Fix the issue where the backup prompt cannot be imported.

What’s New in Prompt Manager Pro 1.3
New features

Color star marks — Mark each prompt with a star; click to cycle Blue → Yellow → Green → Red → Clear
UI zoom — Scale the whole popup from 20% to 500% (steps of 10%); default 100%
Display count — Choose how many prompts to show at once: 10 / 20 / 50 or a custom number (1–100)
Settings are remembered — Zoom and display count are saved automatically
Multilingual UI — Follows the browser language: English, Japanese, German, Spanish, French, Italian, Dutch, Portuguese, Korean, Traditional Chinese, Simplified Chinese
Wider AI site support — Paste into more chat boxes, including Claude, DeepSeek, Grok, Kimi, Doubao, Tongyi/Qwen, Yuanbao, Zhipu, Baichuan, StepFun, Hailuo, Mistral, Meta AI, Perplexity, Copilot, Poe, and more
Improvements & fixes

More reliable paste into ChatGPT and other editors (formatting / line breaks better preserved)
Better handling of React-controlled textareas (e.g. DeepSeek, Grok)
Visual “Copied!” feedback when you click a prompt
Cleaner Facebook-style light blue UI, tighter layout, and a thinner scrollbar
More compact action icons so titles have more room
Smaller, clearer delete confirmation dialog