refactor: extract data logic into reusable hooks (PR5)

New hooks:
- useSettings: generic settings CRUD (fetch/save with loading/saving states)
- useBridgeAdapter: bridge adapter settings + verify flow
- useBridgeStatus: bridge status polling + start/stop control
- useAccountInfo: Claude SDK account info fetching

Refactored components:
- GeneralSection: replace inline fetchAccountInfo with useAccountInfo hook
- BridgeSection: replace inline fetchStatus/startBridge/stopBridge + polling
  interval with useBridgeStatus hook (removed ~50 lines)

The remaining bridge adapter sections (Telegram/Discord/Feishu/QQ) can be
migrated to useBridgeAdapter in a follow-up — hooks are ready for adoption.

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

src/components/bridge/BridgeSection.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { useState, useCallback, useEffect, useRef } from "react";
+import { useState, useCallback, useEffect } from "react";
 import { Button } from "@/components/ui/button";
 import { Switch } from "@/components/ui/switch";
 import { Input } from "@/components/ui/input";
@@ -15,25 +15,12 @@ import {
 } from "@/components/ui/select";
 import { SpinnerGap, CheckCircle, Warning, TelegramLogo, ChatTeardrop, GameController, ChatsCircle } from "@phosphor-icons/react";
 import { useTranslation } from "@/hooks/useTranslation";
+import { useBridgeStatus } from "@/hooks/useBridgeStatus";
 import { SettingsCard } from "@/components/patterns/SettingsCard";
 import { FieldRow } from "@/components/patterns/FieldRow";
 import { StatusBanner } from "@/components/patterns/StatusBanner";
 import type { ProviderModelGroup } from "@/types";
 
-interface AdapterStatus {
-  channelType: string;
-  running: boolean;
-  connectedAt: string | null;
-  lastMessageAt: string | null;
-  error: string | null;
-}
-
-interface BridgeStatus {
-  running: boolean;
-  startedAt: string | null;
-  adapters: AdapterStatus[];
-}
-
 interface BridgeSettings {
   remote_bridge_enabled: string;
   bridge_telegram_enabled: string;
@@ -60,14 +47,11 @@ const DEFAULT_SETTINGS: BridgeSettings = {
 
 export function BridgeSection() {
   const [settings, setSettings] = useState<BridgeSettings>(DEFAULT_SETTINGS);
-  const [bridgeStatus, setBridgeStatus] = useState<BridgeStatus | null>(null);
   const [saving, setSaving] = useState(false);
-  const [starting, setStarting] = useState(false);
-  const [stopping, setStopping] = useState(false);
   const [workDir, setWorkDir] = useState("");
   const [model, setModel] = useState("");
   const [providerGroups, setProviderGroups] = useState<ProviderModelGroup[]>([]);
-  const pollRef = useRef<ReturnType<typeof setInterval> | null>(null);
+  const { bridgeStatus, starting, stopping, startBridge, stopBridge } = useBridgeStatus();
   const { t } = useTranslation();
 
   const fetchSettings = useCallback(async () => {
@@ -92,18 +76,6 @@ export function BridgeSection() {
     }
   }, []);
 
-  const fetchStatus = useCallback(async () => {
-    try {
-      const res = await fetch("/api/bridge");
-      if (res.ok) {
-        const data = await res.json();
-        setBridgeStatus(data);
-      }
-    } catch {
-      // ignore
-    }
-  }, []);
-
   const fetchModels = useCallback(async () => {
     try {
       const res = await fetch("/api/providers/models");
@@ -120,24 +92,8 @@ export function BridgeSection() {
 
   useEffect(() => {
     fetchSettings();
-    fetchStatus();
     fetchModels();
-  }, [fetchSettings, fetchStatus, fetchModels]);
-
-  // Poll bridge status while bridge is running
-  useEffect(() => {
-    if (bridgeStatus?.running) {
-      pollRef.current = setInterval(fetchStatus, 5000);
-    } else if (pollRef.current) {
-      clearInterval(pollRef.current);
-      pollRef.current = null;
-    }
-    return () => {
-      if (pollRef.current) {
-        clearInterval(pollRef.current);
-      }
-    };
-  }, [bridgeStatus?.running, fetchStatus]);
+  }, [fetchSettings, fetchModels]);
 
   const saveSettings = async (updates: Partial<BridgeSettings>) => {
     setSaving(true);
@@ -208,38 +164,6 @@ export function BridgeSection() {
     }
   };
 
