[Bug]: Large empty space after line number in text boxes

[madhav165]

🐞 Bug Summary

Text boxes in Resource and Prompt addition screens have a large empty space when copy pasting content.
Line numbers are deleted with backspace. That is not expected.

---

🧩 Affected Component

Select the area of the project impacted:

• mcpgateway - API
• mcpgateway - UI (admin panel)
• mcpgateway.wrapper - stdio wrapper
• Federation or Transports
• CLI, Makefiles, or shell scripts
• Container setup (Docker/Podman/Compose)
• Other (explain below)

---

🔁 Steps to Reproduce

1. Go to Prompts/Resources screen
2. Paste content in content or template sections. There is a large space after the number 1
3. Press backspace - extra spaces are removed along with line number

---

🤔 Expected Behavior

1. The text boxes should start showing text at left end
2. The line numbers should not be deleted with backspace

---