完善个人信息编辑

- 修复了从相册选择图片时，如果文件名不包含扩展名导致的崩溃问题。
- 在编辑个人信息页面增加了“修改密码”的入口。
- 修复了新建Agent时，保存按钮状态更新不及时的问题。
- 优化了新建Agent时，对异常的处理。

app/src/main/java/com/aiosman/ravenow/ui/account/edit.kt

@@ -82,7 +82,8 @@ fun AccountEditScreen() {
                 var newAvatar: UploadImage? = null
                 cursor?.use { cur ->
                     if (cur.moveToFirst()) {
-                        val displayName = cur.getString(cur.getColumnIndex("_display_name"))
+                        val columnIndex = cur.getColumnIndex("_display_name")
+                        val displayName = if (columnIndex >= 0) cur.getString(columnIndex) else "unknown"
                         val extension = displayName.substringAfterLast(".")
                         Log.d("NewPost", "File name: $displayName, extension: $extension")
                         // read as file
@@ -98,7 +99,8 @@ fun AccountEditScreen() {
                 var newBanner: UploadImage? = null
                 cursor?.use { cur ->
                     if (cur.moveToFirst()) {
-                        val displayName = cur.getString(cur.getColumnIndex("_display_name"))
+                        val columnIndex = cur.getColumnIndex("_display_name")
+                        val displayName = if (columnIndex >= 0) cur.getString(columnIndex) else "unknown"
                         val extension = displayName.substringAfterLast(".")
                         Log.d("NewPost", "File name: $displayName, extension: $extension")
                         // read as file

app/src/main/java/com/aiosman/ravenow/ui/agent/AddAgent.kt

@@ -215,7 +215,7 @@ fun AddAgentScreen() {
             text = stringResource(R.string.agent_create),
             isLoading = model.isUpdating,
             loadingText = stringResource(R.string.agent_createing),
-            enabled = !model.isUpdating && model.validate() == null
+            enabled = !model.isUpdating && validate()
         ) {
             // 验证输入
             val validationError = model.validate()

app/src/main/java/com/aiosman/ravenow/ui/agent/AddAgentViewModel.kt

@@ -55,7 +55,7 @@ object AddAgentViewModel : ViewModel() {
             )
             
             return result
-        } catch (e: Exception)
+        } catch (e: Exception) {
             throw e
         } finally {
             isUpdating = false