diff --git a/application/src/main/kotlin/com/baidaidai/rootless_store/application/environment/InstallEnvironmentUseCase.kt b/application/src/main/kotlin/com/baidaidai/rootless_store/application/environment/InstallEnvironmentUseCase.kt
index 5ab3f1d4..9d7413b7 100644
--- a/application/src/main/kotlin/com/baidaidai/rootless_store/application/environment/InstallEnvironmentUseCase.kt
+++ b/application/src/main/kotlin/com/baidaidai/rootless_store/application/environment/InstallEnvironmentUseCase.kt
@@ -1,6 +1,7 @@
 package com.baidaidai.rootless_store.application.environment
 
 import com.baidaidai.rootless_store.core.util.formatAsMultilineString
+import com.baidaidai.rootless_store.data.fileSystem.gateway.AndroidFileSystemDefaultOperatorGatewayImpl
 import com.baidaidai.rootless_store.data.environment.gateway.EnvironmentGatewayImpl
 import com.baidaidai.rootless_store.data.environment.repository.EnvironmentRepositoryImpl
 import com.baidaidai.rootless_store.data.environment.repository.EnvironmentStatusRepositoryImpl
@@ -14,10 +15,20 @@ import javax.inject.Inject
 import java.io.File
 
 class InstallEnvironmentUseCase @Inject constructor(
+    private val androidFileSystemDefaultOperatorGatewayImpl: AndroidFileSystemDefaultOperatorGatewayImpl,
     private val environmentGatewayImpl: EnvironmentGatewayImpl,
     private val environmentRepositoryImpl: EnvironmentRepositoryImpl,
     private val environmentStatusRepositoryImpl: EnvironmentStatusRepositoryImpl
 ) {
+
+    suspend operator fun invoke(): Result<Unit, PluginError> {
+        val packageDirectory = androidFileSystemDefaultOperatorGatewayImpl
+            .getExternalAppPackageCacheDirectoryFile()
+        val localPackageFile = File(packageDirectory, "package.zip")
+
+        return invoke(localPackageFile)
+    }
+
     suspend operator fun invoke(packageFile: File): Result<Unit, PluginError> {
         val environmentManifest: EnvironmentManifest = environmentGatewayImpl
             .parseEnvironmentManifest(packageFile)
diff --git a/application/src/main/kotlin/com/baidaidai/rootless_store/application/plugin/InstallPluginUseCase.kt b/application/src/main/kotlin/com/baidaidai/rootless_store/application/plugin/InstallPluginUseCase.kt
index 2418c64c..d63c6d79 100644
--- a/application/src/main/kotlin/com/baidaidai/rootless_store/application/plugin/InstallPluginUseCase.kt
+++ b/application/src/main/kotlin/com/baidaidai/rootless_store/application/plugin/InstallPluginUseCase.kt
@@ -1,6 +1,7 @@
 package com.baidaidai.rootless_store.application.plugin
 
 import com.baidaidai.rootless_store.core.util.formatAsMultilineString
+import com.baidaidai.rootless_store.data.fileSystem.gateway.AndroidFileSystemDefaultOperatorGatewayImpl
 import com.baidaidai.rootless_store.data.plugin.gateway.PluginGatewayImpl
 import com.baidaidai.rootless_store.data.plugin.repository.PluginRepositoryImpl
 import com.baidaidai.rootless_store.data.plugin.repository.PluginStatusRepositoryImpl
@@ -15,11 +16,21 @@ import javax.inject.Inject
 import java.io.File
 
