feat: fetch-novel builds an EPUB from any plugin; Kavita TOC fix

- scripts/load-plugins.js: shared plugin loader for the novel CLI scripts
- scripts/fetch-novel.js: download a novel via its plugin into a clean EPUB 3
- find-novel prints the plugin id/path for each match
- kavita 1.0.1: innermost TOC entry names the chapter

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/load-plugins.js

@@ -0,0 +1,68 @@
+// Load compiled plugin instances outside the app, for the novel CLI scripts.
+import * as esbuild from 'esbuild';
+import { execFileSync } from 'child_process';
+import { createRequire } from 'module';
+import { fileURLToPath } from 'url';
+import path, { dirname } from 'path';
+import fs from 'fs';
+import os from 'os';
+
+const require = createRequire(import.meta.url);
+export const ROOT = path.resolve(dirname(fileURLToPath(import.meta.url)), '..');
+
+// The shared fetch helper logs every request with its headers (credentials
+// included). Callers print their output explicitly with `print`.
+export const print = (...args) => process.stdout.write(args.join(' ') + '\n');
+console.log = () => undefined;
+
+/** Bundle and instantiate every plugin in the given language folders. */
+export async function loadPlugins(langs) {
+  // Multisrc plugins (Madara, NovelFire, ...) are generated, not committed.
+  execFileSync('node', ['plugins/multisrc/generate-multisrc-plugins.js'], {
+    cwd: ROOT,
+    stdio: 'ignore',
+  });
+
+  const entryPoints = langs.flatMap(lang => {
+    const dir = path.join(ROOT, 'plugins', lang);
+    if (!fs.existsSync(dir))
+      throw new Error(`No plugin folder: plugins/${lang}`);
+    return fs
+      .readdirSync(dir)
+      .filter(f => f.endsWith('.ts'))
+      .map(f => path.join(dir, f));
+  });
+
+  const outdir = fs.mkdtempSync(path.join(os.tmpdir(), 'novel-plugins-'));
+  try {
+    const result = await esbuild.build({
+      entryPoints,
+      outdir,
+      bundle: true,
+      platform: 'node',
+      format: 'cjs',
+      target: 'node22',
+      outExtension: { '.js': '.cjs' },
+      logLevel: 'silent',
+      alias: {
+        '@libs': path.join(ROOT, 'src/libs'),
+        '@': path.join(ROOT, 'src'),
+      },
+    });
+    if (result.errors.length) throw new Error('Plugin bundling failed');
+
+    const plugins = [];
+    for (const file of fs.readdirSync(outdir, { recursive: true })) {
+      if (!file.endsWith('.cjs')) continue;
+      try {
+        const mod = require(path.join(outdir, file));
+        plugins.push(mod.default ?? mod);
+      } catch {
+        // A plugin that throws on load is skipped, like a broken source in the app.
+      }
+    }
+    return plugins;
+  } finally {
+    fs.rmSync(outdir, { recursive: true, force: true });
+  }
+}