Add pull-to-clean on page 2 — mirrors pull-to-backup on page 0

Pull zone now shown on pages 0 and 2. Labels route to
PULL/RELEASE TO CLEAN on page 2. Releasing triggers
triggerCleanViaPull() which fires the clean confirmation dialog
with the same ripple effect as the backup pull.

Co-Authored-By: Kutesir <kutesir@provoc.ug>
Co-Authored-By: Sentry <sentry@provoc.ug>

Features/Backup/BackupView.swift

@@ -693,9 +693,9 @@ struct BackupView: View {
                 Color.clear.frame(height: 60)
             }
         }
-        // Pull zone floats above the ring on page 0 only
+        // Pull zone floats above the ring on pages 0 and 2
         .overlay(alignment: .top) {
-            if ringPage == 0 {
+            if ringPage == 0 || ringPage == 2 {
                 pullZone
                     .offset(y: -max(0, pullProgress * 0.52))
             }
@@ -705,13 +705,15 @@ struct BackupView: View {
     private var pullZone: some View {
         let pct   = min(pullProgress / 58, 1.0)
         let ready = pullProgress >= 58
+        let pullLabel   = ringPage == 2 ? "PULL TO CLEAN"    : "PULL TO BACK UP"
+        let releaseLabel = ringPage == 2 ? "RELEASE TO CLEAN" : "RELEASE TO BACK UP"
         return VStack(spacing: 3) {
             Text("↓")
                 .font(.system(size: 13))
                 .foregroundStyle(ready ? AppTheme.positive : AppTheme.inkTertiary)
                 .rotationEffect(.degrees(ready ? 180 : pct * 160))
                 .opacity(min(pct * 2.5, 1))
-            Text(ready ? "RELEASE TO BACK UP" : "PULL TO BACK UP")
+            Text(ready ? releaseLabel : pullLabel)
                 .font(.system(size: 8, weight: .regular, design: .monospaced))
                 .foregroundStyle(ready ? AppTheme.positive : AppTheme.inkTertiary)
                 .tracking(2)
@@ -820,7 +822,7 @@ struct BackupView: View {
                 withAnimation(.spring(response: 0.38, dampingFraction: 0.85)) { pullProgress = 0 }
                 if fired {
                     UIImpactFeedbackGenerator(style: .medium).impactOccurred()
-                    triggerBackupViaPull()
+                    if ringPage == 2 { triggerCleanViaPull() } else { triggerBackupViaPull() }
                 }
             }
     }
@@ -831,6 +833,12 @@ struct BackupView: View {
         if engine.job.status == .paused { engine.resume() } else { startBackup() }
     }
 
+    private func triggerCleanViaPull() {
+        rippleScale = 0.88; rippleOpacity = 0.6
+        withAnimation(.easeOut(duration: 0.65)) { rippleScale = 1.35; rippleOpacity = 0 }
+        showCleanConfirm = true
+    }
+
     private func arrowFlowOpacity(_ phase: Double) -> Double {
         if phase < 0.4 { return phase / 0.4 * 0.7 }
         if phase < 0.8 { return (0.8 - phase) / 0.4 * 0.7 }