Fix terminal snapshots reflowing after resize

Terminal snapshots now carry soft-wrap row metadata only to clients that advertise support, so restored output can resize like live output without breaking older clients.

packages/protocol/src/client-capabilities.ts

@@ -5,6 +5,12 @@ export const CLIENT_CAPS = {
   // outside the legacy set to "ShieldCheck" when this cap is absent. Drop the
   // gate when floor >= v0.1.84.
   customModeIcons: "custom_mode_icons",
+  // COMPAT(terminalReflowableSnapshot): added in v0.1.88. The daemon attaches
+  // per-row soft-wrap flags (gridWrapped/scrollbackWrapped) to terminal snapshots
+  // only when the client advertises this, so restored content can reflow on resize.
+  // Old clients use a strict TerminalState schema and would reject the extra fields.
+  // Drop the gate (always send the flags) when floor >= v0.1.88.
+  terminalReflowableSnapshot: "terminal_reflowable_snapshot",
 } as const;
 
 export type ClientCapability = (typeof CLIENT_CAPS)[keyof typeof CLIENT_CAPS];