feat: migrate to OpenCode SDK v2

Update all import statements to use @opencode-ai/sdk/v2
Modify Vite configurations to alias new SDK path
Update API client method signatures for SDK v2 compatibility

packages/ui/src/hooks/useAssistantStatus.ts

@@ -1,5 +1,5 @@
 import React from 'react';
-import type { AssistantMessage, Message, Part, ReasoningPart, TextPart, ToolPart } from '@opencode-ai/sdk';
+import type { AssistantMessage, Message, Part, ReasoningPart, TextPart, ToolPart } from '@opencode-ai/sdk/v2';
 import { useShallow } from 'zustand/react/shallow';
 
 import type { MessageStreamPhase } from '@/stores/types/sessionTypes';

packages/ui/src/hooks/useChatScrollManager.ts

@@ -1,5 +1,5 @@
 import React from 'react';
-import type { Part } from '@opencode-ai/sdk';
+import type { Part } from '@opencode-ai/sdk/v2';
 
 import { MessageFreshnessDetector } from '@/lib/messageFreshness';
 

packages/ui/src/hooks/useEventStream.ts

@@ -5,7 +5,7 @@ import { useSessionStore } from '@/stores/useSessionStore';
 import { useConfigStore } from '@/stores/useConfigStore';
 import { useUIStore, type EventStreamStatus } from '@/stores/useUIStore';
 import { useDirectoryStore } from '@/stores/useDirectoryStore';
-import type { Part, Session, Message, Permission } from '@opencode-ai/sdk';
+import type { Part, Session, Message, Permission } from '@opencode-ai/sdk/v2';
 import { streamDebugEnabled } from '@/stores/utils/streamDebug';
 import { handleTodoUpdatedEvent } from '@/stores/useTodoStore';
 

packages/ui/src/hooks/useMessageSync.ts

@@ -1,5 +1,5 @@
 import React from 'react';
-import type { AssistantMessage, Message, Part } from '@opencode-ai/sdk';
+import type { AssistantMessage, Message, Part } from '@opencode-ai/sdk/v2';
 import { useSessionStore, MEMORY_LIMITS } from '@/stores/useSessionStore';
 import { opencodeClient } from '@/lib/opencode/client';
 import { readSessionCursor } from '@/lib/messageCursorPersistence';

packages/ui/src/hooks/useModelLists.ts

@@ -1,7 +1,7 @@
 import React from 'react';
 import { useConfigStore } from '@/stores/useConfigStore';
 import { useUIStore } from '@/stores/useUIStore';
-import type { Provider } from '@opencode-ai/sdk';
+import type { Provider } from '@opencode-ai/sdk/v2';
 
 type ProviderModel = Provider["models"][string];
 type ProviderWithModelList = Omit<Provider, "models"> & { models: ProviderModel[] };

packages/ui/src/hooks/useSessionAutoCleanup.ts

@@ -1,5 +1,5 @@
 import React from 'react';
-import type { Session } from '@opencode-ai/sdk';
+import type { Session } from '@opencode-ai/sdk/v2';
 import { useSessionStore } from '@/stores/useSessionStore';
 import { useUIStore } from '@/stores/useUIStore';