feat(desktop): inline model picker in the status bar

Replace the status-bar model chip's modal with a Cursor-style dropdown:
- providers grouped by name in a stable order (no recency reshuffle on select)
- per-model hover-Edit submenu for reasoning effort + fast, gated by per-model
  capabilities now surfaced in the model.options payload
- unified Fast toggle: flips the speed=fast param where supported, else swaps
  to the model's `-fast` variant (base and variant collapse into one row)
- localStorage-backed "Edit Models" dialog to choose which models appear

Adds reusable dropdown primitives (DropdownMenuSearch, shared row/label
tokens, portaled + collision-aware submenus) and reads session state from
nanostores rather than prop-drilling, so editing options doesn't rebuild and
close the menu.

hermes_cli/web_server.py

@@ -1627,7 +1627,9 @@ def get_model_options():
     try:
         from hermes_cli.inventory import build_models_payload, load_picker_context
 
-        return build_models_payload(load_picker_context(), max_models=50, pricing=True)
+        return build_models_payload(
+            load_picker_context(), max_models=50, pricing=True, capabilities=True
+        )
     except Exception:
         _log.exception("GET /api/model/options failed")
         raise HTTPException(status_code=500, detail="Failed to list model options")