refactor: extract BridgeStatusSummary formatter with tests

Move bridge status string assembly into a testable helper used by App Info.

bitchat/Services/Gateway/BridgeStatusSummary.swift

@@ -0,0 +1,63 @@
+//
+// BridgeStatusSummary.swift
+// bitchat
+//
+// This is free and unencumbered software released into the public domain.
+// For more information, see <https://unlicense.org>
+//
+
+import Foundation
+
+/// One-line mesh bridge status for the settings pane.
+enum BridgeStatusSummary {
+    static func formatted(
+        enabled: Bool,
+        cell: String?,
+        bridgedCount: Int,
+        nearbyOnly: Bool
+    ) -> String {
+        if !enabled {
+            return String(
+                localized: "app_info.settings.bridge.status.off",
+                defaultValue: "bridge off — only radio-range mesh traffic",
+                comment: "Bridge status line when the mesh bridge toggle is off"
+            )
+        }
+        let cellPart = cell.map {
+            String(
+                format: String(
+                    localized: "app_info.settings.bridge.status.cell",
+                    defaultValue: "rendezvous #%@",
+                    comment: "Bridge status fragment showing rendezvous cell; %@ is geohash"
+                ),
+                locale: .current,
+                $0
+            )
+        } ?? String(
+            localized: "app_info.settings.bridge.status.no_cell",
+            defaultValue: "no rendezvous cell",
+            comment: "Bridge status fragment when no cell is active"
+        )
+        let peoplePart = String(
+            format: String(
+                localized: "app_info.settings.bridge.status.people",
+                defaultValue: "%lld people via bridge",
+                comment: "Bridge status fragment counting bridged participants; %lld is count"
+            ),
+            locale: .current,
+            bridgedCount
+        )
+        let composePart = nearbyOnly
+            ? String(
+                localized: "app_info.settings.bridge.status.compose_nearby",
+                defaultValue: "compose: nearby only",
+                comment: "Bridge status fragment when outgoing mesh messages stay on radio"
+            )
+            : String(
+                localized: "app_info.settings.bridge.status.compose_bridged",
+                defaultValue: "compose: bridged",
+                comment: "Bridge status fragment when outgoing mesh messages cross the bridge"
+            )
+        return [cellPart, peoplePart, composePart].joined(separator: " · ")
+    }
+}

bitchat/Views/AppInfoView.swift

@@ -79,25 +79,12 @@ struct AppInfoView: View {
             }
             static let bridgeNoCell = String(localized: "app_info.settings.bridge.no_cell", defaultValue: "no rendezvous cell yet — needs location access or a nearby bridge peer", comment: "Caption under the mesh bridge toggle when the bridge is on but has no geohash cell to meet on")
             static func bridgeStatusSummary(enabled: Bool, cell: String?, bridgedCount: Int, nearbyOnly: Bool) -> String {
-                if !enabled {
-                    return String(localized: "app_info.settings.bridge.status.off", defaultValue: "bridge off — only radio-range mesh traffic", comment: "Bridge status line when the mesh bridge toggle is off")
-                }
-                let cellPart = cell.map {
-                    String(
-                        format: String(localized: "app_info.settings.bridge.status.cell", defaultValue: "rendezvous #%@", comment: "Bridge status fragment showing rendezvous cell; %@ is geohash"),
-                        locale: .current,
-                        $0
-                    )
-                } ?? String(localized: "app_info.settings.bridge.status.no_cell", defaultValue: "no rendezvous cell", comment: "Bridge status fragment when no cell is active")
-                let peoplePart = String(
-                    format: String(localized: "app_info.settings.bridge.status.people", defaultValue: "%lld people via bridge", comment: "Bridge status fragment counting bridged participants; %lld is count"),
-                    locale: .current,
-                    bridgedCount
+                BridgeStatusSummary.formatted(
+                    enabled: enabled,
+                    cell: cell,
+                    bridgedCount: bridgedCount,
+                    nearbyOnly: nearbyOnly
                 )
-                let composePart = nearbyOnly
-                    ? String(localized: "app_info.settings.bridge.status.compose_nearby", defaultValue: "compose: nearby only", comment: "Bridge status fragment when outgoing mesh messages stay on radio")
-                    : String(localized: "app_info.settings.bridge.status.compose_bridged", defaultValue: "compose: bridged", comment: "Bridge status fragment when outgoing mesh messages cross the bridge")
-                return [cellPart, peoplePart, composePart].joined(separator: " · ")
             }
 
             // Moved from LocationChannelsSheet; keys unchanged. (The former

bitchatTests/Services/BridgeStatusSummaryTests.swift

@@ -0,0 +1,23 @@
+//
+// BridgeStatusSummaryTests.swift
+// bitchatTests
+//
+// This is free and unencumbered software released into the public domain.
+// For more information, see <https://unlicense.org>
+//
+
+import Testing
+@testable import bitchat
+
+struct BridgeStatusSummaryTests {
+    @Test func offStateDoesNotMentionBridgePeople() {
+        let text = BridgeStatusSummary.formatted(enabled: false, cell: "u4pruy", bridgedCount: 3, nearbyOnly: false)
+        #expect(text.lowercased().contains("bridge off"))
+    }
+
+    @Test func enabledStateIncludesCellAndCount() {
+        let text = BridgeStatusSummary.formatted(enabled: true, cell: "u4pruy", bridgedCount: 2, nearbyOnly: true)
+        #expect(text.contains("u4pruy"))
+        #expect(text.contains("nearby"))
+    }
+}