 class InstallPluginUseCase @Inject constructor(
+    private val androidFileSystemDefaultOperatorGatewayImpl: AndroidFileSystemDefaultOperatorGatewayImpl,
     private val pluginRepositoryImpl: PluginRepositoryImpl,
     private val pluginStatusRepositoryImpl: PluginStatusRepositoryImpl,
     private val pluginGatewayImpl: PluginGatewayImpl,
     private val installShellPluginUseCase: InstallShellPluginUseCase
 ) {
+
+    suspend operator fun invoke(): Result<Unit, PluginError> {
+        val packageDirectory = androidFileSystemDefaultOperatorGatewayImpl
+            .getExternalAppPackageCacheDirectoryFile()
+        val localPackageFile = File(packageDirectory, "package.zip")
+
+        return invoke(localPackageFile)
+    }
+
     suspend operator fun invoke(packageFile: File): Result<Unit, PluginError> {
 
         val pluginManifest: PluginManifest = pluginGatewayImpl
diff --git a/data/src/main/kotlin/com/baidaidai/rootless_store/data/signature/gateway/PackageSignatureGatewayImpl.kt b/data/src/main/kotlin/com/baidaidai/rootless_store/data/signature/gateway/PackageSignatureGatewayImpl.kt
index 241ef97b..0b2e2a60 100644
--- a/data/src/main/kotlin/com/baidaidai/rootless_store/data/signature/gateway/PackageSignatureGatewayImpl.kt
+++ b/data/src/main/kotlin/com/baidaidai/rootless_store/data/signature/gateway/PackageSignatureGatewayImpl.kt
@@ -5,6 +5,7 @@ import android.util.Log
 import com.baidaidai.rootless_store.data.R
 import com.baidaidai.rootless_store.data.fileSystem.gateway.AndroidFileSystemReadOperatorGatewayImpl
 import com.baidaidai.rootless_store.data.signature.repository.CaCertificateRepositoryImpl
+import com.baidaidai.rootless_store.domain.install.model.LocalPackageType
 import com.baidaidai.rootless_store.domain.install.model.PackageSignatureInfo
 import com.baidaidai.rootless_store.domain.install.model.PackageSignatureStatus
 import dagger.hilt.android.qualifiers.ApplicationContext
@@ -84,11 +85,8 @@ class PackageSignatureGatewayImpl @Inject constructor(
      *
      * @since 2026.10.26
      * @version 0.1.0
-     *
-     *
-     *
      */
-    private suspend fun hasTrustedContentSignature(
+    internal suspend fun hasTrustedContentSignature(
         packageBytes: ByteArray,
         signatureBytes: ByteArray
     ): Boolean {
@@ -170,8 +168,6 @@ class PackageSignatureGatewayImpl @Inject constructor(
                      * 那就直接跳出去吧
                      *
                      * 这一步只浅筛，是否有有效签名者，不进行内容计算
-                     *
-                     * Holder只是指针引用，保存了 Cert 的原始记录
                      */
                     val signerCertificateHolder = cmsCertificateList
                         .firstOrNull { certificateHolder ->
@@ -185,7 +181,6 @@ class PackageSignatureGatewayImpl @Inject constructor(
                             signerCertificateHolder
                         )
 
-                        // 签名者必须是有效期内的非 CA 证书，并允许数字签名用途。
                         signerCertificate.checkValidity()
 
                         // 验证 CMS 内容签名
@@ -239,7 +234,7 @@ class PackageSignatureGatewayImpl @Inject constructor(
      * @since 2026.10.26
      * @version 0.1.0
      */
-    private suspend fun loadTrustedCaCertificates(): Set<X509Certificate> {
+    internal suspend fun loadTrustedCaCertificates(): Set<X509Certificate> {
         Log.d(logTag, "Loading built-in and enabled custom CA certificates")
 
         val trustedCaCertificates = mutableSetOf<X509Certificate>()
@@ -290,8 +285,19 @@ class PackageSignatureGatewayImpl @Inject constructor(
 
