Extract the Claude newline sequence and the session display name

app/src/lib/claudeInput.test.ts

@@ -0,0 +1,29 @@
+import { describe, it, expect } from "vitest";
+import { CLAUDE_SOFT_NEWLINE, toClaudePayload } from "./claudeInput";
+
+describe("toClaudePayload", () => {
+  it("is ESC+CR, the sequence Claude Code's own /terminal-setup installs", () => {
+    expect(CLAUDE_SOFT_NEWLINE).toBe("\x1b\r");
+  });
+
+  it("replaces every newline so the note arrives as one prompt", () => {
+    // Typed raw, each \n submits — the note would arrive as three truncated
+    // messages instead of one.
+    expect(toClaudePayload("one\ntwo\nthree")).toBe("one\x1b\rtwo\x1b\rthree");
+  });
+
+  it("normalises CRLF, which is what a paste from Windows carries", () => {
+    expect(toClaudePayload("one\r\ntwo")).toBe("one\x1b\rtwo");
+  });
+
+  it("leaves single-line text untouched", () => {
+    expect(toClaudePayload("just one line")).toBe("just one line");
+  });
+
+  it("never appends a terminator", () => {
+    // The note lands in the prompt unsubmitted; the user presses Enter. An
+    // unsent prompt is recoverable, a sent one is not.
+    expect(toClaudePayload("text").endsWith("\r")).toBe(false);
+    expect(toClaudePayload("text\n")).toBe("text\x1b\r");
+  });
+});