fix: migrations, auth, providers health check, E2E tests, remove neko-sama

- Add proper Alembic initial migration (0001_initial_schema.py)
- Migrate refresh tokens from JSON file to SQLite (RefreshTokenTable)
- Remove Neko-Sama provider entirely (redirects to Gupy, not a host)
- Fix provider health check always showing UNKNOWN
  - Run check_all_health() on startup
  - Fix POST /providers/health/check background task bug
  - Add HTMX refresh after manual health check trigger
- Fix anime search relevance scoring with MIN_RELEVANCE_THRESHOLD=0.5
- Replace bare 'except:' with 'except Exception:' across codebase
- Add Playwright E2E test suite (12 tests, auth setup, helpers)
- Fix toast container blocking clicks via pointer-events: none
- Remove obsolete Jest/Vite test files and config
- Clean up obsolete test_watchlist scripts
- Update sonarr model comment for active providers

static/js/__tests__/auth-api.test.js

@@ -1,85 +0,0 @@
-import { describe, it, expect, beforeAll } from 'vitest';
-
-// Set up global window object for jsdom
-global.window = global.window || {};
-
-// Define skeleton functions for testing (same as in auth-api.js)
-const API_BASE = '/api';
-
-async function login(username, password) {
-  throw new Error('Not implemented yet');
-}
-
-async function register(username, password, email = null, full_name = null) {
-  throw new Error('Not implemented yet');
-}
-
-async function logout() {
-  throw new Error('Not implemented yet');
-}
-
-async function getMe(token) {
-  throw new Error('Not implemented yet');
-}
-
-// Set up window object
-window.authApi = {
-  login,
-  register,
-  logout,
-  getMe,
-};
-
-describe('authApi', () => {
-  describe('login function', () => {
-    it('should be a function', () => {
-      expect(typeof window.authApi.login).toBe('function');
-    });
-
-    it('should return a Promise', () => {
-      const result = window.authApi.login('test', 'test');
-      expect(result).toBeInstanceOf(Promise);
-    });
-  });
-
-  describe('register function', () => {
-    it('should be a function', () => {
-      expect(typeof window.authApi.register).toBe('function');
-    });
-
-    it('should return a Promise', () => {
-      const result = window.authApi.register('testuser', 'password123', null, null);
-      expect(result).toBeInstanceOf(Promise);
-    });
-
-    it('should handle optional parameters', async () => {
-      try {
-        await window.authApi.register('test', 'password');
-      } catch (e) {
-        expect(e.message).toBe('Not implemented yet');
-      }
-    });
-  });
-
-  describe('logout function', () => {
-    it('should be a function', () => {
-      expect(typeof window.authApi.logout).toBe('function');
-    });
-
-    it('should return a Promise', () => {
-      const result = window.authApi.logout();
-      expect(result).toBeInstanceOf(Promise);
-    });
-  });
-
-  describe('getMe function', () => {
-    it('should be a function', () => {
-      expect(typeof window.authApi.getMe).toBe('function');
-    });
-
-    it('should return a Promise', () => {
-      const result = window.authApi.getMe('fake-token');
-      expect(result).toBeInstanceOf(Promise);
-    });
-  });
-});

static/js/__tests__/auth-utils.test.js

@@ -1,80 +0,0 @@
-import { describe, it, expect, beforeEach } from 'vitest';
-
-// Mock DOM elements for displayError tests
-const mockDocument = () => {
-  const elements = {};
-  global.document = {
-    getElementById: (id) => elements[id] || null,
-  };
-  beforeEach(() => {
-    elements.authError = { 
-      textContent: '', 
-      classList: { 
-        add: () => {}, 
-        remove: () => {} 
-      } 
-    };
-    elements.authSuccess = { 
-      textContent: '', 
-      classList: { 
-        add: () => {}, 
-        remove: () => {} 
-      } 
-    };
-  });
-};
-
-describe('safeJsonParse', () => {
-  // Import the function - we'll need to make it work with Vitest
-  // For now, we'll define it inline for testing
-  const safeJsonParse = (text, fallback = null) => {
-    try {
-      if (text === undefined || text === null || text === '') {
-        return fallback;
-      }
-      return JSON.parse(text);
-    } catch (error) {
-      return fallback;
-    }
-  };
-
-  it('should parse valid JSON string', () => {
-    const result = safeJsonParse('{"key":"value"}');
-    expect(result).toEqual({ key: 'value' });
-  });
-
-  it('should return fallback for invalid JSON', () => {
-    const result = safeJsonParse('invalid json');
-    expect(result).toBeNull();
-  });
-
-  it('should return custom fallback when provided', () => {
-    const result = safeJsonParse('invalid', 'custom fallback');
-    expect(result).toBe('custom fallback');
-  });
-
-  it('should return fallback for undefined input', () => {
-    const result = safeJsonParse(undefined);
-    expect(result).toBeNull();
-  });
-
-  it('should return fallback for null input', () => {
-    const result = safeJsonParse(null);
-    expect(result).toBeNull();
-  });
-
-  it('should return fallback for empty string', () => {
-    const result = safeJsonParse('');
-    expect(result).toBeNull();
-  });
-
-  it('should parse valid JSON array', () => {
-    const result = safeJsonParse('[1, 2, 3]');
-    expect(result).toEqual([1, 2, 3]);
-  });
-
-  it('should parse nested JSON', () => {
-    const result = safeJsonParse('{"user":{"name":"John","age":30}}');
-    expect(result).toEqual({ user: { name: 'John', age: 30 } });
-  });
-});

static/js/__tests__/smoke.test.js

@@ -1,8 +0,0 @@
-// Smoke test to verify Vitest setup
-import { describe, it, expect } from 'vitest';
-
-describe('smoke', () => {
-  it('works', () => {
-    expect(true).toBe(true);
-  });
-});