dsh-web-attention-badge-enhanced: Add triple session reminders to DSH Web UI

This article introduces the attention badge plugin `nbfys/dsh-web-attention-badge-enhanced` for the DeepSeek Harness (DSH) Web UI, which is an enhanced fork of `Luaphes/dsh-web-attention-badge`. When a session is waiting for user input (e.g., `ask_user` prompts, approval hints) or has been completed but not opened, the plugin provides reminders via three channels: a clickable number badge in the top-left corner, tab title prefixes `[Waiting]`/`[Done]`, and whale favicon recoloring; amber indicates waiting for input, while green indicates completion. Compared to the upstream v0.3.2, the changes are concentrated in `lib/client.js` in three locations: replacing the count with tab title prefixes,