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/server/src/terminal/terminal-session-controller.ts

@@ -65,6 +65,10 @@ export interface TerminalSessionControllerOptions {
   hasBinaryChannel: () => boolean;
   isPathWithinRoot: (rootPath: string, candidatePath: string) => boolean;
   sessionLogger: pino.Logger;
+  // Whether the connected client can reflow restored snapshots. When true the
+  // daemon attaches per-row soft-wrap flags to snapshots; otherwise it omits them
+  // so old (strict-schema) clients still parse the snapshot.
+  clientSupportsWrapReflow?: () => boolean;
 }
 
 export interface TerminalSessionControllerMetrics {
@@ -104,6 +108,7 @@ export class TerminalSessionController {
   private readonly hasBinaryChannel: () => boolean;
   private readonly isPathWithinRoot: (rootPath: string, candidatePath: string) => boolean;
   private readonly sessionLogger: pino.Logger;
+  private readonly clientSupportsWrapReflow: () => boolean;
 
   private readonly subscribedDirectories = new Set<string>();
   private unsubscribeTerminalsChanged: (() => void) | null = null;
@@ -119,6 +124,7 @@ export class TerminalSessionController {
     this.hasBinaryChannel = options.hasBinaryChannel;
     this.isPathWithinRoot = options.isPathWithinRoot;
     this.sessionLogger = options.sessionLogger;
+    this.clientSupportsWrapReflow = options.clientSupportsWrapReflow ?? (() => false);
   }
 
   start(): void {
@@ -801,7 +807,9 @@ export class TerminalSessionController {
     activeStream: ActiveTerminalStream,
     terminalManager: TerminalManager,
   ): Promise<SnapshotSendResult> {
-    const snapshot = await terminalManager.getTerminalState(activeStream.terminalId);
+    const snapshot = await terminalManager.getTerminalState(activeStream.terminalId, {
+      includeWrapFlags: this.clientSupportsWrapReflow(),
+    });
     if (this.activeStreams.get(activeStream.slot) !== activeStream) {
       return { shouldContinue: false };
     }
@@ -829,10 +837,10 @@ export class TerminalSessionController {
       return { shouldContinue: true };
     }
 
-    const snapshot = await terminalManager.getTerminalState(
-      activeStream.terminalId,
-      snapshotOptions,
-    );
+    const snapshot = await terminalManager.getTerminalState(activeStream.terminalId, {
+      ...snapshotOptions,
+      includeWrapFlags: this.clientSupportsWrapReflow(),
+    });
     if (this.activeStreams.get(activeStream.slot) !== activeStream) {
       return { shouldContinue: false };
     }