feat: improve stats dashboard and annotation settings

stats/src/components/vocabulary/FrequencyRankTable.tsx

@@ -0,0 +1,139 @@
+import { useMemo, useState } from 'react';
+import { PosBadge } from './pos-helpers';
+import type { VocabularyEntry } from '../../types/stats';
+
+interface FrequencyRankTableProps {
+  words: VocabularyEntry[];
+  knownWords: Set<string>;
+  onSelectWord?: (word: VocabularyEntry) => void;
+}
+
+const PAGE_SIZE = 25;
+
+export function FrequencyRankTable({ words, knownWords, onSelectWord }: FrequencyRankTableProps) {
+  const [page, setPage] = useState(0);
+  const [hideKnown, setHideKnown] = useState(true);
+
+  const hasKnownData = knownWords.size > 0;
+
+  const isWordKnown = (w: VocabularyEntry): boolean => {
+    return knownWords.has(w.headword) || knownWords.has(w.word) || knownWords.has(w.reading);
+  };
+
+  const ranked = useMemo(() => {
+    let filtered = words.filter((w) => w.frequencyRank != null && w.frequencyRank > 0);
+    if (hideKnown && hasKnownData) {
+      filtered = filtered.filter((w) => !isWordKnown(w));
+    }
+    return filtered.sort((a, b) => a.frequencyRank! - b.frequencyRank!);
+  }, [words, knownWords, hideKnown, hasKnownData]);
+
+  if (words.every((w) => w.frequencyRank == null)) {
+    return (
+      <div className="bg-ctp-surface0 border border-ctp-surface1 rounded-lg p-4">
+        <h3 className="text-sm font-semibold text-ctp-text mb-2">Most Common Words Seen</h3>
+        <div className="text-xs text-ctp-overlay2">
+          No frequency rank data available. Run the frequency backfill script or install a frequency dictionary.
+        </div>
+      </div>
+    );
+  }
+
+  const totalPages = Math.ceil(ranked.length / PAGE_SIZE);
+  const paged = ranked.slice(page * PAGE_SIZE, (page + 1) * PAGE_SIZE);
+
+  return (
+    <div className="bg-ctp-surface0 border border-ctp-surface1 rounded-lg p-4">
+      <div className="flex items-center justify-between mb-3">
+        <h3 className="text-sm font-semibold text-ctp-text">
+          {hideKnown && hasKnownData ? 'Common Words Not Yet Mined' : 'Most Common Words Seen'}
+        </h3>
+        <div className="flex items-center gap-3">
+          {hasKnownData && (
+            <button
+              type="button"
+              onClick={() => { setHideKnown(!hideKnown); setPage(0); }}
+              className={`px-2.5 py-1 rounded-lg text-xs transition-colors border ${
+                hideKnown
+                  ? 'bg-ctp-surface2 text-ctp-text border-ctp-blue/50'
+                  : 'bg-ctp-surface0 text-ctp-overlay2 border-ctp-surface1 hover:text-ctp-subtext0'
+              }`}
+            >
+              Hide Known
+            </button>
+          )}
+          <span className="text-xs text-ctp-overlay2">
+            {ranked.length} words
+          </span>
+        </div>
+      </div>
+      {ranked.length === 0 ? (
+        <div className="text-xs text-ctp-overlay2">
+          {hideKnown ? 'All ranked words are already in Anki!' : 'No words with frequency data.'}
+        </div>
+      ) : (
+        <>
+          <div className="overflow-x-auto">
+            <table className="w-full text-sm">
+              <thead>
+                <tr className="text-xs text-ctp-overlay2 border-b border-ctp-surface1">
+                  <th className="text-left py-2 pr-3 font-medium w-16">Rank</th>
+                  <th className="text-left py-2 pr-3 font-medium">Word</th>
+                  <th className="text-left py-2 pr-3 font-medium">Reading</th>
+                  <th className="text-left py-2 pr-3 font-medium w-20">POS</th>
+                  <th className="text-right py-2 font-medium w-20">Seen</th>
+                </tr>
+              </thead>
+              <tbody>
+                {paged.map((w) => (
+                  <tr
+                    key={w.wordId}
+                    onClick={() => onSelectWord?.(w)}
+                    className="border-b border-ctp-surface1 last:border-0 cursor-pointer hover:bg-ctp-surface1/50 transition-colors"
+                  >
+                    <td className="py-1.5 pr-3 font-mono tabular-nums text-ctp-peach text-xs">
+                      #{w.frequencyRank!.toLocaleString()}
+                    </td>
+                    <td className="py-1.5 pr-3 text-ctp-text font-medium">
+                      {w.headword}
+                    </td>
+                    <td className="py-1.5 pr-3 text-ctp-subtext0">
+                      {w.reading !== w.headword ? w.reading : ''}
+                    </td>
+                    <td className="py-1.5 pr-3">
+                      {w.partOfSpeech && <PosBadge pos={w.partOfSpeech} />}
+                    </td>
+                    <td className="py-1.5 text-right font-mono tabular-nums text-ctp-blue text-xs">
+                      {w.frequency}x
+                    </td>
+                  </tr>
+                ))}
+              </tbody>
+            </table>
+          </div>
+          {totalPages > 1 && (
+            <div className="flex items-center justify-center gap-3 mt-3 text-xs">
+              <button
+                type="button"
+                disabled={page === 0}
+                onClick={() => setPage(page - 1)}
+                className="px-2 py-1 rounded bg-ctp-surface1 text-ctp-text disabled:opacity-30 hover:bg-ctp-surface2 transition-colors"
+              >
+                Prev
+              </button>
+              <span className="text-ctp-overlay2">{page + 1} / {totalPages}</span>
+              <button
+                type="button"
+                disabled={page >= totalPages - 1}
+                onClick={() => setPage(page + 1)}
+                className="px-2 py-1 rounded bg-ctp-surface1 text-ctp-text disabled:opacity-30 hover:bg-ctp-surface2 transition-colors"
+              >
+                Next
+              </button>
+            </div>
+          )}
+        </>
+      )}
+    </div>
+  );
+}