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.

OpenAppLockUITests/UsageUITests.swift

@@ -5,35 +5,45 @@
 
 import XCTest
 
-/// The Usage section under Blocked Apps — seeded with limit rules at various
+/// The Usage section on the Home tab — seeded with limit rules at various
 /// budget states ("Time Keeper" 18m/45m, "Gate Keeper" 2/5 opens,
-/// "Doom Scroll" spent → blocked).
+/// "Doom Scroll" spent → moved to Currently Blocking).
 final class UsageUITests: XCTestCase {
     override func setUpWithError() throws {
         continueAfterFailure = false
     }
 
-    func testUsageSectionShowsTimeAndOpenBudgets() throws {
+    func testUsageSectionShowsTypeAndBudgets() throws {
         let app = XCUIApplication.launchOpenAppLock(seedScenario: "limits")
 
         XCTAssertTrue(app.staticTexts["Usage"].waitToAppear().exists)
 
+        // The row leads with the rule type, then the live usage and remaining.
         let timeRow = app.element("usageRow-Time Keeper").waitToAppear()
+        XCTAssertTrue(timeRow.label.contains("Time Limit"), "Got: \(timeRow.label)")
         XCTAssertTrue(timeRow.label.contains("18m of 45m used today"), "Got: \(timeRow.label)")
         XCTAssertTrue(timeRow.label.contains("27m left"), "Got: \(timeRow.label)")
 
         let openRow = app.element("usageRow-Gate Keeper").waitToAppear()
+        XCTAssertTrue(openRow.label.contains("Open Limit"), "Got: \(openRow.label)")
         XCTAssertTrue(openRow.label.contains("2 of 5 opens today"), "Got: \(openRow.label)")
         XCTAssertTrue(openRow.label.contains("3 opens left"), "Got: \(openRow.label)")
     }
 
-    func testSpentBudgetShowsAsBlockedUntilTomorrow() throws {
+    func testSpentBudgetMovesToCurrentlyBlocking() throws {
         let app = XCUIApplication.launchOpenAppLock(seedScenario: "limits")
 
-        let spentRow = app.element("usageRow-Doom Scroll").waitToAppear()
-        XCTAssertTrue(spentRow.label.contains("Blocked until tomorrow"), "Got: \(spentRow.label)")
-        // A spent budget is a real block: the rule surfaces in Blocked Apps.
-        XCTAssertTrue(app.buttons["blockedTile-Doom Scroll"].waitToAppear().exists)
+        // A spent budget is a real block: the rule moves out of Usage and into
+        // Currently Blocking, carrying its type + usage tracking.
+        let tile = app.buttons["blockedTile-Doom Scroll"].waitToAppear()
+        XCTAssertTrue(tile.label.contains("Time Limit"), "Got: \(tile.label)")
+        XCTAssertTrue(tile.label.contains("30m of 30m used today"), "Got: \(tile.label)")
+
+        // It is no longer tracked under Usage.
+        XCTAssertFalse(
+            app.element("usageRow-Doom Scroll").exists,
+            "A spent rule should leave the Usage section for Currently Blocking"
+        )
     }
 
     func testSpentBudgetCanBeUnblockedUntilTomorrow() throws {
@@ -42,6 +52,7 @@ final class UsageUITests: XCTestCase {
         app.buttons["blockedTile-Doom Scroll"].waitToAppear().tap()
         app.sheets.buttons["Unblock"].waitToAppear().tap()
 
+        // Unblocked → paused (not blocking), so it drops back into Usage.
         app.staticTexts["nothingBlockedLabel"].waitToAppear()
         let row = app.element("usageRow-Doom Scroll").waitToAppear()
         XCTAssertTrue(row.label.contains("Unblocked until tomorrow"), "Got: \(row.label)")