Add web terminal, git credentials, OpenSCAD, review loops, automations

- Web terminal (PTY over WebSocket, xterm.js, sandboxed, reattach with replay)
- Per-user git credentials and commit identity (credential store in the user's home)
- OpenSCAD tool (STL/3MF + preview renders, bounding box) and cad skill; 3D model card
- Craft phase inferred from tool activity when the agent does not report it
- Configurable review loop per mode (rounds, reviewer model, criteria)
- Delete config and Markdown agents from the agent editor
- Automations: cron-scheduled agents from Markdown job files, schedule tool, page
- change_directory tool (only on the user's request)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/components/Activity.tsx

@@ -112,7 +112,13 @@ export function ActivityLine({
     return (
       <div className="activity" role="status">
         <Dots />
-        <span>{kind === "model" ? t("chat.waitingModel", { model: what }) : t("chat.waitingSubagent", { agent: what === "*" ? t("chat.anySubagent") : what })}</span>
+        <span>
+          {kind === "review"
+            ? t("activity.reviewing", { round: what })
+            : kind === "model"
+              ? t("chat.waitingModel", { model: what })
+              : t("chat.waitingSubagent", { agent: what === "*" ? t("chat.anySubagent") : what })}
+        </span>
       </div>
     );
   }