-  const handleStartBridge = async () => {
-    setStarting(true);
-    try {
-      await fetch("/api/bridge", {
-        method: "POST",
-        headers: { "Content-Type": "application/json" },
-        body: JSON.stringify({ action: "start" }),
-      });
-      await fetchStatus();
-    } catch {
-      // ignore
-    } finally {
-      setStarting(false);
-    }
-  };
-
-  const handleStopBridge = async () => {
-    setStopping(true);
-    try {
-      await fetch("/api/bridge", {
-        method: "POST",
-        headers: { "Content-Type": "application/json" },
-        body: JSON.stringify({ action: "stop" }),
-      });
-      await fetchStatus();
-    } catch {
-      // ignore
-    } finally {
-      setStopping(false);
-    }
-  };
-
   const handleToggleAutoStart = (checked: boolean) => {
     saveSettings({ bridge_auto_start: checked ? "true" : "" });
   };
@@ -304,7 +228,7 @@ export function BridgeSection() {
                 <Button
                   size="sm"
                   variant="outline"
-                  onClick={handleStopBridge}
+                  onClick={stopBridge}
                   disabled={stopping}
                 >
                   {stopping ? (
@@ -318,7 +242,7 @@ export function BridgeSection() {
               ) : (
                 <Button
                   size="sm"
-                  onClick={handleStartBridge}
+                  onClick={startBridge}
                   disabled={starting}
                 >
                   {starting ? (

src/components/settings/GeneralSection.tsx

@@ -16,6 +16,7 @@ import {
 import { ArrowClockwise, SpinnerGap } from "@phosphor-icons/react";
 import { useUpdate } from "@/hooks/useUpdate";
 import { useTranslation } from "@/hooks/useTranslation";
+import { useAccountInfo } from "@/hooks/useAccountInfo";
 import { SUPPORTED_LOCALES, type Locale } from "@/i18n";
 import type { TranslationKey } from "@/i18n";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
@@ -126,7 +127,7 @@ export function GeneralSection() {
   const [showSkipPermWarning, setShowSkipPermWarning] = useState(false);
   const [skipPermSaving, setSkipPermSaving] = useState(false);
   const [thinkingMode, setThinkingMode] = useState<string>('adaptive');
-  const [accountInfo, setAccountInfo] = useState<{ email?: string; organization?: string; subscriptionType?: string } | null>(null);
+  const { accountInfo } = useAccountInfo();
   const { t, locale, setLocale } = useTranslation();
 
   const fetchAppSettings = useCallback(async () => {
@@ -145,24 +146,9 @@ export function GeneralSection() {
     }
   }, []);
 
-  const fetchAccountInfo = useCallback(async () => {
-    try {
-      const res = await fetch("/api/sdk/account");
-      if (res.ok) {
-        const data = await res.json();
-        if (data.account) {
-          setAccountInfo(data.account);
-        }
-      }
-    } catch {
-      // Account info not available
-    }
-  }, []);
-
   useEffect(() => {
     fetchAppSettings();
-    fetchAccountInfo();
-  }, [fetchAppSettings, fetchAccountInfo]);
+  }, [fetchAppSettings]);
 
   const saveThinkingMode = async (mode: string) => {
     setThinkingMode(mode);

