merge: combine pi-flow-native-brain + pi-ci-integrator into one post

Single public-facing post that tells the complete Pi autonomy story:
- Part 1: Retiring the hardcoded supervisor (1,050 lines deleted)
  replaced by composable oracle-backed pi-flows with 5 gates
  (build, test, behaviour, feel, visual)
- Part 2: The CI integrator — agents that watch CI, read failure
  logs, and fix their own broken builds (tinqs-ci extension)
- Combined stack: flow engine → gates → sub-agents → CI loop
- SVG gate pipeline + deletion bar diagrams preserved via
  build.js <!--raw--> passthrough
- Removed old separate pi-ci-integrator post; pi-flow-native-brain
  is now a proper .md source (replaces hand-authored HTML)

README.md

@@ -12,6 +12,8 @@ We're building Tinqs Studio while using it to make our own game --- a survival c
 - [Streaming a 12km Archipelago in Godot 4](posts/godot-optimisation.md) (2026-05-22)
 - [AI Art at Scale: Using fal.ai Flux for Game Asset Generation](posts/fal-image-generation.md) (2026-05-25)
 - [Tinqs Studio Is an Agent Harness for Game Dev](posts/agent-harness.md) (2026-05-25)
+- [Pi's Flow-Native Brain: Retiring the Supervisor, Teaching Agents to Fix Their Own Builds](posts/pi-flow-native-brain.md) (2026-06-03)
+- [Our Blog Just Got a Visual Upgrade — Here's How We Did It](posts/blog-visual-upgrade.md) (2026-06-03)
 
 ## Skills