Add 4 new unit test suites for greenfield test plan coverage

Add 87 new tests (384 total) covering ValidationRules/ValidationError,
PasswordResetViewModel navigation and client-side validation, WidgetAction
Codable/Equatable/accessors, parseDate, and ThemeID enum properties.
Updates greenfield CSV for AUTH-012/017/018, NOTIF-006/007, WID-003, THEME-002.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

iosApp/CaseraTests/ThemeIDTests.swift

@@ -0,0 +1,50 @@
+//
+//  ThemeIDTests.swift
+//  CaseraTests
+//
+//  Unit tests for ThemeID enum properties and round-tripping.
+//
+
+import Testing
+@testable import Casera
+
+// MARK: - ThemeID Enum Tests
+
+struct ThemeIDTests {
+
+    @Test func allCasesCountIsEleven() {
+        #expect(ThemeID.allCases.count == 11)
+    }
+
+    @Test func allDisplayNamesAreNonEmpty() {
+        for theme in ThemeID.allCases {
+            #expect(!theme.displayName.isEmpty, "ThemeID.\(theme) has empty displayName")
+        }
+    }
+
+    @Test func allDescriptionsAreNonEmpty() {
+        for theme in ThemeID.allCases {
+            #expect(!theme.description.isEmpty, "ThemeID.\(theme) has empty description")
+        }
+    }
+
+    @Test func rawValueRoundTripsForAllCases() {
+        for theme in ThemeID.allCases {
+            let roundTripped = ThemeID(rawValue: theme.rawValue)
+            #expect(roundTripped == theme, "ThemeID.\(theme) failed rawValue round-trip")
+        }
+    }
+
+    @Test func allRawValuesAreUnique() {
+        let rawValues = ThemeID.allCases.map(\.rawValue)
+        #expect(Set(rawValues).count == rawValues.count)
+    }
+
+    @Test func brightDisplayNameIsDefault() {
+        #expect(ThemeID.bright.displayName == "Default")
+    }
+
+    @Test func oceanRawValueIsOcean() {
+        #expect(ThemeID.ocean.rawValue == "Ocean")
+    }
+}