bug: emoji reaction mapping not working in pre-beta-kiro snapshot

[chaodu-agent]

Root Cause Found

The pre-beta-* images are built using Dockerfile.unified (the workspace restructure), NOT the standard per-variant Dockerfiles. The unified binary compiles from crates/openab-core/src/discord.rs which is missing the reaction_add handler.

Missing Features in Unified Build

Feature	File	Status
reaction_add (emoji mapping)	crates/openab-core/src/discord.rs	❌ Not ported
archive_thread	crates/openab-core/src/discord.rs	❌ Not ported
ctl.rs (openab set/get IPC)	crates/openab-core/src/	❌ Missing module
allow_list.rs (pluggable allow-list)	crates/openab-core/src/	❌ Missing module

Evidence

# Original (src/discord.rs) — has reaction_add:
grep "async fn reaction_add" src/discord.rs
→ async fn reaction_add(&self, ctx: Context, reaction: Reaction) {

# Unified (crates/openab-core/src/discord.rs) — missing:
grep "async fn reaction_add" crates/openab-core/src/discord.rs
→ (no output)

Fix

Port reaction_add and archive_thread from src/discord.rs to crates/openab-core/src/discord.rs. Also port ctl.rs and allow_list.rs modules.

Workaround

Use openab:0.8.5 (stable) or per-variant images (openab:beta) built from the standard Dockerfile instead of pre-beta-* unified images.

[github-actions]

⚠️ This issue is missing the following required information and will not be processed until completed:

• Description
• Steps to Reproduce
• Expected Behavior

Please edit this issue to fill in the missing fields. Thank you!

Tip: Use headings like ## Description or ### Description — common synonyms (e.g. ## Problem, ## Reproduction, ## Motivation) are also accepted.