refactor(routines): streamline suggest prompt — merge inventory context, add leaving_home SPF hint

- Remove _build_inventory_context; fold pao_months into DOSTĘPNE PRODUKTY entries
- Remove "Otwarte równolegle" duplicate section from prompt
- Rename OSTATNIE RUTYNY (7 dni) → OSTATNIE RUTYNY
- Add _build_day_context and SuggestRoutineRequest.leaving_home (optional bool)
- System prompt: replace unconditional PAO rule with conditional; add SPF factor
  selection logic based on KONTEKST DNIA leaving_home value
- Frontend: leaving_home checkbox (AM only) + i18n keys pl/en

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/lib/api.ts

@@ -142,6 +142,7 @@ export const suggestRoutine = (body: {
 	part_of_day: PartOfDay;
 	notes?: string;
 	include_minoxidil_beard?: boolean;
+	leaving_home?: boolean;
 }): Promise<RoutineSuggestion> => api.post('/routines/suggest', body);
 
 export const suggestBatch = (body: {