Fix error on Pixelfed/Firefish due to missing followers/following counts

Closes #483

Packages/Pachyderm/Sources/Pachyderm/Model/Account.swift

@@ -40,8 +40,9 @@ public final class Account: AccountProtocol, Decodable, Sendable {
         self.displayName = try container.decode(String.self, forKey: .displayName)
         self.locked = try container.decode(Bool.self, forKey: .locked)
         self.createdAt = try container.decode(Date.self, forKey: .createdAt)
-        self.followersCount = try container.decode(Int.self, forKey: .followersCount)
-        self.followingCount = try container.decode(Int.self, forKey: .followingCount)
+        // some instance types (pixelfed, firefish) seem to sometimes send null for these fields, so just fallback to 0
+        self.followersCount = try container.decodeIfPresent(Int.self, forKey: .followersCount) ?? 0
+        self.followingCount = try container.decodeIfPresent(Int.self, forKey: .followingCount) ?? 0
         self.statusesCount = try container.decode(Int.self, forKey: .statusesCount)
         self.note = try container.decode(String.self, forKey: .note)
         self.url = try container.decode(URL.self, forKey: .url)

Tusker/Screens/Utilities/MultiColumnNavigationController.swift

@@ -142,8 +142,8 @@ class MultiColumnNavigationController: UIViewController {
     }
     
     fileprivate func closeColumn(_ vc: UIViewController) {
-        let index = viewControllers.firstIndex(of: vc)!
-        guard index > 0 else {
+        guard let index = viewControllers.firstIndex(of: vc),
+              index > 0 else {
             // Can't close the last column
             return
         }

Tusker/Views/Profile Header/ProfileHeaderView.xib

@@ -93,7 +93,7 @@
                         <stackView opaque="NO" contentMode="scaleToFill" distribution="fillProportionally" spacing="8" translatesAutoresizingMaskIntoConstraints="NO" id="udp-EN-wtc">
                             <rect key="frame" x="0.0" y="575.5" width="218.5" height="20.5"/>
                             <subviews>
-                                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="5w9-LA-8kc">
+                                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" pointerInteraction="YES" translatesAutoresizingMaskIntoConstraints="NO" id="5w9-LA-8kc">
                                     <rect key="frame" x="0.0" y="0.0" width="104" height="20.5"/>
                                     <state key="normal" title="Button"/>
                                     <buttonConfiguration key="configuration" style="plain" title="123 Following">
@@ -104,7 +104,7 @@
                                         <action selector="followingCountButtonPressed:" destination="iN0-l3-epB" eventType="touchUpInside" id="QOO-zK-pfu"/>
                                     </connections>
                                 </button>
-                                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" id="XCX-Y3-cG5">
+                                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" pointerInteraction="YES" id="XCX-Y3-cG5">
                                     <rect key="frame" x="112" y="0.0" width="106.5" height="20.5"/>
                                     <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                                     <state key="normal" title="Button"/>