     }
 
-    // 将 CMS 携带的中间证书链构建到任一已启用的 CA 信任锚。
-    private fun hasTrustedCertificatePath(
+    /**
+     * 检查签名者证书能否构建到受信任的 CA 锚点。
+     *
+     * 使用 Bouncy Castle 的 PKIX CertPathBuilder，以签名者证书作为目标，
+     * 尝试从提供的信任锚集合中构建证书路径；此处不执行证书吊销检查。
+     *
+     * @param signerCertificate CMS 签名者证书
+     * @param trustedCaCertificates 可作为信任锚的 CA 证书集合
+     * @return 成功构建证书路径时为 true，否则为 false
+     * @since 2026.10.26
+     * @version 0.1.0
+     */
+    internal fun hasTrustedCertificatePath(
         signerCertificate: X509Certificate,
         trustedCaCertificates: Set<X509Certificate>
     ): Boolean {
@@ -338,6 +344,7 @@ class PackageSignatureGatewayImpl @Inject constructor(
 
         if (pluginManifest != null) {
             return PackageSignatureInfo(
+                packageType = LocalPackageType.Plugin,
                 displayName = pluginManifest.pluginRenderingName,
                 author = pluginManifest.author,
                 validSigner = signatureStatus == PackageSignatureStatus.Trusted,
@@ -354,6 +361,7 @@ class PackageSignatureGatewayImpl @Inject constructor(
             ?: error("Signed package did not contain a supported Plugin or Environment manifest")
 
         return PackageSignatureInfo(
+            packageType = LocalPackageType.Environment,
             displayName = environmentManifest.environmentRenderingName,
             author = environmentManifest.author,
             validSigner = signatureStatus == PackageSignatureStatus.Trusted,
diff --git a/domain/src/main/kotlin/com/baidaidai/rootless_store/domain/install/model/PackageSignatureInfo.kt b/domain/src/main/kotlin/com/baidaidai/rootless_store/domain/install/model/PackageSignatureInfo.kt
index 1763f920..76ecc009 100644
--- a/domain/src/main/kotlin/com/baidaidai/rootless_store/domain/install/model/PackageSignatureInfo.kt
+++ b/domain/src/main/kotlin/com/baidaidai/rootless_store/domain/install/model/PackageSignatureInfo.kt
@@ -1,6 +1,7 @@
 package com.baidaidai.rootless_store.domain.install.model
 
 data class PackageSignatureInfo(
+    val packageType: LocalPackageType,
     val displayName: String,
     val author: String,
     val validSigner: Boolean = false,
diff --git a/ui/src/main/kotlin/com/baidaidai/rootless_store/ui/components/pluginScreen/PluginBottomSheetContent.kt b/ui/src/main/kotlin/com/baidaidai/rootless_store/ui/components/pluginScreen/PluginBottomSheetContent.kt
index 48ebe970..d75f1a63 100644
--- a/ui/src/main/kotlin/com/baidaidai/rootless_store/ui/components/pluginScreen/PluginBottomSheetContent.kt
+++ b/ui/src/main/kotlin/com/baidaidai/rootless_store/ui/components/pluginScreen/PluginBottomSheetContent.kt
@@ -30,8 +30,10 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.PreviewLightDark
 import androidx.compose.ui.unit.dp
 import androidx.core.net.toUri
+import com.baidaidai.rootless_store.domain.install.model.LocalPackageType
 import com.baidaidai.rootless_store.domain.install.model.PackageSignatureInfo
 import com.baidaidai.rootless_store.ui.R
+import com.baidaidai.rootless_store.ui.components.common.VerticalSpacer
 import com.baidaidai.rootless_store.ui.theme.ColorFactory
 import com.baidaidai.rootless_store.ui.theme.SuccessColorSet
 import com.baidaidai.rootless_store.ui.theme.WarningColorSet
@@ -197,9 +199,7 @@ fun PluginBottomSheetContent(
                 )
             }
 
-            androidx.compose.foundation.layout.Spacer(
-                modifier = Modifier.height(12.dp)
-            )
+            VerticalSpacer(20.dp)
 
             Text(
                 text = packageDescription,
@@ -209,9 +209,7 @@ fun PluginBottomSheetContent(
                 fontWeight = FontWeight(440)
             )
 