src/hooks/useAccountInfo.ts

@@ -0,0 +1,41 @@
+import { useState, useCallback, useEffect } from "react";
+
+interface AccountInfo {
+  email?: string;
+  organization?: string;
+  subscriptionType?: string;
+}
+
+/**
+ * Hook for fetching Claude SDK account information.
+ */
+export function useAccountInfo(): {
+  accountInfo: AccountInfo | null;
+  loading: boolean;
+  refresh: () => Promise<void>;
+} {
+  const [accountInfo, setAccountInfo] = useState<AccountInfo | null>(null);
+  const [loading, setLoading] = useState(true);
+
+  const refresh = useCallback(async () => {
+    try {
+      const res = await fetch("/api/sdk/account");
+      if (res.ok) {
+        const data = await res.json();
+        if (data.account) {
+          setAccountInfo(data.account);
+        }
+      }
+    } catch {
+      // Account info not available
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    refresh();
+  }, [refresh]);
+
+  return { accountInfo, loading, refresh };
+}

src/hooks/useBridgeAdapter.ts

@@ -0,0 +1,106 @@
+import { useState, useCallback, useEffect } from "react";
+
+interface VerifyResult {
+  ok: boolean;
+  message: string;
+}
+
+/**
+ * Generic hook for bridge adapter settings management.
+ * Encapsulates the fetch/save/verify pattern shared by all bridge adapters
+ * (Telegram, Discord, Feishu, QQ).
+ */
+export function useBridgeAdapter<T extends Record<string, string>>(
+  platform: string,
+  defaults: T
+): {
+  settings: T;
+  loading: boolean;
+  saving: boolean;
+  save: (updates: Partial<T>) => Promise<void>;
+  refresh: () => Promise<void>;
+  verify: (params: Record<string, string>) => Promise<void>;
+  verifying: boolean;
+  verifyResult: VerifyResult | null;
+  setVerifyResult: (result: VerifyResult | null) => void;
+} {
+  const [settings, setSettings] = useState<T>(defaults);
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [verifying, setVerifying] = useState(false);
+  const [verifyResult, setVerifyResult] = useState<VerifyResult | null>(null);
+
+  const endpoint = `/api/settings/${platform}`;
+
+  const refresh = useCallback(async () => {
+    try {
+      const res = await fetch(endpoint);
+      if (res.ok) {
+        const data = await res.json();
+        setSettings({ ...defaults, ...data.settings });
+      }
+    } catch {
+      // ignore
+    } finally {
+      setLoading(false);
+    }
+  }, [endpoint, defaults]);
+
+  useEffect(() => {
+    refresh();
+  }, [refresh]);
+
+  const save = useCallback(async (updates: Partial<T>) => {
+    setSaving(true);
+    try {
+      const res = await fetch(endpoint, {
+        method: "PUT",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ settings: updates }),
+      });
+      if (res.ok) {
+        setSettings((prev) => ({ ...prev, ...updates }));
+      }
+    } catch {
+      // ignore
+    } finally {
+      setSaving(false);
+    }
+  }, [endpoint]);
+
+  const verify = useCallback(async (params: Record<string, string>) => {
+    setVerifying(true);
+    setVerifyResult(null);
+    try {
+      const res = await fetch(`${endpoint}/verify`, {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify(params),
+      });
+      const data = await res.json();
+
+      if (data.verified) {
+        setVerifyResult({
+          ok: true,
+          message: data.botName
+            ? `Verified as ${data.botName}`
+            : "Verification successful",
+        });
+      } else {
+        setVerifyResult({
+          ok: false,
+          message: data.error || "Verification failed",
+        });
+      }
+    } catch {
+      setVerifyResult({ ok: false, message: "Verification failed" });
+    } finally {
+      setVerifying(false);
+    }
+  }, [endpoint]);
+
+  return {
+    settings, loading, saving, save, refresh,
+    verify, verifying, verifyResult, setVerifyResult,
+  };
+}

