feat: Windows compatibility (#836)

* feat: win compatibility

* fix

* fix: uptime parse

* opt.: linux uptime accuracy

* fix: windows temperature fetching

* opt.

* opt.: powershell exec

* refactor: address PR review feedback and improve code quality

### Major Improvements:
- **Refactored Windows status parsing**: Broke down large `_getWindowsStatus` method into 13 smaller, focused helper methods for better maintainability and readability
- **Extracted system detection logic**: Created dedicated `SystemDetector` helper class to separate OS detection concerns from ServerProvider
- **Improved concurrency handling**: Implemented proper synchronization for server updates using Future-based locks to prevent race conditions

### Bug Fixes:
- **Fixed CPU percentage parsing**: Removed incorrect '*100' multiplication in BSD CPU parsing (values were already percentages)
- **Enhanced memory parsing**: Added validation and error handling to BSD memory fallback parsing with proper logging
- **Improved uptime parsing**: Added support for multiple Windows date formats and robust error handling with validation
- **Fixed division by zero**: Added safety checks in Swap.usedPercent getter

### Code Quality Enhancements:
- **Added comprehensive documentation**: Documented Windows CPU counter limitations and approach
- **Strengthened error handling**: Added detailed logging and validation throughout parsing methods
- **Improved robustness**: Enhanced BSD CPU parsing with percentage validation and warnings
- **Better separation of concerns**: Each parsing method now has single responsibility

### Files Changed:
- `lib/data/helper/system_detector.dart` (new): System detection helper
- `lib/data/model/server/cpu.dart`: Fixed percentage parsing and added validation
- `lib/data/model/server/memory.dart`: Enhanced fallback parsing and division-by-zero protection
- `lib/data/model/server/server_status_update_req.dart`: Refactored into 13 focused parsing methods
- `lib/data/provider/server.dart`: Improved synchronization and extracted system detection

🤖 Generated with [Claude Code](https://claude.ai/code)

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

* refactor: parse & shell fn struct

---------

Co-authored-by: Claude <noreply@anthropic.com>

lib/view/widget/unix_perm.dart

@@ -6,11 +6,7 @@ final class UnixPermOp {
   final bool w;
   final bool x;
 
-  const UnixPermOp({
-    required this.r,
-    required this.w,
-    required this.x,
-  });
+  const UnixPermOp({required this.r, required this.w, required this.x});
 
   UnixPermOp copyWith({bool? r, bool? w, bool? x}) {
     return UnixPermOp(r: r ?? this.r, w: w ?? this.w, x: x ?? this.x);
@@ -24,8 +20,7 @@ final class UnixPermOp {
 enum UnixPermScope {
   user,
   group,
-  other,
-  ;
+  other;
 
   String get title {
     return switch (this) {
@@ -72,10 +67,10 @@ final class UnixPerm {
   }
 
   static UnixPerm get empty => const UnixPerm(
-        user: UnixPermOp(r: false, w: false, x: false),
-        group: UnixPermOp(r: false, w: false, x: false),
-        other: UnixPermOp(r: false, w: false, x: false),
-      );
+    user: UnixPermOp(r: false, w: false, x: false),
+    group: UnixPermOp(r: false, w: false, x: false),
+    other: UnixPermOp(r: false, w: false, x: false),
+  );
 }
 
 final class UnixPermEditor extends StatefulWidget {
@@ -150,9 +145,6 @@ final class _UnixPermEditorState extends State<UnixPermEditor> {
   }
 
   Widget _buildSwitch(bool value, void Function(bool) onChanged) {
-    return Switch(
-      value: value,
-      onChanged: onChanged,
-    );
+    return Switch(value: value, onChanged: onChanged);
   }
 }