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/session/DirectoryTree.tsx

@@ -400,10 +400,8 @@ export const DirectoryTree: React.FC<DirectoryTreeProps> = ({
 
         const tempClient = opencodeClient.getApiClient();
         const response = await tempClient.file.list({
-          query: {
-            path: '.',
-            directory: path
-          }
+          path: '.',
+          directory: path
         });
 
         if (!response.data) {

packages/ui/src/components/session/SessionDialogs.tsx

@@ -25,7 +25,7 @@ import { RiCheckboxBlankLine, RiCheckboxLine, RiDeleteBinLine } from '@remixicon
 import { MobileOverlayPanel } from '@/components/ui/MobileOverlayPanel';
 import { DirectoryExplorerDialog } from './DirectoryExplorerDialog';
 import { cn, formatPathForDisplay } from '@/lib/utils';
-import type { Session } from '@opencode-ai/sdk';
+import type { Session } from '@opencode-ai/sdk/v2';
 import type { WorktreeMetadata } from '@/types/worktree';
 import {
     archiveWorktree,

packages/ui/src/components/session/SessionSidebar.tsx

@@ -1,5 +1,5 @@
 import React from 'react';
-import type { Session } from '@opencode-ai/sdk';
+import type { Session } from '@opencode-ai/sdk/v2';
 import { toast } from 'sonner';
 import {
   DropdownMenu,