tier3: contracts + tests for 12 remaining modules (all 39 files now have Contracts)

org/gateway-tui-view.org

@@ -6,6 +6,17 @@
 Pure render functions. Each takes a Croatoan window and current state.
 State is read via ~(st :key)~ — no mutation here.
 
+** Contract
+
+1. (view-status win): renders the status bar with connection info,
+   version, and timestamp.
+2. (view-chat win): renders the scrolled chat message list. Messages
+   are color-coded: green (user), white (agent), yellow (system).
+3. (view-input win): renders the input line with cursor and typing
+   indicator.
+4. (redraw scr chat-win status-win input-win): dispatches redraws
+   based on ~(st :dirty)~ flags. Minimizes terminal writes.
+
 ** Status Bar
 #+begin_src lisp
 (in-package :passepartout.gateway-tui)