fix(app): shorten export filenames for long session titles (#60347)

Co-authored-by: [owner] <[owner]@gmail.com>
Co-authored-by: Daniel Smolsky <dannysmo@gmail.com>

packages/app/src/session/commands/export.test.ts

@@ -14,6 +14,10 @@ describe("sessionExportFilename", () => {
   ])("names %o as %s", (session, filename) => {
     expect(sessionExportFilename(session)).toBe(filename)
   })
+
+  test("shortens long titles to fit the filename limit", () => {
+    expect(sessionExportFilename({ id: "ses_123", title: "a".repeat(300) })).toBe(`${"a".repeat(250)}.json`)
+  })
 })
 
 describe("fetchSessionExport", () => {

packages/app/src/session/commands/export.ts

@@ -43,6 +43,7 @@ export function sessionExportFilename(session: { id: string; title?: string; slu
   const clean = name
     .toLowerCase()
     .replace(/[^a-z0-9_-]+/gi, "-")
+    .slice(0, 250)
     .replace(/^-+|-+$/g, "")
 
   return `${clean || session.id}.json`