Add a world-state edit mode for overriding live RPG values

Players/authors can now directly correct the live values of stats the
schema already defines (health, trust, flags, milestones, etc.) without
waiting for the AI to emit a delta. New apply_override() sets values
absolutely rather than adding deltas, and — unlike the AI-facing
apply_delta() — bypasses cooldown/max_delta_per_turn and lets
milestones be un-set, since this is a deliberate correction rather
than a turn to police. Exposed via PUT /adventures/{id}/world-state
and an edit toggle in the World State drawer. Also fixes the
schema-editor stat-kind dropdown and free-text initial-value input
to size consistently with the numeric fields next to them.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/src/api.js

@@ -81,6 +81,8 @@ export const api = {
   getAdventure: (id) => request(`/adventures/${id}`),
   getScriptState: (id) => request(`/adventures/${id}/script-state`),
   getWorldState: (id) => request(`/adventures/${id}/world-state`),
+  overrideWorldState: (id, overrides) =>
+    request(`/adventures/${id}/world-state`, { method: 'PUT', body: JSON.stringify(overrides) }),
   createAdventure: (data) => request('/adventures', { method: 'POST', body: JSON.stringify(data) }),
   updateAdventure: (id, data) => request(`/adventures/${id}`, { method: 'PATCH', body: JSON.stringify(data) }),
   deleteAdventure: (id) => request(`/adventures/${id}`, { method: 'DELETE' }),