ci(workflow): 优化Windows构建流程中的Flutter路径配置

简化Flutter路径的配置逻辑，直接使用固定路径C:\flutter\bin
在关键步骤前确保Flutter路径已正确设置

.gitea/workflows/docker.yml

@@ -188,51 +188,57 @@ jobs:
           exit 1
         }
 
+    - name: Add Flutter to PATH
+      shell: powershell
+      run: |
+        # Add Flutter to PATH for current session and GitHub Actions
+        $flutterPath = "C:\flutter\bin"
+        if (Test-Path $flutterPath) {
+          Write-Host "Adding Flutter to PATH: $flutterPath"
+          $env:PATH = "$flutterPath;$env:PATH"
+          Add-Content -Path $env:GITHUB_PATH -Value $flutterPath
+          
+          # Verify Flutter is accessible
+          $flutterVersion = flutter --version 2>&1
+          if ($LASTEXITCODE -eq 0) {
+            Write-Host "Flutter verified: $flutterVersion"
+          } else {
+            Write-Host "Flutter not found at $flutterPath"
+            exit 1
+          }
+        } else {
+          Write-Host "ERROR: Flutter not found at C:\flutter\bin"
+          exit 1
+        }
+
     - name: Enable Windows desktop
       shell: powershell
       run: |
-        $flutterPath = Get-Command flutter -ErrorAction SilentlyContinue
-        if (-not $flutterPath) {
-          Write-Host "Flutter not found, checking common locations..."
-          $commonPaths = @(
-            "C:\flutter\bin\flutter.exe",
-            "C:\tools\flutter\bin\flutter.exe",
-            "${env:USERPROFILE}\flutter\bin\flutter.exe"
-          )
-          $flutterFound = $false
-          foreach ($path in $commonPaths) {
-            if (Test-Path $path) {
-              Write-Host "Found Flutter at: $path"
-              $env:PATH = "$(Split-Path $path);$env:PATH"
-              $flutterFound = $true
-              break
-            }
-          }
-          if (-not $flutterFound) {
-            Write-Host "ERROR: Flutter not found. Please install Flutter first."
-            exit 1
-          }
-        }
+        $env:PATH = "C:\flutter\bin;$env:PATH"
         flutter config --enable-windows-desktop
 
     - name: Get dependencies
-      shell: powershell  
+      shell: powershell
       run: |
+        $env:PATH = "C:\flutter\bin;$env:PATH"
         flutter pub get
 
     - name: Generate code
       shell: powershell
       run: |
+        $env:PATH = "C:\flutter\bin;$env:PATH"
         dart run build_runner build --delete-conflicting-outputs
 
     - name: Build Windows Debug
       shell: powershell
       run: |
+        $env:PATH = "C:\flutter\bin;$env:PATH"
         flutter build windows
 
     - name: Build Windows Release
       shell: powershell
       run: |
+        $env:PATH = "C:\flutter\bin;$env:PATH"
         flutter build windows --release
 
     - name: Upload Debug build artifacts