[Init] Initial commit - NetMesh terminal manager

application/state/resolveCloseIntent.ts

@@ -0,0 +1,34 @@
+export type CloseIntent =
+  | { kind: 'closeTerminal'; sessionId: string }
+  | { kind: 'closeWorkspace'; workspaceId: string }
+  | { kind: 'closeSingleTab'; sessionId: string }
+  | { kind: 'noop' };
+
+export interface ResolveCloseInput {
+  activeTabId: string | null;
+  workspace: { id: string; focusedSessionId?: string } | null;
+  sessionForTab: { id: string } | null;
+  focusIsInsideTerminal: boolean;
+}
+
+export function resolveCloseIntent(input: ResolveCloseInput): CloseIntent {
+  const { activeTabId, workspace, sessionForTab, focusIsInsideTerminal } = input;
+
+  if (!activeTabId) return { kind: 'noop' };
+
+  if (sessionForTab && !workspace) {
+    return { kind: 'closeSingleTab', sessionId: sessionForTab.id };
+  }
+
+  if (!workspace) {
+    // e.g. 'vault', 'sftp', or any non-closable pinned tab
+    return { kind: 'noop' };
+  }
+
+  const focusedSessionId = workspace.focusedSessionId;
+  if (focusedSessionId && focusIsInsideTerminal) {
+    return { kind: 'closeTerminal', sessionId: focusedSessionId };
+  }
+
+  return { kind: 'closeWorkspace', workspaceId: workspace.id };
+}