Watch: notification switches, a model list and Ask before acting on new threads, and Ask before acting on a thread

watch/README.md

@@ -55,7 +55,8 @@ xcrun simctl launch <udid> org.gbrown.wristcode.watchkitapp -demo -screen notifi
 
 `screenshots/` holds the screens captured this way. The complication, the multi-select question, the
 status screens, the subagent card and thread, Recent with Settle all and the "N more" row, the full
-Recent list, and a finished thread with Settle are rendered by `SnapshotTests` instead, which only run when given a directory:
+Recent list, a finished thread with Settle, a running thread with Ask before acting, and New thread
+with its model list are rendered by `SnapshotTests` instead, which only run when given a directory:
 
 ```sh
 TEST_RUNNER_WC_SCREENSHOT_DIR=$PWD/screenshots xcodebuild -scheme WristCode \
@@ -88,8 +89,23 @@ The gear at the top left of the feed opens the status overview (`GET /v1/status`
 "All connected" or "Needs attention", lists only the issues worst first (offline hosts, a host on a
 fallback route, tokens expiring within 7 days, push problems), and folds the healthy hosts into one
 row. Each host opens its route ladder with Reconnect. The Notifications row shows whether this watch
-is registered, the last push, Send test, the gateway, and Unpair. Each screen loads once when it
-appears; nothing polls.
+is registered, the last push, a switch per kind of push (Needs me, Finished, Failed, Subagents ask),
+Send test, the gateway, and Unpair. A switch flips at once and sends only its own key with
+`PUT /v1/device/notifications`. If that fails, it flips back and the error shows under the switches.
+Host problems always notify. Each screen loads once when it appears; nothing polls.
+
+## Models and Ask before acting
+
+On New thread, the Agent row opens every model the host offers, grouped by provider, with the
+project default's provider first. The watch remembers the last pick per host and falls back to the
+project's default when the host stops offering it. It sends `model` only when the pick differs from
+the default, so the default keeps its options, such as reasoning effort. The Ask before acting switch
+under it remembers its last value. It is hidden, and the thread starts with `askFirst: false`, when
+the provider cannot ask first.
+
+A thread's screen has the same switch between Reply and Stop. It flips at once and posts
+`/v1/threads/:hostId/:threadId/mode`. If that fails, it flips back and the error shows under it.
+Against a gateway older than these routes, the switches and the model list stay hidden.
 
 ## Complication