fix: stabilize Runtime workflows for 0.12.3

OpenCode status checks could cold-start throwaway servers, unrelated
conversations could block each other, and model, Continue, or remote paths
could replay or duplicate work under failure and backlog conditions. Settings
could also lose edits or overwrite unrelated model fields.

This update makes status checks passive, keeps per-conversation ordering while
allowing concurrency, preserves native long-running work with bounded display
capture and backpressure, narrows retries to known pre-dispatch failures, and
aligns remote Ask permissions without reducing Execute. It also keeps
Embedding updates narrow, improves settings and browser guidance, removes the
unused legacy Main gateway state, and records the validated Desktop 0.12.3 and
Agent 0.11.17 release metadata.

Release note: 改善 OpenCode 切换、多会话长任务、模型重试、远程 Ask/Execute 与设置保存可靠性，并完成 Desktop 0.12.3 / Agent 0.11.17 发布准备。

src/main/index.ts

@@ -152,10 +152,6 @@ import {
 import {
   RemoteEnvironmentOperationStore
 } from './remote-agent/remote-environment-operation-store'
-import type {
-  RuntimeSettings,
-  RuntimeSettingsInput
-} from '../shared/contracts'
 import {
   DesktopDiagnostics,
   type DesktopDiagnosticFailureObserver
@@ -364,84 +360,6 @@ async function createEmbeddingProvider(
   }
 }
 
-function runtimeSettingsInputWithEmbeddingSelection(
-  settings: RuntimeSettings,
-  activeEmbeddingConnectionId: string
-): RuntimeSettingsInput {
-  const configured = settings.configured ?? settings
-  const defaultProfile =
-    settings.modelProfiles.find(
-      (profile) => profile.id === settings.defaultModelProfileId
-    ) ?? settings.modelProfiles[0]
-  if (!defaultProfile || !settings.embeddingConnections) {
-    throw new Error('模型连接设置不完整')
-  }
-  return {
-    provider: settings.provider,
-    modelBaseUrl: defaultProfile.baseUrl,
-    modelName: defaultProfile.modelName,
-    modelProtocol: defaultProfile.protocol,
-    modelAuthentication: defaultProfile.authentication,
-    imageGenerationQuality: defaultProfile.imageGenerationQuality,
-    opencodeBaseUrl: configured.opencodeBaseUrl,
-    opencodeEmbedded: settings.opencodeEmbedded,
-    opencodeBinaryPath: configured.opencodeBinaryPath,
-    opencodeConfigPath: configured.opencodeConfigPath,
-    continueBinaryPath: configured.continueBinaryPath,
-    continueConfigPath: configured.continueConfigPath,
-    continueMode: settings.continueMode,
-    subagentSmartRoutingEnabled: settings.subagentSmartRoutingEnabled,
-    knowledgeEmbeddingEnabled: settings.knowledgeEmbeddingEnabled,
-    knowledgeEmbeddingBaseUrl: settings.knowledgeEmbeddingBaseUrl,
-    knowledgeEmbeddingModel: settings.knowledgeEmbeddingModel,
-    knowledgeEmbeddingApiKey: { action: 'keep' },
-    embeddingConnections: settings.embeddingConnections.map(
-      (connection) =>
-        connection.kind === 'builtin'
-          ? {
-              id: connection.id,
-              name: connection.name,
-              kind: connection.kind
-            }
-          : {
-              id: connection.id,
-              name: connection.name,
-              kind: connection.kind,
-              baseUrl: connection.baseUrl,
-              modelName: connection.modelName,
-              authentication: connection.authentication,
-              apiKey: { action: 'keep' as const }
-            }
-    ),
-    activeEmbeddingConnectionId,
-    knowledgeRerankEnabled: settings.knowledgeRerankEnabled ?? false,
-    knowledgeRerankEndpoint: settings.knowledgeRerankEndpoint ?? '',
-    knowledgeRerankModel: settings.knowledgeRerankModel ?? '',
-    knowledgeRerankApiKey: { action: 'keep' },
-    contextCompression: settings.contextCompression,
-    workspacePath: configured.workspacePath,
-    apiKey: { action: 'keep' },
-    modelProfiles: settings.modelProfiles.map((profile) => ({
-      id: profile.id,
-      name: profile.name,
-      baseUrl: profile.baseUrl,
-      modelName: profile.modelName,
-      protocol: profile.protocol,
-      authentication: profile.authentication,
-      supportsImageInput: profile.supportsImageInput,
-      contextWindowTokens: profile.contextWindowTokens,
-      imageGenerationQuality: profile.imageGenerationQuality,
-      apiKey: { action: 'keep' as const }
-    })),
-    defaultModelProfileId: settings.defaultModelProfileId,
-    opencodeModelSource: configured.opencodeModelSource,
-    continueModelSource: configured.continueModelSource,
-    deepseekHarnessModelSource:
-      configured.deepseekHarnessModelSource ?? { kind: 'platform' },
-    toolApproval: settings.toolApproval
-  }
-}
-
 function createRerankProvider(
   settings: ResolvedRuntimeSettings
 ): CohereRerankClient | undefined {
@@ -1120,6 +1038,22 @@ if (hasSingleInstanceLock) {
         executionSpace
       )
     }
+    const createSelectedStatusRuntime = async (
+      selection: AgentRuntimeSelection
+    ): Promise<AgentRuntime> => {
+      const resolved = applyRuntimeSelection(
+        await settingsStore.getResolvedSettings(),
+        selection
+      )
+      return resolved.target === 'opencode'
+        ? createAgentRuntime(defaultWorkspace, resolved.settings, {
+            bundledRuntimePaths
+          })
+        : createRuntimeWithCapabilities(
+            resolved.settings,
+            resolved.target
+          )
+    }
     const configuredRuntime = await runStartupPrerequisites({
       prepareDeepSeekHome: async () => {
         await mkdir(deepSeekHarnessHome, {
@@ -1192,7 +1126,8 @@ if (hasSingleInstanceLock) {
       createSelectedRuntime,
       undefined,
       undefined,
-      observeDesktopFailure
+      observeDesktopFailure,
+      createSelectedStatusRuntime
     )
     const contextManager = new ContextManager({
       parseDocument: documentParsingService.parse
@@ -1329,27 +1264,16 @@ if (hasSingleInstanceLock) {
     const setCurrentEmbeddingConnection = async (
       connectionId: string
     ): Promise<void> => {
-      const previous = await settingsStore.getPublicSettings()
-      if (previous.activeEmbeddingConnectionId === connectionId) {
+      const selection =
+        await settingsStore.setActiveEmbeddingConnection(connectionId)
+      if (!selection.changed) {
         return
       }
-      await settingsStore.update(
-        runtimeSettingsInputWithEmbeddingSelection(
-          previous,
-          connectionId
-        )
-      )
       try {
         await reconfigureRuntimes()
       } catch (activationError) {
         try {
-          await settingsStore.update(
-            runtimeSettingsInputWithEmbeddingSelection(
-              previous,
-              previous.activeEmbeddingConnectionId ??
-                connectionId
-            )
-          )
+          await selection.restore()
           await reconfigureRuntimes()
         } catch (rollbackError) {
           throw new AggregateError(