feat(stats): add stats server, API endpoints, config, and Anki integration

- Hono HTTP server with 20+ REST endpoints for stats data
- Stats overlay BrowserWindow with toggle keybinding
- IPC channel definitions and preload bridge
- Stats config section (toggleKey, serverPort, autoStartServer, autoOpenBrowser)
- Config resolver for stats section
- AnkiConnect proxy endpoints (guiBrowse, notesInfo)
- Note ID passthrough in card mining callback chain
- Stats CLI command with autoOpenBrowser respect

src/anki-integration/polling.test.ts

@@ -0,0 +1,35 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import { PollingRunner } from './polling';
+
+test('polling runner records newly added cards after initialization', async () => {
+  const recordedCards: number[] = [];
+  let tracked = new Set<number>();
+  const responses = [[10, 11], [10, 11, 12, 13]];
+  const runner = new PollingRunner({
+    getDeck: () => 'Mining',
+    getPollingRate: () => 250,
+    findNotes: async () => responses.shift() ?? [],
+    shouldAutoUpdateNewCards: () => true,
+    processNewCard: async () => undefined,
+    recordCardsAdded: (count) => {
+      recordedCards.push(count);
+    },
+    isUpdateInProgress: () => false,
+    setUpdateInProgress: () => undefined,
+    getTrackedNoteIds: () => tracked,
+    setTrackedNoteIds: (noteIds) => {
+      tracked = noteIds;
+    },
+    showStatusNotification: () => undefined,
+    logDebug: () => undefined,
+    logInfo: () => undefined,
+    logWarn: () => undefined,
+  });
+
+  await runner.pollOnce();
+  await runner.pollOnce();
+
+  assert.deepEqual(recordedCards, [2]);
+});