feat(assistant): expenses, shares, wind, journey tracks and Dawarich checks as MCP tools

- list_budget_items lists a trip's expenses with their ids, payers and
  splits, page by page so no page is cut down on its way to a model;
  get_budget_per_person answers who paid and owes what. Both in a new
  budget-items.mcp.ts, checked like their REST twins.
- get_wind_forecast reads the hourly wind, gusts and direction of a day.
- get_journey_tracks lists a journey's GPX tracks; the line for drawing
  rides under a key the provider never receives.
- The Dawarich wishlist scan and the countries the recordings suggest
  become tools, with their confirming writes, in DawarichAtlasMcp in the
  Atlas group; the shared time window check refuses alike on REST and
  MCP, and the model never sees when the user was last seen in a city.
- The journal's map, tracks and recorded days load with the journey
  group instead of riding in the core of every step.
- The prompt points at list_budget_items for expense ids (the trip
  summary never carried them) and names the shares and the wind tools;
  each new read has its own live step.

client/scripts/i18n-keys.mjs

@@ -139,6 +139,13 @@ export const DYNAMIC_ALLOWED = [
           'memories.* key in en',
       }))
   ),
+  {
+    file: 'components/Assistant/AssistantChangeCard.tsx',
+    template: 'assistant.tool.${tool}',
+    because:
+      'tool is the MCP tool a change card is for; verbLabel shows assistant.tool.<tool> only where en names ' +
+      'that tool, and the generic add, change or remove verb for every other tool',
+  },
 ];
 
 const KEY_RE = /^[a-z][a-zA-Z0-9_]*(?:\.[a-zA-Z0-9_:-]+)+$/;