feat(backend): support container runtime paths

backend/src/tht/tht-runner.ts

@@ -6,6 +6,7 @@ export interface ThtConfig {
   thtBin: string;
   harnessDir: string;
   configPath: string;
+  dataRoot?: string;
 }
 
 export interface SessionRow {
@@ -61,8 +62,11 @@ export class ThtRunner {
 
   run(args: string[], workspace?: string): Promise<{ code: number; stdout: string; stderr: string }> {
     return new Promise((resolve) => {
+      const env: NodeJS.ProcessEnv = { ...process.env };
+      if (this.cfg.dataRoot !== undefined) env.THT_DATA_ROOT = this.cfg.dataRoot;
       const ch = spawn(this.cfg.thtBin, this.buildArgv(args, workspace), {
         cwd: this.cfg.harnessDir,
+        env,
       });
       let stdout = "";
       let stderr = "";