story-kit: create 330_refactor_consolidate_chat_transports_into_a_chat_module_with_transport_submodules

.story_kit/work/1_backlog/330_refactor_consolidate_chat_transports_into_a_chat_module_with_transport_submodules.md

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+---
+name: "Consolidate chat transports into a chat module with transport submodules"
+---
+
+# Refactor 330: Consolidate chat transports into a chat module with transport submodules
+
+## Current State
+
+- TBD
+
+## Desired State
+
+The chat/transport code is scattered across the codebase: transport.rs at the top level, matrix/ as a module, whatsapp.rs and slack.rs as top-level files. Consolidate into a unified chat/ module:
+
+- chat/mod.rs — ChatTransport trait, shared types, command dispatch registry
+- chat/matrix/ — existing matrix/ module (bot.rs, commands/, htop.rs, transport_impl.rs, etc.)
+- chat/whatsapp.rs — WhatsApp transport (moved from src/whatsapp.rs)
+- chat/slack.rs — Slack transport (moved from src/slack.rs)
+
+This groups all chat-related code under one module with transport-specific implementations as submodules. The common code (trait, types, command registry) lives at the chat/ level and the platform-specific code lives in submodules.
+
+## Acceptance Criteria
+
+- [ ] transport.rs moved into chat/mod.rs (ChatTransport trait and shared types)
+- [ ] whatsapp.rs moved to chat/whatsapp.rs
+- [ ] slack.rs moved to chat/slack.rs
+- [ ] matrix/ moved to chat/matrix/
+- [ ] Command registry (commands/) accessible from chat/ level, not matrix-specific
+- [ ] All imports updated throughout the codebase
+- [ ] All existing tests pass
+- [ ] No public API changes from the perspective of main.rs and other modules
+
+## Out of Scope
+
+- TBD