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/components/chat/message/parts/AssistantTextPart.tsx

@@ -1,5 +1,5 @@
 import React from 'react';
-import type { Part } from '@opencode-ai/sdk';
+import type { Part } from '@opencode-ai/sdk/v2';
 import { MarkdownRenderer } from '../../MarkdownRenderer';
 import type { StreamPhase } from '../types';
 import type { ContentChangeReason } from '@/hooks/useChatScrollManager';

packages/ui/src/components/chat/message/parts/JustificationBlock.tsx

@@ -1,5 +1,5 @@
 import React from 'react';
-import type { Part } from '@opencode-ai/sdk';
+import type { Part } from '@opencode-ai/sdk/v2';
 import type { ContentChangeReason } from '@/hooks/useChatScrollManager';
 import { ReasoningTimelineBlock } from './ReasoningPart';
 

packages/ui/src/components/chat/message/parts/ProgressiveGroup.tsx

@@ -2,7 +2,7 @@ import React from 'react';
 import { RiArrowDownSLine, RiArrowRightSLine, RiStackLine } from '@remixicon/react';
 import { cn } from '@/lib/utils';
 import type { TurnActivityPart } from '../../hooks/useTurnGrouping';
-import type { ToolPart as ToolPartType } from '@opencode-ai/sdk';
+import type { ToolPart as ToolPartType } from '@opencode-ai/sdk/v2';
 import type { ContentChangeReason } from '@/hooks/useChatScrollManager';
 import type { ToolPopupContent } from '../types';
 import ToolPart from './ToolPart';

packages/ui/src/components/chat/message/parts/ReasoningPart.tsx

@@ -1,6 +1,6 @@
 import React from 'react';
 import type { ComponentType } from 'react';
-import type { Part } from '@opencode-ai/sdk';
+import type { Part } from '@opencode-ai/sdk/v2';
 import { RiArrowDownSLine, RiArrowRightSLine, RiBrainAi3Line, RiChatAi3Line } from '@remixicon/react';
 import { cn } from '@/lib/utils';
 import type { ContentChangeReason } from '@/hooks/useChatScrollManager';

packages/ui/src/components/chat/message/parts/ToolPart.tsx

@@ -5,7 +5,7 @@ import { RiArrowDownSLine, RiArrowRightSLine, RiBookLine, RiFileEditLine, RiFile
 import { cn } from '@/lib/utils';
 import { SimpleMarkdownRenderer } from '../../MarkdownRenderer';
 import { getToolMetadata, getLanguageFromExtension, isImageFile, getImageMimeType } from '@/lib/toolHelpers';
-import type { ToolPart as ToolPartType, ToolState as ToolStateUnion } from '@opencode-ai/sdk';
+import type { ToolPart as ToolPartType, ToolState as ToolStateUnion } from '@opencode-ai/sdk/v2';
 import { toolDisplayStyles } from '@/lib/typography';
 import { Prism as SyntaxHighlighter } from 'react-syntax-highlighter';
 import { useDirectoryStore } from '@/stores/useDirectoryStore';

packages/ui/src/components/chat/message/parts/UserTextPart.tsx

@@ -1,7 +1,7 @@
 import React from 'react';
 
 import { cn } from '@/lib/utils';
-import type { Part } from '@opencode-ai/sdk';
+import type { Part } from '@opencode-ai/sdk/v2';
 import type { AgentMentionInfo } from '../types';
 
 type PartWithText = Part & { text?: string; content?: string; value?: string };