feat: add folder-level batch summarization command

Register parallel-reader-batch-generate command. It prompts the user for a
folder path via a Modal, finds all .md files in that folder (non-recursive),
skips files whose cache is still valid, and runs runForFile() sequentially
on the rest, showing per-file progress notices. Add i18n keys for the new
UI strings in both zh and en.

https://claude.ai/code/session_016QvEfqw6YZ3RjwBHrJ4w8S

main.ts

@@ -1,5 +1,5 @@
 'use strict';
-import { MarkdownView, Notice, Plugin, requestUrl, TFile } from 'obsidian';
+import { MarkdownView, Modal, Notice, Plugin, requestUrl, TFile } from 'obsidian';
 import { findLineForAnchor } from './src/anchor';
 import { serializeCacheFile, shouldConfirmRegenerate, touchCacheEntry } from './src/cache';
 import { CacheManager } from './src/cache-manager';
@@ -208,6 +208,11 @@ class ParallelReaderPlugin extends Plugin {
       name: this.t('cmdCardJump'),
       callback: () => this.jumpActiveCard(),
     });
+    this.addCommand({
+      id: 'parallel-reader-batch-generate',
+      name: this.t('cmdBatchGenerate'),
+      callback: () => this.runBatchForFolder(),
+    });
 
     this.addSettingTab(new ParallelReaderSettingTab(this.app, this));
 
@@ -551,6 +556,57 @@ class ParallelReaderPlugin extends Plugin {
       });
   }
 
+  async runBatchForFolder() {
+    const plugin = this;
+    const folderPath = await new Promise<string | null>((resolve) => {
+      class FolderPromptModal extends Modal {
+        private input!: HTMLInputElement;
+        onOpen() {
+          this.contentEl.createEl('p', { text: plugin.t('batchSelectFolder') });
+          this.input = this.contentEl.createEl('input', { type: 'text' });
+          this.input.placeholder = plugin.t('batchFolderPrompt');
+          this.input.style.width = '100%';
+          this.input.addEventListener('keydown', (e) => {
+            if (e.key === 'Enter') {
+              resolve(this.input.value.trim());
+              this.close();
+            }
+          });
+          this.contentEl.createEl('button', { text: 'OK' }).addEventListener('click', () => {
+            resolve(this.input.value.trim());
+            this.close();
+          });
+        }
+        onClose() {
+          resolve(null);
+        }
+      }
+      new FolderPromptModal(plugin.app).open();
+    });
+    if (folderPath === null) return;
+    const allFiles = this.app.vault.getMarkdownFiles().filter((f) => {
+      if (folderPath === '') return !f.path.includes('/');
+      return f.parent?.path === folderPath;
+    });
+    if (allFiles.length === 0) {
+      new Notice(this.t('batchNoMarkdown'));
+      return;
+    }
+    let skipped = 0;
+    for (let i = 0; i < allFiles.length; i++) {
+      const file = allFiles[i];
+      new Notice(this.t('batchProgress', { current: i + 1, total: allFiles.length }));
+      const content = await this.app.vault.read(file);
+      const entry = this.cacheManager.get(file.path);
+      if (entry && cacheEntryMatches(entry, content, this.settings)) {
+        skipped++;
+        continue;
+      }
+      await this.runForFile(file, false);
+    }
+    new Notice(this.t('batchDone', { total: allFiles.length, skipped }));
+  }
+
   resolveCardAnchors(content: string, rawCards: RawCard[]) {
     const resolved: ResolvedCard[] = (rawCards || []).map((c: RawCard) => ({
       title: c.title,

src/i18n.ts

@@ -145,6 +145,12 @@ export const STRINGS: Record<string, Record<string, string>> = {
     clearAllCacheButton: '清除所有缓存',
     settingStreamingName: '流式输出',
     settingStreamingDesc: '启用后生成时实时显示 LLM 输出进度（仅 OpenAI Chat 和 Anthropic 格式支持）',
+    cmdBatchGenerate: '批量生成对照笔记（当前文件夹）',
+    batchSelectFolder: '请输入要批量处理的文件夹路径（留空为 Vault 根目录）',
+    batchFolderPrompt: '文件夹路径',
+    batchNoMarkdown: '该文件夹下没有 Markdown 文件',
+    batchProgress: '批量生成：{current}/{total}',
+    batchDone: '批量生成完成：共处理 {total} 篇，跳过缓存 {skipped} 篇',
   },
   en: {
     appTitle: 'Parallel Reader',
@@ -295,6 +301,12 @@ export const STRINGS: Record<string, Record<string, string>> = {
     settingStreamingName: 'Streaming output',
     settingStreamingDesc:
       'Show real-time LLM output progress during generation (OpenAI Chat and Anthropic formats only)',
+    cmdBatchGenerate: 'Batch generate parallel notes (current folder)',
+    batchSelectFolder: 'Enter the folder path to batch-process (leave blank for Vault root)',
+    batchFolderPrompt: 'Folder path',
+    batchNoMarkdown: 'No Markdown files found in that folder',
+    batchProgress: 'Batch generating: {current}/{total}',
+    batchDone: 'Batch complete: processed {total}, skipped {skipped} (cached)',
   },
 };