- DeckyServiceAddRequest gains an optional `config: dict` field, validated
against the service's config_schema before any state mutation (400 on
bad type, no half-written rows).
- Engine: add_service threads `config` into _add_topology_service /
_add_fleet_service, persisting validated cfg to decky_config.service_config
BEFORE compose regen so the first `up -d --build` materialises the env on
the new container. No follow-up apply needed.
- Frontend: shared AddServiceConfigModal — same wizard accordion shape, used by:
* DeckyCard's ADD SERVICE picker (Fleet & MazeNET inspectors via shared component)
* MazeNET Inspector's ADD SERVICE picker
* MazeNET palette drag-drop onto a deployed decky
Empty-schema services short-circuit to a one-click add (no modal flash).
Operator can cancel; errors surface in the modal.
- Tests: add_service config plumbing — persist, drop unknown keys, 400-equivalent
on bad types, back-compat empty-config.
- Drive-by: fix stale repo-method names in test_services_live.py
(create_topology_decky → add_topology_decky, get_topology_decky → list+pick helper,
service.added → service_added topic).