Remove Settings and Setup pages along with their tests and related API services

- Deleted Settings.tsx and Setup.tsx pages, which included functionality for changing passwords and setting up an admin account.
- Removed associated test files for Setup page.
- Eliminated API service definitions related to proxy hosts, remote servers, import functionality, and health checks.
- Cleaned up mock data and test setup files.
- Removed configuration files for TypeScript, Vite, and Tailwind CSS.
- Deleted scripts for testing coverage, release management, Dockerfile validation, and Python compilation checks.
- Removed Sourcery pre-commit wrapper script.

frontend/src/api/import.ts

@@ -1,51 +0,0 @@
-import client from './client';
-
-export interface ImportSession {
-  id: string;
-  state: 'pending' | 'reviewing' | 'completed' | 'failed';
-  created_at: string;
-  updated_at: string;
-}
-
-export interface ImportPreview {
-  session: ImportSession;
-  preview: {
-    hosts: Array<{ domain_names: string; [key: string]: unknown }>;
-    conflicts: Record<string, string>;
-    errors: string[];
-  };
-}
-
-export const uploadCaddyfile = async (content: string): Promise<ImportPreview> => {
-  const { data } = await client.post<ImportPreview>('/import/upload', { content });
-  return data;
-};
-
-export const getImportPreview = async (): Promise<ImportPreview> => {
-  const { data } = await client.get<ImportPreview>('/import/preview');
-  return data;
-};
-
-export const commitImport = async (resolutions: Record<string, string>): Promise<void> => {
-  await client.post('/import/commit', { resolutions });
-};
-
-export const cancelImport = async (): Promise<void> => {
-  await client.post('/import/cancel');
-};
-
-export const getImportStatus = async (): Promise<{ has_pending: boolean; session?: ImportSession }> => {
-  // Note: Assuming there might be a status endpoint or we infer from preview.
-  // If no dedicated status endpoint exists in backend, we might rely on preview returning 404 or empty.
-  // Based on previous context, there wasn't an explicit status endpoint mentioned in the simple API,
-  // but the hook used `importAPI.status()`. I'll check the backend routes if needed.
-  // For now, I'll implement it assuming /import/preview can serve as status check or there is a /import/status.
-  // Let's check the backend routes to be sure.
-  try {
-    const { data } = await client.get<{ has_pending: boolean; session?: ImportSession }>('/import/status');
-    return data;
-  } catch (error) {
-    // Fallback if status endpoint doesn't exist, though the hook used it.
-    return { has_pending: false };
-  }
-};