refactor: extract workspace layout actions and pane state logic

packages/app/src/utils/workspace-tab-identity.ts

@@ -0,0 +1,69 @@
+import type { WorkspaceTabTarget } from "@/stores/workspace-tabs-store";
+
+export function normalizeWorkspaceTabTarget(
+  value: WorkspaceTabTarget | null | undefined
+): WorkspaceTabTarget | null {
+  if (!value || typeof value !== "object" || typeof value.kind !== "string") {
+    return null;
+  }
+  if (value.kind === "draft") {
+    const draftId = trimNonEmpty(value.draftId);
+    return draftId ? { kind: "draft", draftId } : null;
+  }
+  if (value.kind === "agent") {
+    const agentId = trimNonEmpty(value.agentId);
+    return agentId ? { kind: "agent", agentId } : null;
+  }
+  if (value.kind === "terminal") {
+    const terminalId = trimNonEmpty(value.terminalId);
+    return terminalId ? { kind: "terminal", terminalId } : null;
+  }
+  if (value.kind === "file") {
+    const path = trimNonEmpty(value.path);
+    return path ? { kind: "file", path: path.replace(/\\/g, "/") } : null;
+  }
+  return null;
+}
+
+export function workspaceTabTargetsEqual(
+  left: WorkspaceTabTarget,
+  right: WorkspaceTabTarget
+): boolean {
+  if (left.kind !== right.kind) {
+    return false;
+  }
+  if (left.kind === "draft" && right.kind === "draft") {
+    return left.draftId === right.draftId;
+  }
+  if (left.kind === "agent" && right.kind === "agent") {
+    return left.agentId === right.agentId;
+  }
+  if (left.kind === "terminal" && right.kind === "terminal") {
+    return left.terminalId === right.terminalId;
+  }
+  if (left.kind === "file" && right.kind === "file") {
+    return left.path === right.path;
+  }
+  return false;
+}
+
+export function buildDeterministicWorkspaceTabId(target: WorkspaceTabTarget): string {
+  if (target.kind === "draft") {
+    return target.draftId;
+  }
+  if (target.kind === "agent") {
+    return `agent_${target.agentId}`;
+  }
+  if (target.kind === "terminal") {
+    return `terminal_${target.terminalId}`;
+  }
+  return `file_${target.path}`;
+}
+
+function trimNonEmpty(value: string | null | undefined): string | null {
+  if (typeof value !== "string") {
+    return null;
+  }
+  const trimmed = value.trim();
+  return trimmed.length > 0 ? trimmed : null;
+}