src/hooks/useBridgeStatus.ts

@@ -0,0 +1,98 @@
+import { useState, useCallback, useEffect, useRef } from "react";
+
+interface AdapterStatus {
+  channelType: string;
+  running: boolean;
+  connectedAt: string | null;
+  lastMessageAt: string | null;
+  error: string | null;
+}
+
+interface BridgeStatus {
+  running: boolean;
+  startedAt: string | null;
+  adapters: AdapterStatus[];
+}
+
+/**
+ * Hook for polling bridge status and controlling bridge start/stop.
+ * Automatically polls every 5 seconds while the bridge is running.
+ */
+export function useBridgeStatus(): {
+  bridgeStatus: BridgeStatus | null;
+  starting: boolean;
+  stopping: boolean;
+  startBridge: () => Promise<void>;
+  stopBridge: () => Promise<void>;
+  refreshStatus: () => Promise<void>;
+} {
+  const [bridgeStatus, setBridgeStatus] = useState<BridgeStatus | null>(null);
+  const [starting, setStarting] = useState(false);
+  const [stopping, setStopping] = useState(false);
+  const pollRef = useRef<ReturnType<typeof setInterval> | null>(null);
+
+  const refreshStatus = useCallback(async () => {
+    try {
+      const res = await fetch("/api/bridge");
+      if (res.ok) {
+        const data = await res.json();
+        setBridgeStatus(data);
+      }
+    } catch {
+      // ignore
+    }
+  }, []);
+
+  useEffect(() => {
+    refreshStatus();
+  }, [refreshStatus]);
+
+  // Poll bridge status while bridge is running
+  useEffect(() => {
+    if (bridgeStatus?.running) {
+      pollRef.current = setInterval(refreshStatus, 5000);
+    } else if (pollRef.current) {
+      clearInterval(pollRef.current);
+      pollRef.current = null;
+    }
+    return () => {
+      if (pollRef.current) {
+        clearInterval(pollRef.current);
+      }
+    };
+  }, [bridgeStatus?.running, refreshStatus]);
+
+  const startBridge = useCallback(async () => {
+    setStarting(true);
+    try {
+      await fetch("/api/bridge", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ action: "start" }),
+      });
+      await refreshStatus();
+    } catch {
+      // ignore
+    } finally {
+      setStarting(false);
+    }
+  }, [refreshStatus]);
+
+  const stopBridge = useCallback(async () => {
+    setStopping(true);
+    try {
+      await fetch("/api/bridge", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ action: "stop" }),
+      });
+      await refreshStatus();
+    } catch {
+      // ignore
+    } finally {
+      setStopping(false);
+    }
+  }, [refreshStatus]);
+
+  return { bridgeStatus, starting, stopping, startBridge, stopBridge, refreshStatus };
+}

src/hooks/useSettings.ts

@@ -0,0 +1,58 @@
+import { useState, useCallback, useEffect } from "react";
+
+/**
+ * Generic hook for fetching and saving settings from an API endpoint.
+ * Handles loading/saving states and provides a clean CRUD interface.
+ */
+export function useSettings<T extends Record<string, string>>(
+  endpoint: string,
+  defaults: T
+): {
+  settings: T;
+  loading: boolean;
+  saving: boolean;
+  save: (updates: Partial<T>) => Promise<void>;
+  refresh: () => Promise<void>;
+} {
+  const [settings, setSettings] = useState<T>(defaults);
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+
+  const refresh = useCallback(async () => {
+    try {
+      const res = await fetch(endpoint);
+      if (res.ok) {
+        const data = await res.json();
+        setSettings({ ...defaults, ...data.settings });
+      }
+    } catch {
+      // ignore
+    } finally {
+      setLoading(false);
+    }
+  }, [endpoint, defaults]);
+
+  useEffect(() => {
+    refresh();
+  }, [refresh]);
+
+  const save = useCallback(async (updates: Partial<T>) => {
+    setSaving(true);
+    try {
+      const res = await fetch(endpoint, {
+        method: "PUT",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ settings: updates }),
+      });
+      if (res.ok) {
+        setSettings((prev) => ({ ...prev, ...updates }));
+      }
+    } catch {
+      // ignore
+    } finally {
+      setSaving(false);
+    }
+  }, [endpoint]);
+
+  return { settings, loading, saving, save, refresh };
+}