Add PainterPalette integration, canonical DB schema, and influence UI fixes.

Integrate Inputs/PainterPalette.csv for artist metadata and influence links, add db/schema.sql with server/migrate.js, letterbox influence panel thumbnails, and refresh Titian/Pontormo images.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/analyze-painter-palette.js

@@ -0,0 +1,27 @@
+require('dotenv').config();
+const pool = require('../server/db');
+const { loadPainterPalette, findPaletteRow } = require('./painter-palette-lib');
+
+async function main() {
+  const palette = loadPainterPalette();
+  const { rows: dbArtists } = await pool.query('SELECT name FROM artists ORDER BY name');
+
+  let matched = 0;
+  const unmatched = [];
+  for (const a of dbArtists) {
+    if (findPaletteRow(a.name, palette)) matched += 1;
+    else unmatched.push(a.name);
+  }
+
+  console.log('CSV rows:', palette.rowCount);
+  console.log('DB artists:', dbArtists.length);
+  console.log('Matched to PainterPalette:', matched, '/', dbArtists.length);
+  if (unmatched.length) console.log('Unmatched:', unmatched.join('; '));
+
+  await pool.end();
+}
+
+main().catch((err) => {
+  console.error(err);
+  process.exit(1);
+});