Give each Coach answer one action row and keep its chips in its column

Under an answer: copy, read aloud, try again and the time as text on the
left; tokens and model on the right, on one line down to 390 px. The
thumbs leave the web (the feedback route stays for the native client),
and so does the "What I'm looking at" disclosure: the method line and
the tables the answer read move into the steps list, and an older
message without steps lists the areas it drew on, never a raw key.

Remember becomes a bookmark icon in the question's row and confirms in
place with a toast. Follow-up chips render inside the latest answer's
column at its text size. The answer column takes the full width below
`sm` and a fixed 80 % above, so nothing moves sideways as a reply
streams. A round button fades in when the thread is scrolled away from
the end and brings it back.

src/__tests__/success-affordance-guard.test.ts

@@ -173,7 +173,14 @@ const PINNED_AFFORDANCES: Record<
     CheckCircle2: 2,
     "toast.success": 1,
   },
-  "src/components/insights/coach-panel/chat-bubble.tsx": { "text-success": 4 },
+  // The Coach message action row: the copy tick after the clipboard write
+  // resolved, and the remember icon and toast only for the self-context entry
+  // the tap wrote (`adopted`); an entry that was already there gets a neutral
+  // icon and `toast.info`.
+  "src/components/insights/coach-panel/message-actions.tsx": {
+    "text-success": 2,
+    "toast.success": 1,
+  },
   // The copy tick on a result table: shown only after the clipboard write
   // resolved, so it reports a copy that happened; nothing is written to the
   // record.