feat: add economy/maximum presets, tool-lab and subagent-cursor extensions

- new economy and maximum agent presets with three-role pipeline skill
- new packages/extensions/tool-lab (home-lab ComfyUI/Docling/Whishper tools)
- new packages/subagent/subagent-cursor provider
- openrouter balance UI with on-demand refresh
- session projection context-seed boundary fold
- regenerate docs catalogs; keep local searxng benchmark scripts

apps/cli/config/agent-presets/code/agent.cordis.yml

@@ -198,12 +198,14 @@
         toolName: subagent_fork
         backgroundMode: continuable
 
-    # Production dsh does not install these optional providers. An opting-in
-    # Profile mounts each provider once on the host plane; copy this preset,
-    # then remove `disabled` from the matching tool row.
+    # External product agents. The base host plane mounts each provider, and
+    # each run needs that product's own CLI on PATH plus its own account:
+    # `codex`, `claude`, and `cursor-agent`. A missing CLI fails the call it is
+    # asked for rather than the composition, so a deployment without one keeps
+    # an inert tool row; copy this preset and add `disabled: true` to drop it
+    # from the model's roster entirely.
     - id: tool-subagent-codex
       name: '@deepseek-ai/dsh-tool-subagent'
-      disabled: true
       config:
         provider: codex
         toolName: subagent_codex
@@ -212,13 +214,20 @@
 
     - id: tool-subagent-claude-code
       name: '@deepseek-ai/dsh-tool-subagent'
-      disabled: true
       config:
         provider: claude-code
         toolName: subagent_claude_code
         backgroundMode: one-shot
         maxDepth: provider-managed
 
+    - id: tool-subagent-cursor
+      name: '@deepseek-ai/dsh-tool-subagent'
+      config:
+        provider: cursor
+        toolName: subagent_cursor
+        backgroundMode: one-shot
+        maxDepth: provider-managed
+
     - id: workflow-worker-thread
       name: '@deepseek-ai/dsh-workflow-worker-thread'
       config: