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/Files.tsx

@@ -140,6 +140,16 @@ export function Files({ onMenu }: { onMenu: () => void }) {
     }
   };
 
+  // "Edit file" links from other pages (e.g. automations) open the file directly.
+  useEffect(() => {
+    const target = sessionStorage.getItem("codecraft.openFile");
+    if (!target) return;
+    sessionStorage.removeItem("codecraft.openFile");
+    setDir(target.slice(0, target.lastIndexOf("/")) || "/");
+    void openFile(target);
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
   const save = useCallback(
     async (force = false) => {
       if (pane.kind !== "file") return;