server-channels.test.ts

@@ -46,6 +46,7 @@ function createTestPlugin(params?: {
   account?: TestAccount;
   startAccount?: NonNullable<ChannelPlugin<TestAccount>["gateway"]>["startAccount"];
   includeDescribeAccount?: boolean;
+  describeAccount?: ChannelPlugin<TestAccount>["config"]["describeAccount"];
   resolveAccount?: ChannelPlugin<TestAccount>["config"]["resolveAccount"];
   isConfigured?: ChannelPlugin<TestAccount>["config"]["isConfigured"];
 }): ChannelPlugin<TestAccount> {
@@ -59,11 +60,13 @@ function createTestPlugin(params?: {
     ...(params?.isConfigured ? { isConfigured: params.isConfigured } : {}),
   };
   if (includeDescribeAccount) {
-    config.describeAccount = (resolved) => ({
-      accountId: DEFAULT_ACCOUNT_ID,
-      enabled: resolved.enabled !== false,
-      configured: resolved.configured !== false,
-    });
+    config.describeAccount =
+      params?.describeAccount ??
+      ((resolved) => ({
+        accountId: DEFAULT_ACCOUNT_ID,
+        enabled: resolved.enabled !== false,
+        configured: resolved.configured !== false,
+      }));
   }
   const gateway: NonNullable<ChannelPlugin<TestAccount>["gateway"]> = {};
   if (params?.startAccount) {
@@ -198,6 +201,23 @@ describe("server-channels auto restart", () => {
     expect(account?.configured).toBe(true);
   });
 
+  it("forwards described mode into runtime snapshots", () => {
+    installTestRegistry(
+      createTestPlugin({
+        describeAccount: (resolved) => ({
+          accountId: DEFAULT_ACCOUNT_ID,
+          enabled: resolved.enabled !== false,
+          configured: resolved.configured !== false,
+          mode: "webhook",
+        }),
+      }),
+    );
+    const manager = createManager();
+    const snapshot = manager.getRuntimeSnapshot();
+    const account = snapshot.channelAccounts.discord?.[DEFAULT_ACCOUNT_ID];
+    expect(account?.mode).toBe("webhook");
+  });
+
   it("passes channelRuntime through channel gateway context when provided", async () => {
     const channelRuntime = { marker: "channel-runtime" } as unknown as PluginRuntime["channel"];
     const startAccount = vi.fn(async (ctx) => {

src/gateway/server-channels.ts

@@ -555,6 +555,9 @@ export function createChannelManager(opts: ChannelManagerOptions): ChannelManage
         const next = { ...current, accountId: id };
         next.enabled = enabled;
         next.configured = typeof configured === "boolean" ? configured : (next.configured ?? true);
+        if (described?.mode !== undefined) {
+          next.mode = described.mode;
+        }
         if (!next.running) {
           if (!enabled) {
             next.lastError ??= plugin.config.disabledReason?.(account, cfg) ?? "disabled";