feat(session-manager): add version-gated SDK read path for OpenCode beta

- Add SDK client injection via setStorageClient()

- Version-gate getMainSessions(), getAllSessions(), readSessionMessages(), readSessionTodos()

- Add comprehensive tests for SDK path (beta mode)

- Maintain backward compatibility with JSON fallback

src/tools/session-manager/tools.ts

@@ -6,7 +6,7 @@ import {
   SESSION_SEARCH_DESCRIPTION,
   SESSION_INFO_DESCRIPTION,
 } from "./constants"
-import { getAllSessions, getMainSessions, getSessionInfo, readSessionMessages, readSessionTodos, sessionExists } from "./storage"
+import { getAllSessions, getMainSessions, getSessionInfo, readSessionMessages, readSessionTodos, sessionExists, setStorageClient } from "./storage"
 import {
   filterSessionsByDate,
   formatSessionInfo,
@@ -28,6 +28,9 @@ function withTimeout<T>(promise: Promise<T>, ms: number, operation: string): Pro
 }
 
 export function createSessionManagerTools(ctx: PluginInput): Record<string, ToolDefinition> {
+  // Initialize storage client for SDK-based operations (beta mode)
+  setStorageClient(ctx.client)
+
   const session_list: ToolDefinition = tool({
     description: SESSION_LIST_DESCRIPTION,
     args: {