feat(stats): add alass sidecar retiming for sentence mining and fix timi

- Retime local English sidecars against the Japanese sidecar via alass before populating sentence card translation fields; cache retimed copies for the process lifetime
- Reject reversed or non-positive subtitle timings in immersion tracker and before media generation
- Fix word card mining so sentence audio goes to SentenceAudio (not ExpressionAudio) and English subtitle text is not written to SelectionText
- Consolidate 10 individual change fragments into stats-updates.md

stats/src/components/vocabulary/WordDetailPanel.test.ts

@@ -0,0 +1,25 @@
+import assert from 'node:assert/strict';
+import fs from 'node:fs';
+import path from 'node:path';
+import test from 'node:test';
+import { fileURLToPath } from 'node:url';
+
+const WORD_DETAIL_PANEL_PATH = path.resolve(
+  path.dirname(fileURLToPath(import.meta.url)),
+  'WordDetailPanel.tsx',
+);
+
+test('WordDetailPanel uses the shared stats mining payload builder', () => {
+  const source = fs.readFileSync(WORD_DETAIL_PANEL_PATH, 'utf8');
+
+  assert.match(source, /buildStatsMineCardParams/);
+  assert.match(source, /getStatsMineCardUnavailableReason/);
+  assert.match(source, /buildStatsMineCardParams\(\s*occ,\s*data!\.detail\.headword,\s*mode\s*\)/);
+});
+
+test('WordDetailPanel shows partial media mining errors instead of silent success', () => {
+  const source = fs.readFileSync(WORD_DETAIL_PANEL_PATH, 'utf8');
+
+  assert.match(source, /getStatsMineCardError/);
+  assert.match(source, /const responseError = getStatsMineCardError\(result\);/);
+});