Add missing frontend lib files

Fixes #7

- Add frontend/src/lib/auth.tsx with AuthProvider and useAuth hook
- Add frontend/src/lib/api.ts with chat, getKBStats, listDocuments, etc.
- Add frontend/src/lib/filePicker.ts with path utilities
- Update .gitignore to not ignore frontend/src/lib/

These files were imported but never committed, preventing fresh
installations from building the frontend.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.gitignore

@@ -12,6 +12,7 @@ eggs/
 .eggs/
 lib/
 lib64/
+!frontend/src/lib/
 parts/
 sdist/
 var/

frontend/src/lib/api.ts

@@ -0,0 +1,88 @@
+const API_BASE = 'http://localhost:8051';
+
+export interface ChatResponse {
+  response: string;
+  sources?: Array<{
+    filename: string;
+    content: string;
+    score: number;
+  }>;
+  thinking_time?: number;
+}
+
+export interface KBStats {
+  document_count: number;
+  chunk_count: number;
+  last_updated?: string;
+  total_size?: number;
+}
+
+export interface Document {
+  filename: string;
+  chunk_count: number;
+  created_at?: string;
+}
+
+export async function chat(
+  kbName: string,
+  query: string,
+  options?: { useHybrid?: boolean; useRerank?: boolean; useAgentic?: boolean }
+): Promise<ChatResponse> {
+  const res = await fetch(`${API_BASE}/api/kb/${kbName}/chat`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({
+      query,
+      use_hybrid: options?.useHybrid ?? false,
+      use_rerank: options?.useRerank ?? false,
+      use_agentic: options?.useAgentic ?? false,
+    }),
+  });
+
+  if (!res.ok) {
+    throw new Error(`Chat failed: ${res.statusText}`);
+  }
+
+  return res.json();
+}
+
+export async function getKBStats(kbName: string): Promise<KBStats> {
+  const res = await fetch(`${API_BASE}/api/kb/${kbName}/stats`);
+  if (!res.ok) {
+    throw new Error(`Failed to get KB stats: ${res.statusText}`);
+  }
+  return res.json();
+}
+
+export async function listDocuments(kbName: string): Promise<Document[]> {
+  const res = await fetch(`${API_BASE}/api/kb/${kbName}/documents`);
+  if (!res.ok) {
+    throw new Error(`Failed to list documents: ${res.statusText}`);
+  }
+  const data = await res.json();
+  return data.documents || [];
+}
+
+export async function uploadDocument(kbName: string, file: File): Promise<void> {
+  const formData = new FormData();
+  formData.append('file', file);
+
+  const res = await fetch(`${API_BASE}/api/kb/${kbName}/upload`, {
+    method: 'POST',
+    body: formData,
+  });
+
+  if (!res.ok) {
+    throw new Error(`Failed to upload document: ${res.statusText}`);
+  }
+}
+
+export async function deleteDocument(kbName: string, filename: string): Promise<void> {
+  const res = await fetch(`${API_BASE}/api/kb/${kbName}/documents/${encodeURIComponent(filename)}`, {
+    method: 'DELETE',
+  });
+
+  if (!res.ok) {
+    throw new Error(`Failed to delete document: ${res.statusText}`);
+  }
+}

frontend/src/lib/auth.tsx

@@ -0,0 +1,102 @@
+import { createContext, useContext, useState, useEffect, ReactNode } from 'react';
+
+const API_BASE = 'http://localhost:8051';
+
+interface AuthContextType {
+  isAuthenticated: boolean;
+  isAuthEnabled: boolean;
+  isLoading: boolean;
+  user: { email: string } | null;
+  login: (email: string, password: string) => Promise<void>;
+  logout: () => void;
+}
+
+const AuthContext = createContext<AuthContextType | undefined>(undefined);
+
+export function AuthProvider({ children }: { children: ReactNode }) {
+  const [isAuthenticated, setIsAuthenticated] = useState(false);
+  const [isAuthEnabled, setIsAuthEnabled] = useState(true);
+  const [isLoading, setIsLoading] = useState(true);
+  const [user, setUser] = useState<{ email: string } | null>(null);
+
+  useEffect(() => {
+    checkAuthStatus();
+  }, []);
+
+  const checkAuthStatus = async () => {
+    try {
+      // Check if auth is enabled
+      const statusRes = await fetch(`${API_BASE}/api/auth/status`);
+      if (statusRes.ok) {
+        const statusData = await statusRes.json();
+        setIsAuthEnabled(statusData.auth_enabled);
+
+        if (!statusData.auth_enabled) {
+          setIsAuthenticated(true);
+          setIsLoading(false);
+          return;
+        }
+      }
+
+      // Check if user is already logged in
+      const token = localStorage.getItem('auth_token');
+      if (token) {
+        const meRes = await fetch(`${API_BASE}/api/auth/me`, {
+          headers: { Authorization: `Bearer ${token}` }
+        });
+        if (meRes.ok) {
+          const userData = await meRes.json();
+          setUser(userData);
+          setIsAuthenticated(true);
+        } else {
+          localStorage.removeItem('auth_token');
+        }
+      }
+    } catch (error) {
+      // If we can't reach the server, assume auth is disabled for local dev
+      console.warn('Could not check auth status:', error);
+      setIsAuthEnabled(false);
+      setIsAuthenticated(true);
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  const login = async (email: string, password: string) => {
+    const res = await fetch(`${API_BASE}/api/auth/login`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ email, password })
+    });
+
+    if (!res.ok) {
+      const error = await res.json();
+      throw new Error(error.detail || 'Login failed');
+    }
+
+    const data = await res.json();
+    localStorage.setItem('auth_token', data.access_token);
+    setUser({ email });
+    setIsAuthenticated(true);
+  };
+
+  const logout = () => {
+    localStorage.removeItem('auth_token');
+    setUser(null);
+    setIsAuthenticated(false);
+  };
+
+  return (
+    <AuthContext.Provider value={{ isAuthenticated, isAuthEnabled, isLoading, user, login, logout }}>
+      {children}
+    </AuthContext.Provider>
+  );
+}
+
+export function useAuth() {
+  const context = useContext(AuthContext);
+  if (context === undefined) {
+    throw new Error('useAuth must be used within an AuthProvider');
+  }
+  return context;
+}

frontend/src/lib/filePicker.ts

@@ -0,0 +1,36 @@
+export interface CommonPath {
+  label: string;
+  path: string;
+  description?: string;
+}
+
+export function getCommonProjectPaths(): CommonPath[] {
+  return [
+    { label: 'Home', path: '~', description: 'Your home directory' },
+    { label: 'Documents', path: '~/Documents', description: 'Documents folder' },
+    { label: 'Projects', path: '~/Projects', description: 'Common projects folder' },
+    { label: 'Sites', path: '~/sites', description: 'Web projects' },
+    { label: 'Code', path: '~/code', description: 'Code repositories' },
+    { label: 'Desktop', path: '~/Desktop', description: 'Desktop folder' },
+  ];
+}
+
+export function formatPathForDisplay(path: string): string {
+  if (!path) return '';
+
+  // Replace home directory with ~
+  const homeDir = '/home/' + (typeof window !== 'undefined' ? 'user' : 'user');
+  if (path.startsWith(homeDir)) {
+    return path.replace(homeDir, '~');
+  }
+
+  // Shorten long paths
+  if (path.length > 50) {
+    const parts = path.split('/');
+    if (parts.length > 4) {
+      return `${parts[0]}/${parts[1]}/.../${parts[parts.length - 2]}/${parts[parts.length - 1]}`;
+    }
+  }
+
+  return path;
+}