docs: remove references to the source app and recording

Prepare for open-sourcing: scrub the prior-art attribution from the spec,
agent guide, and code comments so the project documents its own behavior.

- Reword RULES_FEATURE_SPEC.md to describe OpenAppLock's rules feature
  directly (drop the screen-recording source line and "as observed"/
  "not demoed"/"as shown" framing)
- Replace "the reference app/UI/style/defaults" comments and test names
  with direct descriptions of the behavior
- No behavior change; comments, docs, and @Test display names only

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

OpenAppLockTests/RuleConfigurationTests.swift

@@ -18,7 +18,7 @@ struct RuleConfigurationTests {
         #expect(RuleConfiguration.openLimit(OpenLimitConfig()).kind == .openLimit)
     }
 
-    @Test("Defaults match the reference app's new-rule defaults")
+    @Test("Defaults match the documented new-rule defaults")
     func defaults() {
         let schedule = RuleConfiguration.default(for: .schedule).scheduleConfig
         #expect(schedule?.startMinutes == 9 * 60)

OpenAppLockTests/RuleModelTests.swift

@@ -12,7 +12,7 @@ import Testing
 @MainActor
 @Suite("BlockingRule model & persistence")
 struct RuleModelTests {
-    @Test("Defaults match the reference app's new-rule defaults")
+    @Test("Defaults match the documented new-rule defaults")
     func defaults() {
         let rule = BlockingRule(name: "In the Zone")
         #expect(rule.kind == .schedule)

OpenAppLockTests/RuleStatusTests.swift

@@ -11,7 +11,7 @@ import Testing
 @MainActor
 @Suite("Rule status derivation and labels")
 struct RuleStatusTests {
-    /// 09:00–17:00 weekdays schedule rule, like the video's "Work Time".
+    /// 09:00–17:00 weekdays schedule rule (the "Work Time" preset).
     func workTime(hardMode: Bool = false) -> BlockingRule {
         BlockingRule(name: "Work Time", hardMode: hardMode)
     }
@@ -71,16 +71,16 @@ struct RuleStatusTests {
         }
     }
 
-    @Test("Active label matches the reference style: hours round up")
+    @Test("Active label rounds hours up")
     func activeLabel() {
-        // 11:28 → 17:00 is 5h32m; the reference app shows "6h left".
+        // 11:28 → 17:00 is 5h32m; rounds up to "6h left".
         let status = workTime().status(at: date(2025, 1, 6, 11, 28), calendar: utc)
         #expect(status.label(relativeTo: date(2025, 1, 6, 11, 28)) == "6h left")
     }
 
-    @Test("Upcoming label matches the reference style")
+    @Test("Upcoming label formats hours until start")
     func upcomingLabel() {
-        // Friday 11:28 → Saturday 09:00 is 21h32m; the reference shows "Starts in 22h".
+        // Friday 11:28 → Saturday 09:00 is 21h32m; rounds up to "Starts in 22h".
         let weekend = BlockingRule(name: "Weekend Zen", days: Weekday.weekends)
         let friday = date(2025, 1, 10, 11, 28)
         #expect(weekend.status(at: friday, calendar: utc).label(relativeTo: friday) == "Starts in 22h")