fix: resolve all compilation errors (weight import, asStateFlow, getCookies->get, CoroutineScope import, JsonPrimitive form values, ExperimentalMaterial3Api)

shared/src/commonMain/kotlin/com/bricks/mp/core/BricksRenderer.kt

@@ -1,7 +1,19 @@
 package com.bricks.mp.core
 
 import androidx.compose.foundation.*
-import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.BoxWithConstraints
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.layout.weight
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.foundation.horizontalScroll
@@ -38,7 +50,9 @@ fun RenderWidget(
         // 布局
         "HBox", "FHBox" -> RenderHBox(resolvedWidget, actionDispatcher)
         "VBox", "FVBox" -> RenderVBox(resolvedWidget, actionDispatcher)
-        "Filler", "HFiller" -> Spacer(modifier = Modifier.weight(1f))
+        "Filler", "HFiller" -> {
+            Spacer(modifier = Modifier.weight(1f))
+        }
         "VFiller" -> Spacer(modifier = Modifier.height(
             WidgetOptions.getString(resolvedWidget.options, "height", "16").toFloatOrNull()?.dp ?: 16.dp
         ))
@@ -316,7 +330,7 @@ private fun RenderFormWidget(widget: BricksWidget, actionDispatcher: ActionDispa
                         val updatedBind = bind.copy(
                             options = bind.options + mapOf(
                                 "formdata" to kotlinx.serialization.json.buildJsonObject {
-                                    formValues.forEach { (k, v) -> put(k, v) }
+                                    formValues.forEach { (k, v) -> put(k, kotlinx.serialization.json.JsonPrimitive(v)) }
                                 }
                             )
                         )

shared/src/commonMain/kotlin/com/bricks/mp/sage/SageClient.kt

@@ -8,6 +8,7 @@ import io.ktor.client.plugins.cookies.*
 import io.ktor.client.request.*
 import io.ktor.client.statement.*
 import io.ktor.http.*
+import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import kotlinx.serialization.json.*
@@ -40,10 +41,10 @@ class SageClient {
 
     // 登录状态
     private val _isLoggedIn = kotlinx.coroutines.flow.MutableStateFlow(false)
-    val isLoggedIn = _isLoggedIn.asStateFlow()
+    val isLoggedIn: kotlinx.coroutines.flow.StateFlow<Boolean> = _isLoggedIn
 
     private val _loginError = kotlinx.coroutines.flow.MutableStateFlow<String?>(null)
-    val loginError = _loginError.asStateFlow()
+    val loginError: kotlinx.coroutines.flow.StateFlow<String?> = _loginError
 
     private val mutex = Mutex()
 
@@ -82,7 +83,7 @@ class SageClient {
 
             if (widgetType == "Message" || widgetType == "UiMessage") {
                 // 检查是否有 session cookie
-                val cookies = cookieStorage.getCookies(URLBuilder(baseUrl).build())
+                val cookies = cookieStorage.get(URLBuilder(baseUrl).build())
                 if (cookies.isNotEmpty()) {
                     println("[Sage] Login successful, got ${cookies.size} cookies")
                     _isLoggedIn.value = true
@@ -197,7 +198,7 @@ class SageClient {
     suspend fun logout() = mutex.withLock {
         try {
             // 清除 cookies
-            cookieStorage.getCookies(URLBuilder(baseUrl).build())
+            cookieStorage.get(URLBuilder(baseUrl).build())
             _isLoggedIn.value = false
             println("[Sage] Logged out")
         } catch (e: Exception) {

shared/src/jvmMain/kotlin/com/bricks/Main.kt

@@ -25,8 +25,8 @@ import com.bricks.mp.core.BricksWidget
 import com.bricks.mp.core.RenderWidget
 import com.bricks.mp.actions.ActionDispatcher
 import com.bricks.mp.sage.SageClient
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.IO
 import kotlinx.coroutines.launch
 
 /**
@@ -274,6 +274,7 @@ fun LoginScreen(
 /**
  * 主应用界面
  */
+@OptIn(androidx.compose.material3.ExperimentalMaterial3Api::class)
 @Composable
 fun MainAppScreen(
     rootWidget: BricksWidget,