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/Sidebar.tsx

@@ -152,6 +152,14 @@ export function Sidebar({ open, activeId, section }: { open: boolean; activeId?:
           <Icon name="image" className="nav-icon" />
           {t("nav.images")}
         </button>
+        <button className={`ghost ${section === "terminal" ? "active" : ""}`} onClick={() => navigate("/terminal")}>
+          <Icon name="terminal" className="nav-icon" />
+          {t("nav.terminal")}
+        </button>
+        <button className={`ghost ${section === "jobs" ? "active" : ""}`} onClick={() => navigate("/jobs")}>
+          <Icon name="clock" className="nav-icon" />
+          {t("nav.jobs")}
+        </button>
         <button className={`ghost ${section === "stats" ? "active" : ""}`} onClick={() => navigate("/stats")}>
           <Icon name="chart" className="nav-icon" />
           {t("nav.stats")}