feat: add TUI environment variables to stack deployments

- Pass TERM=xterm-256color for 256-color terminal support
- Pass COLORTERM=truecolor for 24-bit color support
- Pass LANG and LC_ALL for proper Unicode rendering
- Update ROADMAP.md with TUI feature planning and cleanup automation

src/orchestrator/production-deployer.ts

@@ -288,6 +288,11 @@ export class ProductionDeployer {
       `USAGE_LOGGING_ENABLED=true`,
       `LOG_INGEST_URL=${process.env.LOG_INGEST_URL || 'http://10.100.0.20:3102/ingest'}`,
       `METRICS_PORT=9090`,
+      // TUI Support: Terminal environment for proper TUI rendering in web browser
+      `TERM=xterm-256color`,
+      `COLORTERM=truecolor`,
+      `LANG=en_US.UTF-8`,
+      `LC_ALL=en_US.UTF-8`,
     ].join('\n');
 
     await this.client.setApplicationEnv(state.resources.applicationId, envVars);