fix: eliminate WebGL re-render flicker during tab switch

Stop toggling WebGL renderer off/on around large buffer writes in
chunkedTerminalWrite(). The dispose+loadAddon cycle caused visible
re-render flashes and (before the deferred fix) synchronous GPU stalls
from ReadPixels blocking the main thread. Instead, keep WebGL active
and rely on 32KB chunked writes to keep per-frame render work under
~5ms.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -52,7 +52,7 @@ When user says "COM":
 4. **Sync CLAUDE.md version**: Update the `**Version**` line below to match the new version from `package.json`
 5. **Commit and deploy**: `git add -A && git commit -m "chore: version packages" && git push && npm run build && systemctl --user restart codeman-web`
 
-**Version**: 0.3.2 (must match `package.json`)
+**Version**: 0.3.3 (must match `package.json`)
 
 ## Project Overview
 
@@ -109,7 +109,7 @@ Codeman is a Claude Code session manager with web interface and autonomous Ralph
 | **Infra** | `src/hooks-config.ts`, `src/push-store.ts`, `src/tunnel-manager.ts`, `src/image-watcher.ts`, `src/file-stream-manager.ts` | |
 | **Plan** | `src/plan-orchestrator.ts`, `src/prompts/*.ts`, `src/templates/claude-md.ts` | |
 | **Web** | `src/web/server.ts`, `src/web/sse-events.ts`, `src/web/routes/*.ts` (13 modules), `src/web/ports/*.ts`, `src/web/middleware/auth.ts`, `src/web/schemas.ts` | |
-| **Frontend** | `src/web/public/app.js` ★ (~11.7K lines) + 9 JS modules | |
+| **Frontend** | `src/web/public/app.js` ★ (~11.8K lines) + 10 JS modules (incl. `sw.js` service worker) | |
 | **Types** | `src/types/index.ts` → 14 domain files | See `@fileoverview` in index.ts |
 
 ★ = Large file (>50KB). All files have `@fileoverview` JSDoc — read that before diving in.