feat(settings): redesign Settings screen with product-grade UX

Restructure sections: CortexOS System, Connection, Identity, About CortexOS

Add visual connection status with green/red dot indicator

Auto-save endpoint URL, replace 'Save & Test' with 'Test Connection'

Add Identity section with System Name and Mode (UserDefaults)

Improve microcopy: 'Connect to enable CortexOS'

Clean Apple-style UI with reusable components

Update app icons

Update SettingsView layout and add connection feedback; add script for generating app icon

Author: pH-7

CortexOSApp/CortexOS.xcodeproj/project.pbxproj

@@ -471,7 +471,7 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				CODE_SIGN_STYLE = Automatic;
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 202604020818;
+				CURRENT_PROJECT_VERSION = 202604021331;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				DEVELOPMENT_TEAM = 2V8LZ2444Y;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
@@ -560,7 +560,7 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				CODE_SIGN_STYLE = Automatic;
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 202604020818;
+				CURRENT_PROJECT_VERSION = 202604021331;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				DEVELOPMENT_TEAM = 2V8LZ2444Y;
 				ENABLE_NS_ASSERTIONS = NO;