eID Wallet: Reduce top spacing, show display name, and add edit button

[plansombl]

Description

Several cosmetic/UX improvements are needed on the eID Wallet home screen:

1. Excess top spacing — There is a large empty space at the top of the screen (above the greeting/name area). This should be made significantly shorter.
2. Wrong name source — The name displayed ("Vladimir Igorevich Posokhin") is being pulled from legal documents. It should instead use the display name entered during the registration process (right after creating a PIN).
3. Missing edit button — The Figma prototype included a pencil (edit) icon next to the name. This should be added so users can edit their display name directly from the wallet home screen.

Reference

Screenshot showing the excess top space (circled) and the current legal name being displayed:

Acceptance Criteria

• Top empty space above the greeting is visibly reduced / tightened
• The name shown on the wallet home screen is the display name from registration, not the legal name from documents
• A pencil/edit icon is present next to the display name, matching the Figma prototype
• Tapping the edit icon allows the user to update their display name

Desired Output (may vary)

A cleaner, more compact wallet home screen that shows the user's chosen display name with an accessible edit button, consistent with the Figma design.