feat: re-skin to native three-tab UI and add Uninstall Protection

Replace the custom themed presentation with the bare native iOS design
language across a three-tab TabView (Home / Rules / Settings):

- MainTabView hosts the enforcement lifecycle (refresh loop, rule-change
  and scene-active reconcile) so it runs regardless of the selected tab
- HomeView: "Currently Blocking" + "Usage" sections (replaces AppsHomeView)
- RulesListView: rules grouped into Schedule / Time Limit / Open Limit
- SettingsView: Uninstall Protection toggle + Manage App Lists
- AppListLibraryView / ManageAppListsView: shared App List management
- AppSettings: app-group-backed settings store

Uninstall Protection: while enabled and any Hard Mode rule is actively
blocking, deny device app-removal via a dedicated ManagedSettingsStore
(RulePolicy.shouldDenyAppRemoval -> RuleEnforcer -> ShieldController).

Slim AppListPickerSheet to the picker role; drop AppsHomeView and the
custom Theme/HoldToCommitButton/RuleCardView chrome. Update spec section 6
and the unit/UI test suites accordingly.

OpenAppLockTests/RuleEnforcerTests.swift

@@ -269,3 +269,71 @@ struct OverlappingRuleEnforcementTests {
         #expect(shields.shieldedRuleIDs == [rule.id])
     }
 }
+
+/// Uninstall Protection: `refresh` denies device app removal only while the
+/// user opted in *and* a Hard Mode rule is actively blocking.
+@MainActor
+@Suite("Uninstall protection enforcement")
+struct UninstallProtectionEnforcementTests {
+    let mondayDuringWork = date(2025, 1, 6, 10, 0)  // inside the default 09:00–17:00
+    let mondayEvening = date(2025, 1, 6, 19, 0)     // outside it
+
+    private func hardRule() -> BlockingRule {
+        BlockingRule(name: "Locked In", hardMode: true)
+    }
+
+    @Test("Disabled setting never denies app removal")
+    func disabledSettingNeverDenies() {
+        let shields = MockShieldController()
+        let enforcer = RuleEnforcer(
+            shields: shields, settings: MockAppSettings(uninstallProtectionEnabled: false))
+
+        enforcer.refresh(rules: [hardRule()], at: mondayDuringWork, calendar: utc)
+
+        #expect(!shields.appRemovalDenied)
+    }
+
+    @Test("Enabled setting denies removal while a hard rule is blocking")
+    func deniesDuringHardBlock() {
+        let shields = MockShieldController()
+        let enforcer = RuleEnforcer(
+            shields: shields, settings: MockAppSettings(uninstallProtectionEnabled: true))
+
+        enforcer.refresh(rules: [hardRule()], at: mondayDuringWork, calendar: utc)
+
+        #expect(shields.appRemovalDenied)
+    }
+
+    @Test("A soft rule does not deny removal even with the setting on")
+    func softRuleDoesNotDeny() {
+        let shields = MockShieldController()
+        let enforcer = RuleEnforcer(
+            shields: shields, settings: MockAppSettings(uninstallProtectionEnabled: true))
+
+        enforcer.refresh(rules: [BlockingRule(name: "Work Time")], at: mondayDuringWork, calendar: utc)
+
+        #expect(!shields.appRemovalDenied)
+    }
+
+    @Test("Denial lifts once the hard window ends")
+    func liftsWhenWindowEnds() {
+        let shields = MockShieldController()
+        let enforcer = RuleEnforcer(
+            shields: shields, settings: MockAppSettings(uninstallProtectionEnabled: true))
+        let rule = hardRule()
+
+        enforcer.refresh(rules: [rule], at: mondayDuringWork, calendar: utc)
+        #expect(shields.appRemovalDenied)
+
+        enforcer.refresh(rules: [rule], at: mondayEvening, calendar: utc)
+        #expect(!shields.appRemovalDenied)
+    }
+
+    @Test("clearShields(except:) does not disturb the app-removal denial")
+    func clearShieldsPreservesDenial() {
+        let shields = MockShieldController()
+        shields.setAppRemovalDenied(true)
+        shields.clearShields(except: [])
+        #expect(shields.appRemovalDenied)
+    }
+}

OpenAppLockTests/RulePolicyTests.swift

@@ -79,3 +79,60 @@ struct RulePolicyTests {
         #expect(rule.pausedUntil == nil)
     }
 }
+
+@MainActor
+@Suite("Uninstall protection policy")
+struct UninstallProtectionPolicyTests {
+    let mondayDuringWork = date(2025, 1, 6, 10, 0)
+    let mondayEvening = date(2025, 1, 6, 19, 0)
+
+    func scheduleRule(hardMode: Bool) -> BlockingRule {
+        BlockingRule(name: "Work Time", hardMode: hardMode)
+    }
+
+    func hardLimitRule() -> BlockingRule {
+        BlockingRule(
+            name: "Time Keeper",
+            configuration: .timeLimit(TimeLimitConfig(dailyLimitMinutes: 45)),
+            hardMode: true,
+            days: Weekday.everyDay)
+    }
+
+    @Test("App removal is only denied with the setting on AND a hard rule active")
+    func deniedOnlyWhenEnabledAndHardLocked() {
+        let hard = scheduleRule(hardMode: true)
+        // Setting off: never deny, even with an active hard rule.
+        #expect(
+            !RulePolicy.shouldDenyAppRemoval(
+                rules: [hard], enabled: false, at: mondayDuringWork, calendar: utc))
+        // Setting on + active hard rule: deny.
+        #expect(
+            RulePolicy.shouldDenyAppRemoval(
+                rules: [hard], enabled: true, at: mondayDuringWork, calendar: utc))
+        // Setting on but the hard rule is outside its window: do not deny.
+        #expect(
+            !RulePolicy.shouldDenyAppRemoval(
+                rules: [hard], enabled: true, at: mondayEvening, calendar: utc))
+    }
+
+    @Test("A soft rule never triggers app-removal denial")
+    func softRuleNeverDenies() {
+        let soft = scheduleRule(hardMode: false)
+        #expect(
+            !RulePolicy.shouldDenyAppRemoval(
+                rules: [soft], enabled: true, at: mondayDuringWork, calendar: utc))
+    }
+
+    @Test("A spent hard-mode limit rule triggers denial; unspent does not")
+    func spentHardLimitDenies() {
+        let rule = hardLimitRule()
+        #expect(
+            RulePolicy.shouldDenyAppRemoval(
+                rules: [rule], enabled: true, usageFor: { _ in RuleUsage(minutesUsed: 45) },
+                at: mondayDuringWork, calendar: utc))
+        #expect(
+            !RulePolicy.shouldDenyAppRemoval(
+                rules: [rule], enabled: true, usageFor: { _ in RuleUsage(minutesUsed: 10) },
+                at: mondayDuringWork, calendar: utc))
+    }
+}

OpenAppLockTests/UsageTests.swift

@@ -254,4 +254,14 @@ struct UsageDisplayTests {
         let over = RuleUsage(minutesUsed: 60)
         #expect(UsageDisplay.subtitle(for: timeRule, usage: over) == "45m of 45m used today")
     }
+
+    @Test("Typed subtitles prefix the rule kind so type is clear without the icon")
+    func typedSubtitles() {
+        #expect(
+            UsageDisplay.typedSubtitle(for: timeRule, usage: RuleUsage(minutesUsed: 18))
+                == "Time Limit · 18m of 45m used today")
+        #expect(
+            UsageDisplay.typedSubtitle(for: openRule, usage: RuleUsage(opensUsed: 2))
+                == "Open Limit · 2 of 5 opens today")
+    }
 }