docs: restructure bootstrap, add module references, and normalize docs

documentation/MODULE__AE_IDAA_Bulletin_Board.md

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+# Aether IDAA — Bulletin Board Module
+
+**Status:** Active (private)
+**Routes:** `src/routes/idaa/(idaa)/bb/`
+**Underlying library:** `src/lib/ae_posts/`
+
+The IDAA Bulletin Board (BB) is a private community posting and comment system for authenticated IDAA users.
+
+---
+
+## Core Responsibilities
+
+- Post list and post detail flows.
+- Comment create/edit workflows.
+- Priority/visibility and sort behavior aligned with IDAA privacy and moderation rules.
+
+---
+
+## Security Requirements
+
+- All BB routes are private/authenticated.
+- Do not weaken layout-level auth gating.
+- Treat any public exposure of BB data as Sev-1.
+
+---
+
+## Route Map
+
+- `/idaa/bb`
+- `/idaa/bb/[post_id]`
+
+---
+
+## Related Docs
+
+- `documentation/CLIENT__IDAA_and_customized_mods.md`
+- `documentation/AE__Permissions_and_Security.md`
+- `documentation/REFERENCE__Common_Agent_Mistakes.md`