feat(cloud): show Tor/FIPS transport pill on peer browse (B21)

content.browse-peer now returns the transport that actually reached the
peer (fips/tor/mesh/lan). PeerFiles shows it as a small coloured pill next
to the peer name (FIPS/Mesh green, LAN blue, Tor amber) and the loading
text no longer hardcodes "Connecting via Tor" (it was misleading when FIPS
was used). Pairs with B14 (transport recording).

Verified: cargo build --release EXIT 0; vue-tsc --noEmit EXIT 0.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

core/archipelago/src/api/rpc/content.rs

@@ -326,11 +326,20 @@ impl RpcHandler {
             ));
         }
 
-        let body: serde_json::Value = response
+        let mut body: serde_json::Value = response
             .json()
             .await
             .context("Failed to parse peer catalog")?;
 
+        // Surface the transport that actually reached the peer so the cloud
+        // browse UI can show a FIPS/Tor pill instead of always assuming Tor (B21).
+        if let Some(obj) = body.as_object_mut() {
+            obj.insert(
+                "transport".to_string(),
+                serde_json::Value::String(transport.to_string()),
+            );
+        }
+
         Ok(body)
     }