diff --git a/App/Services/Calendar.swift b/App/Services/Calendar.swift
index 4eeefbb..730fc9e 100644
--- a/App/Services/Calendar.swift
+++ b/App/Services/Calendar.swift
@@ -126,7 +126,6 @@ final class CalendarService: Service {
             let calendar = Calendar.current
             var startDate = now
             var endDate = calendar.date(byAdding: .weekOfYear, value: 1, to: now)!
-            var hasStart = false
             var hasEnd = false
             var startIsDateOnly = false
             var endIsDateOnly = false
@@ -136,7 +135,6 @@ final class CalendarService: Service {
                     fromISO8601String: start
                 )
             {
-                hasStart = true
                 startDate = parsedStart.date
                 startIsDateOnly = parsedStart.isDateOnly
             }
diff --git a/iMCP.xcodeproj/project.pbxproj b/iMCP.xcodeproj/project.pbxproj
index aaef6a5..7e2ea78 100644
--- a/iMCP.xcodeproj/project.pbxproj
+++ b/iMCP.xcodeproj/project.pbxproj
@@ -305,6 +305,7 @@
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					"DEBUG=1",
 					"$(inherited)",
@@ -321,6 +322,7 @@
 				ONLY_ACTIVE_ARCH = YES;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "DEBUG $(inherited)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_TREAT_WARNINGS_AS_ERRORS = YES;
 			};
 			name = Debug;
 		};
@@ -365,6 +367,7 @@
 				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu17;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
@@ -375,6 +378,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_TREAT_WARNINGS_AS_ERRORS = YES;
 			};
 			name = Release;
 		};