```

Add handwriting OCR pipeline and update documentation

- Introduce full OCR workflow: HWR extraction → PNG rendering → GLM-OCR → Ollama refinement
- Add new modules for page rendering, GLM-OCR client, style refinement, and ZIP utilities
- Update settings with drawj2d path and batch size controls
- Document Phase 2 completion and known limitations in IMPLEMENTATION.md
- Validate dependencies and handle cross-platform temp directory cleanup
  ```

src/ocr/glmocr-client.ts

@@ -0,0 +1,64 @@
+import { GlmOcrResponse } from "../types";
+import RemarkablePlugin from "../main";
+import { runCommand } from "../utils/process";
+
+export class GlmOcrClient {
+  plugin: RemarkablePlugin;
+
+  constructor(plugin: RemarkablePlugin) {
+    this.plugin = plugin;
+  }
+
+  /**
+   * Send PNG images to the GLM-OCR server and receive markdown.
+   */
+  async parseImages(pngPaths: string[]): Promise<GlmOcrResponse> {
+    const url = `${this.plugin.settings.glmocrServerUrl}/glmocr/parse`;
+
+    // Build the request body with base64-encoded images
+    const images: string[] = [];
+    for (const pngPath of pngPaths) {
+      const base64 = await this.fileToBase64(pngPath);
+      images.push(`data:image/png;base64,${base64}`);
+    }
+
+    const body = JSON.stringify({ images });
+
+    // Use curl for the HTTP request (available on all platforms)
+    const args = [
+      "-s", // silent
+      "-X",
+      "POST",
+      "-H",
+      "Content-Type: application/json",
+      "--max-time",
+      "60", // 60-second timeout
+      "-d",
+      body,
+      url,
+    ];
+
+    const { stdout, stderr, code } = await runCommand("curl", args);
+    if (code !== 0) {
+      throw new Error(`GLM-OCR request failed: ${stderr || stdout}`);
+    }
+
+    try {
+      const response = JSON.parse(stdout) as GlmOcrResponse;
+      return response;
+    } catch (e) {
+      throw new Error(`Failed to parse GLM-OCR response: ${e}\nRaw: ${stdout}`);
+    }
+  }
+
+  /**
+   * Convert a file to base64 string.
+   */
+  private async fileToBase64(path: string): Promise<string> {
+    const { stdout, code, stderr } = await runCommand("base64", ["-w", "0", path]);
+    if (code !== 0) {
+      throw new Error(`base64 encoding failed: ${stderr}`);
+    }
+    return stdout.trim();
+  }
+}