[US-09]Contacts are shared when swap is accepted

[ChatGPT486]

Field	Details
As a	User whose swap was accepted
I want to	Receive the other user's contact details automatically
So that	We can arrange the physical exchange of items
Story Points	3
Sprint	Sprint 2
Priority	High

Acceptance Criteria:

• Contact details are shared with both users on acceptance
• Details shown include name, phone or email
• Contact info is only visible after acceptance
• Both users see a confirmation screen with next steps
• Contact details are accessible later in swap history

Labels: priority: high | type: user-story | sprint-2
Milestone: Sprint 2 — Marketplace & Swap Flow