Move Iris to its standalone repository

AGENTS.md

@@ -1,7 +1,8 @@
 # ai-app
 
 A phone and desktop interface to AI coding sessions. The backend is Rust/Axum;
-the shared client and UI are Rust, drawn by the in-tree `iris` framework. The
+the shared client and UI are Rust, drawn by the `iris` framework pinned as a
+submodule. The
 Android app uses a thin Java activity and `android-view`; desktop uses winit.
 
 `docs/PLAN.md` is the design source of truth. Read it before structural work
@@ -32,12 +33,14 @@ dependency runs one way.
   contains Iris widget trees; `android` and `desktop` are thin hosts.
   `android-project/` packages the Rust cdylib. The `bench` feature and
   `bench-fixture/` are retained performance rigs, not a second app.
-- `iris/` — the framework, proc macro, tabs demo, and input rig.
+- `iris/` — the pinned framework submodule: proc macro, demos, and input rig.
 - `scripts/` — repository-wide scripts and independent profiling rigs.
-- `wg-app-link/` — a git submodule shared with dev-updater. Clone with
-  `--recurse-submodules` or run `git submodule update --init`.
+- `wg-app-link/` — a git submodule shared with dev-updater.
 - `docs/` — design and working documents.
 
+Clone with `--recurse-submodules` or run `git submodule update --init` to
+populate both `iris/` and `wg-app-link/`.
+
 Nerd Font icons are an app-owned committed subset. `app/build-icon-font.sh`
 produces `app/assets/fonts/nerd_icons.ttf`; its codepoints must match
 `app/src/ui/icon.rs`. The app registers it with Iris at startup. Body and