test(e2e): drive the TUI keyless smoke through the cross-platform PTY harness

The smoke's inline Python pty driver only ran on POSIX (no termios on
Windows). Rebuild every scenario — banner sweep, scripted conversation with
model switch, /skill:, Code Mode overlay, resume failure, and the dsh CLI
suite (default boot, personal overlay, invalid overlay, --resume flag,
source-path prompt) — as marker-gated action lists on pty-harness.ts, which
drives ConPTY via node-pty on Windows and the Python driver elsewhere. The
harness gains configArgs (bins with built-in default configs), prepare
(workspace seeding), and inspect (post-run log assertions); examples/
declares the session-title provider the shipped cordis.yml now mounts.

pnpm-lock.yaml

@@ -188,6 +188,9 @@ importers:
       '@deepseek-ai/dsh-session-persistence-jsonl':
         specifier: workspace:*
         version: link:../packages/session-persistence/session-persistence-jsonl
+      '@deepseek-ai/dsh-session-title-first-message-llm':
+        specifier: workspace:*
+        version: link:../packages/session-title/session-title-first-message-llm
       '@deepseek-ai/dsh-spill-local':
         specifier: workspace:*
         version: link:../packages/spill/spill-local