-            androidx.compose.foundation.layout.Spacer(
-                modifier = Modifier.height(20.dp)
-            )
+            VerticalSpacer(20.dp)
 
             Row(
                 horizontalArrangement = Arrangement.spacedBy(12.dp),
@@ -263,6 +261,7 @@ fun PluginBottomSheetContent(
 private fun _preview_() {
     PluginBottomSheetContent(
         packageSignatureInfo = PackageSignatureInfo(
+            packageType = LocalPackageType.Plugin,
             displayName = "Demo Plugin",
             author = "Rootless Store",
             validSigner = false,
diff --git a/ui/src/main/kotlin/com/baidaidai/rootless_store/ui/model/RootlessStorePluginScreenViewModel.kt b/ui/src/main/kotlin/com/baidaidai/rootless_store/ui/model/RootlessStorePluginScreenViewModel.kt
index 3f87fb8c..3eb401f1 100644
--- a/ui/src/main/kotlin/com/baidaidai/rootless_store/ui/model/RootlessStorePluginScreenViewModel.kt
+++ b/ui/src/main/kotlin/com/baidaidai/rootless_store/ui/model/RootlessStorePluginScreenViewModel.kt
@@ -19,11 +19,14 @@ import com.baidaidai.rootless_store.application.environment.ObserveEnvironmentsU
 import com.baidaidai.rootless_store.application.environment.ObserveEnvironmentStatusUseCase
 import com.baidaidai.rootless_store.application.environment.DisableEnvironmentUseCase
 import com.baidaidai.rootless_store.application.environment.EnableEnvironmentUseCase
+import com.baidaidai.rootless_store.application.environment.InstallEnvironmentUseCase
 import com.baidaidai.rootless_store.application.plugin.DisablePluginUseCase
 import com.baidaidai.rootless_store.application.plugin.EnablePluginUseCase
 import com.baidaidai.rootless_store.application.environment.UninstallEnvironmentUseCase
+import com.baidaidai.rootless_store.application.plugin.InstallPluginUseCase
 import com.baidaidai.rootless_store.application.plugin.ResolvePluginShareUriUseCase
 import com.baidaidai.rootless_store.application.plugin.ResolvePluginWebUiUriUseCase
+import com.baidaidai.rootless_store.domain.install.model.LocalPackageType
 import com.baidaidai.rootless_store.domain.plugin.manifest.PluginManifest
 import com.baidaidai.rootless_store.domain.plugin.model.PluginStatus
 import com.baidaidai.rootless_store.ui.uistate.RootlessStorePluginScreenUiState
@@ -49,6 +52,8 @@ class RootlessStorePluginScreenViewModel @Inject constructor(
     private val observeEnvironmentStatusUseCase: ObserveEnvironmentStatusUseCase,
     private val observePluginStatusUseCase: ObservePluginStatusUseCase,
     private val installLocalPackageUseCase: InstallLocalPackageUseCase,
+    private val installPluginUseCase: InstallPluginUseCase,
+    private val installEnvironmentUseCase: InstallEnvironmentUseCase,
     private val enablePluginUseCase: EnablePluginUseCase,
     private val disablePluginUseCase: DisablePluginUseCase,
     private val enableEnvironmentUseCase: EnableEnvironmentUseCase,
@@ -132,9 +137,17 @@ class RootlessStorePluginScreenViewModel @Inject constructor(
     }
 
     fun confirmLocalPackageInstall() {
+        val packageSignatureInfo = _pluginScreenUiState.value.packageSignatureInfo
         clearLocalPackageInstallConfirmation()
-        installLocalPackage()
+
+        viewModelScope.launch {
+            when (packageSignatureInfo!!.packageType) {
+                LocalPackageType.Plugin -> installPluginUseCase()
+                else -> installEnvironmentUseCase()
+            }
+        }
     }
+
     fun dismissLocalPackageInstallConfirmation() {
         clearLocalPackageInstallConfirmation()
         viewModelScope.launch {