feat: replace the preset gallery with original schedules

Swap the six suggested rules for an original set so the preset offerings
are OpenAppLock's own:

- Focus Time: Morning Focus (08:00-11:30 weekdays), Deep Work (13:30-16:00 weekdays)
- Rest & Recharge: Evening Reset (21:00-23:00), Lights Out (23:00-06:30, crosses midnight)
- Healthy Balance: Family Dinner (18:00-19:30), Screen-Free Sunday (09:00-20:00, Sundays)

Update the spec preset gallery (sections 1, 3.3, 4) and the preset
unit/UI tests to the new ids, names, and times. Build green; the preset
draft unit test and the two preset UI tests pass.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

OpenAppLockTests/RuleModelTests.swift

@@ -177,12 +177,12 @@ struct RuleDraftTests {
         let preset = try #require(
             RulePresetSection.all
                 .flatMap(\.presets)
-                .first { $0.id == "deep-sleep" }
+                .first { $0.id == "lights-out" }
         )
         let draft = RuleDraft(preset: preset)
-        #expect(draft.name == "Deep Sleep")
-        #expect(draft.scheduleConfig.startMinutes == 22 * 60)
-        #expect(draft.scheduleConfig.endMinutes == 6 * 60)
+        #expect(draft.name == "Lights Out")
+        #expect(draft.scheduleConfig.startMinutes == 23 * 60)
+        #expect(draft.scheduleConfig.endMinutes == 6 * 60 + 30)
         #expect(draft.kind == .schedule)
     }
 }