**Add Vitest support and migrate frontend tests**

- Added Vitest configuration (`vitest.config.mjs`) for frontend unit testing with a `jsdom` environment.
- Migrated and rewrote key frontend tests (`api.test.js`, `comiclist.test.js`, `comicreader.test.js`, `historytable.test.js`, `router.test.js`, `store.test.js`) to Vitest, improving maintainability.
- Removed `tsconfig.json` and related TypeScript loaders from `webpack` configurations (`webpack.dev.js`, `webpack.prod.js`).
- Adjusted `eslint.config.mjs` to support Vitest tests.
- Updated `package-lock.json` to include Vitest, test utilities (`jsdom`, `@vue/test-utils`), and other associated packages.
- Updated Nginx configuration for better compression on assets (`gzip` adjustments).
- Enhanced `entrypoint.sh` to include first-run library indexing (`--if-empty` argument).
- Simplified the `scan_comics` command with a dedicated test for empty database scans.

This transition improves testing workflows and backend/frontend synergy while removing unused TypeScript dependencies.

frontend/test/historytable.test.js

@@ -0,0 +1,107 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { flushPromises, mount } from '@vue/test-utils'
+
+const api = vi.hoisted(() => ({ get: vi.fn() }))
+
+vi.mock('@/api', () => ({ default: api }))
+
+import HistoryTable from '@/components/HistoryTable.vue'
+
+function mountTable() {
+  return mount(HistoryTable, { global: { stubs: { paginate: true, 'font-awesome-icon': true } } })
+}
+
+beforeEach(() => {
+  vi.useFakeTimers()
+  api.get.mockReset()
+  api.get.mockResolvedValue({ data: { count: 25, results: [{ id: 1, selector: 'a1', file_name: 'Alpha', last_read_time: new Date(), unread: false, finished: true, last_read_page: 3, page_count: 5 }] } })
+})
+
+afterEach(() => {
+  vi.useRealTimers()
+})
+
+describe('HistoryTable', () => {
+  it('requests the first page when it is mounted', async () => {
+    const wrapper = mountTable()
+    await flushPromises()
+
+    expect(api.get).toHaveBeenCalledWith('/api/history/', { params: { page: 1, page_size: 10 } })
+    expect(wrapper.text()).toContain('Finished')
+  })
+
+  it('works out how many pages the result count implies', async () => {
+    const wrapper = mountTable()
+    await flushPromises()
+
+    expect(wrapper.vm.page_count).toBe(3)
+
+    wrapper.vm.page_size = 25
+    wrapper.vm.setPage(2)
+    await flushPromises()
+
+    expect(api.get).toHaveBeenLastCalledWith('/api/history/', { params: { page: 2, page_size: 25 } })
+    expect(wrapper.vm.page_count).toBe(1)
+  })
+
+  it('includes the search text once there is one', async () => {
+    const wrapper = mountTable()
+    await flushPromises()
+
+    wrapper.vm.search_text = 'alpha'
+    wrapper.vm.setPage(1)
+    await flushPromises()
+
+    expect(api.get).toHaveBeenLastCalledWith('/api/history/', {
+      params: { page: 1, page_size: 10, search_text: 'alpha' },
+    })
+  })
+
+  it('debounces typing so one burst of keystrokes makes one request', async () => {
+    const wrapper = mountTable()
+    await flushPromises()
+    expect(api.get).toHaveBeenCalledTimes(1)
+
+    wrapper.vm.debounceInput()
+    wrapper.vm.debounceInput()
+    wrapper.vm.debounceInput()
+
+    vi.advanceTimersByTime(500)
+    await flushPromises()
+
+    expect(api.get).toHaveBeenCalledTimes(2)
+  })
+
+  it('does not fire a pending debounce after the table is removed', async () => {
+    const wrapper = mountTable()
+    await flushPromises()
+
+    wrapper.vm.debounceInput()
+    wrapper.unmount()
+
+    vi.advanceTimersByTime(1000)
+    await flushPromises()
+
+    expect(api.get).toHaveBeenCalledTimes(1)
+  })
+
+  it('goes back to page one when the page number is no longer valid', async () => {
+    api.get.mockRejectedValueOnce({ response: { data: { detail: 'Invalid page.' } } })
+
+    const wrapper = mountTable()
+    await flushPromises()
+
+    expect(wrapper.vm.page).toBe(1)
+    expect(api.get).toHaveBeenCalledTimes(2)
+  })
+
+  it('shows the reading status for each entry', async () => {
+    const wrapper = mountTable()
+    await flushPromises()
+
+    expect(wrapper.vm.get_status({ unread: true })).toBe('Unread')
+    expect(wrapper.vm.get_status({ unread: null })).toBe('Unread')
+    expect(wrapper.vm.get_status({ unread: false, finished: true })).toBe('Finished')
+    expect(wrapper.vm.get_status({ unread: false, finished: false, last_read_page: 2, page_count: 5 })).toBe('2 / 5')
+  })
+})