Feature request: allow pasting certificate/key PEM content directly in the Custom Certificate modal

Feature request

Please add support for directly pasting PEM content in the Custom Certificate modal, instead of requiring file selection from the local machine.

Current behavior

When creating a custom certificate, users are expected to upload files for:

• Certificate
• Certificate Key
• (Optional) Intermediate Certificate

In some environments (remote browser sessions, mobile devices, thin clients), choosing local files is inconvenient or not possible.

Requested behavior

In addition to existing file upload inputs, provide text areas to paste:

• Certificate PEM
• Private Key PEM
• Intermediate Certificate PEM (optional)

Either input method should work:

• file upload, or
• pasted text

Why this helps

• Better usability in remote/admin workflows
• Works on devices without easy file access
• Faster copy/paste from secret managers or vault tools

Backward compatibility

Keep existing file-upload behavior unchanged; this should be additive only.

Thanks!

Start at the Custom Certificate modal and inspect the existing Certificate, Certificate Key, and optional Intermediate Certificate file inputs. Trace how those inputs are submitted, then verify that pasted PEM text and file uploads each work independently while preserving the existing upload behavior.