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/types.ts

@@ -149,6 +149,9 @@ export interface AgentInfo {
   tools?: string[] | null;
   source: "builtin" | "config" | "file";
   max_parallel?: number | null;
+  refine?: { rounds: number; model?: string | null; criteria?: string | null } | null;
+  /** Source file of Markdown agents. */
+  path?: string | null;
 }
 
 export interface Aggregate {