README: Verbrauch und Ein-Klick-Session in die Feature-Liste

Beides konnte die App längst, stand aber nur weiter unten zwischen den
Konzepten — für den Verbrauch gab es sogar einen Screenshot, aber keine
Zeile Text.

Zeitraum und Kostenangabe an der UI abgelesen: UsageList bietet 7 oder
30 Tage, die Spalte weist die Kosten als Schätzung aus.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

README.md

@@ -14,6 +14,8 @@ Pool, project, and session management for [Claude Code](https://claude.com/claud
 - **Command history** — every shell command the assistant hands you lands beside the terminal as a copyable tile, with the session's full command history one click away.
 - **Text panel** — Markdown drafts appear next to the terminal instead of scrolling past in the chat: readable, selectable, editable, and copyable in one go.
 - **Archive with full-text search** — keep drafts as Markdown files per project, curated with folder, description, and tags; browse them as a wiki and search their full text.
+- **What it costs** — tokens and estimated cost per login and project over the last 7 or 30 days, read straight from the session transcripts (retries deduplicated).
+- **One click, one session** — the tray popup lists every project with its icon and a green dot when it runs; a click starts it or brings the running terminal to the front.
 
 ## How it works