diff --git a/src/frontend/src/hooks/useApi.ts b/src/frontend/src/hooks/useApi.ts
deleted file mode 100644
index 0bc85e6..0000000
--- a/src/frontend/src/hooks/useApi.ts
+++ /dev/null
@@ -1,84 +0,0 @@
-// 自定义 hooks
-
-import { useState, useEffect, useCallback, useRef } from 'react';
-import * as api from '../api';
-import type { Task, Project, DaemonStatus } from '../types';
-
-export function useProjects() {
-  const [projects, setProjects] = useState<Project[]>([]);
-  const [loading, setLoading] = useState(true);
-  const [error, setError] = useState<string | null>(null);
-
-  const refresh = useCallback(async () => {
-    try {
-      setLoading(true);
-      const data = await api.listProjects();
-      setProjects(data);
-      setError(null);
-    } catch (e) {
-      setError(String(e));
-    } finally {
-      setLoading(false);
-    }
-  }, []);
-
-  useEffect(() => { refresh(); }, [refresh]);
-  return { projects, loading, error, refresh };
-}
-
-export function useTasks(projectId: string | null) {
-  const [tasks, setTasks] = useState<Task[]>([]);
-  const [loading, setLoading] = useState(true);
-  const [error, setError] = useState<string | null>(null);
-
-  const refresh = useCallback(async () => {
-    if (!projectId) return;
-    try {
-      setLoading(true);
-      const data = await api.listTasks(projectId);
-      setTasks(data);
-      setError(null);
-    } catch (e) {
-      setError(String(e));
-    } finally {
-      setLoading(false);
-    }
-  }, [projectId]);
-
-  useEffect(() => { refresh(); }, [refresh]);
-  return { tasks, loading, error, refresh };
-}
-
-export function useDaemonStatus() {
-  const [status, setStatus] = useState<DaemonStatus | null>(null);
-
-  const refresh = useCallback(async () => {
-    try {
-      const data = await api.getDaemonStatus();
-      setStatus(data);
-    } catch {
-      // Daemon may not be running
-    }
-  }, []);
-
-  useEffect(() => {
-    refresh();
-    const interval = setInterval(refresh, 10000);
-    return () => clearInterval(interval);
-  }, [refresh]);
-
-  return { status, refresh };
-}
-
-export function useSSE(onEvent: (data: unknown) => void) {
-  const esRef = useRef<EventSource | null>(null);
-
-  useEffect(() => {
-    esRef.current = api.createEventSource(onEvent, () => {
-      // Auto-reconnect is handled by EventSource
-    });
-    return () => {
-      esRef.current?.close();
-    };
-  }, [onEvent]);
-}
diff --git a/src/frontend/src/types.ts b/src/frontend/src/types.ts
deleted file mode 100644
index 853de1a..0000000
--- a/src/frontend/src/types.ts
+++ /dev/null
@@ -1,81 +0,0 @@
-// API 类型定义
-
-export interface Task {
-  id: string;
-  title: string;
-  description: string | null;
-  status: string;
-  assignee: string | null;
-  assigned_by: string;
-  depends_on: string | null;
-  priority: number;
-  task_type: string | null;
-  risk_level: string | null;
-  must_haves: string | null;
-  output_path: string | null;
-  result_summary: string | null;
-  retry_count: number;
-  max_retries: number;
-  created_at: string | null;
-  updated_at: string | null;
-  completed_at: string | null;
-}
-
-export interface Project {
-  id: string;
-  name: string;
-  description: string | null;
-  status: string;
-  config: string | null;
-  created_at: string | null;
-  updated_at: string | null;
-}
-
-export interface Observation {
-  id: number;
-  task_id: string | null;
-  observer: string;
-  severity: string;
-  body: string;
-  resolved_by: string | null;
-  created_at: string | null;
-}
-
-export interface Event {
-  id: number | null;
-  task_id: string | null;
-  agent: string | null;
-  event_type: string;
-  detail: string | null;
-  created_at: string | null;
-}
-
-export interface DaemonStatus {
-  status: string;
-  tick_count: number;
-  uptime_seconds: number;
-  active_projects: number;
-  last_tick: string | null;
-}
-
-export interface ReviewResult {
-  verdict: string;
-  score: number;
-  gate: string;
-  needs_human: boolean;
-  results: ReviewStepResult[];
-}
-
-export interface ReviewStepResult {
-  step: string;
-  verdict: string;
-  score: number;
-  details: string;
-  suggestions: string[];
-}
-
-export type SSEEventData = {
-  event_type: string;
-  task_id?: string;
-  [key: string]: unknown;
-};