feat(setup): add Save button to Settings, persist all relevant prefs on click

app/build/intermediates/incremental/packageDebug/tmp/debug/dex-renamer-state.txt

@@ -1,4 +1,4 @@
-#Thu Mar 05 23:01:31 CST 2026
+#Fri Mar 06 18:59:47 CST 2026
 path.4=14/classes.dex
 path.3=12/classes.dex
 path.2=10/classes.dex

app/build/kotlin/compileDebugKotlin/cacheable/caches-jvm/inputs/source-to-output.tab.values.s

@@ -1 +1 @@
-<EFBFBD>8<EFBFBD>)
+פ8מ)ת*

app/build/kotlin/compileDebugKotlin/cacheable/caches-jvm/lookups/counters.tab

@@ -1,2 +1,2 @@
-26
+27
 0

app/build/kotlin/compileDebugKotlin/cacheable/caches-jvm/lookups/lookups.tab.values.s

@@ -1 +1 @@
-<EFBFBD>霎
彧
ﾑ~ﾌ>
+ëXè¾
ú¹
Ñ~Ì>Ň

app/src/main/java/com/inspection/camera/ui/settings/SettingsScreen.kt

@@ -21,6 +21,7 @@ import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.TextButton
 import androidx.compose.material3.RadioButton
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
@@ -92,6 +93,25 @@ fun SettingsScreen(
                         Icon(Icons.Default.ArrowBack, contentDescription = "返回")
                     }
                 },
+                actions = {
+                    // 保存按钮，点击后保存配置并返回主界面
+                    TextButton(onClick = {
+                        // 保存所有设置到偏好
+                        scope.launch {
+                            preferencesManager.setWatermarkStyle(watermarkStyle)
+                            preferencesManager.setLocationMode(locationMode)
+                            preferencesManager.setMergeLayout(mergeLayout)
+                            preferencesManager.setImageQuality(imageQuality)
+                            preferencesManager.setTitleStyle(titleStyle)
+                            preferencesManager.setDefaultTheme(defaultTheme)
+                            preferencesManager.setRecorderName(recorderName)
+                        }
+                        // 返回主界面
+                        onNavigateBack()
+                    }) {
+                        Text("保存", color = Color.White)
+                    }
+                },
                 colors = TopAppBarDefaults.topAppBarColors(
                     containerColor = Primary,
                     titleContentColor = Color.White,