Fix Friends & Social member search; purge all account data on deletion

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DjMbLQujBHunCCu5GpsHaT

crates/shared/src/lib.rs

@@ -593,6 +593,9 @@ pub struct MemberProfile {
     pub last_seen: Option<String>,
     pub online: bool,
     pub is_friend: bool,
+    /// `none`, `accepted`, `pending_outgoing` or `pending_incoming`.
+    #[serde(default)]
+    pub friendship_status: String,
 }
 
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