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/messages/en.json

@@ -132,6 +132,8 @@
 	"suggest_contextLabel": "Additional context for AI",
 	"suggest_contextOptional": "(optional)",
 	"suggest_contextPlaceholder": "e.g. party night, focusing on hydration...",
+	"suggest_leavingHomeLabel": "Going outside today",
+	"suggest_leavingHomeHint": "Affects SPF selection — checked: SPF50+, unchecked: SPF30.",
 	"suggest_minoxidilToggleLabel": "Prioritize beard/mustache density (minoxidil)",
 	"suggest_minoxidilToggleHint": "When enabled, AI will explicitly consider minoxidil for beard/mustache areas if available.",
 	"suggest_generateBtn": "Generate suggestion",

frontend/messages/pl.json

@@ -132,6 +132,8 @@
 	"suggest_contextLabel": "Dodatkowy kontekst dla AI",
 	"suggest_contextOptional": "(opcjonalny)",
 	"suggest_contextPlaceholder": "np. wieczór imprezowy, skupiam się na nawilżeniu...",
+	"suggest_leavingHomeLabel": "Wychodzę dziś z domu",
+	"suggest_leavingHomeHint": "Wpływa na wybór SPF — zaznaczone: SPF50+, odznaczone: SPF30.",
 	"suggest_minoxidilToggleLabel": "Priorytet: gęstość brody/wąsów (minoksydyl)",
 	"suggest_minoxidilToggleHint": "Po włączeniu AI jawnie uwzględni minoksydyl dla obszaru brody/wąsów, jeśli jest dostępny.",
 	"suggest_generateBtn": "Generuj propozycję",

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: {

frontend/src/routes/routines/suggest/+page.server.ts

@@ -15,6 +15,8 @@ export const actions: Actions = {
 		const part_of_day = form.get('part_of_day') as 'am' | 'pm';
 		const notes = (form.get('notes') as string) || undefined;
 		const include_minoxidil_beard = form.get('include_minoxidil_beard') === 'on';
+		const leaving_home =
+			part_of_day === 'am' ? form.get('leaving_home') === 'on' : undefined;
 
 		if (!routine_date || !part_of_day) {
 			return fail(400, { error: 'Data i pora dnia są wymagane.' });
@@ -25,7 +27,8 @@ export const actions: Actions = {
 				routine_date,
 				part_of_day,
 				notes,
-				include_minoxidil_beard
+				include_minoxidil_beard,
+				leaving_home
 			});
 			return { suggestion, routine_date, part_of_day };
 		} catch (e) {

frontend/src/routes/routines/suggest/+page.svelte

@@ -153,6 +153,20 @@
 								class="w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring resize-none"
 							></textarea>
 						</div>
+						{#if partOfDay === 'am'}
+						<div class="flex items-start gap-3 rounded-md border border-border px-3 py-2">
+							<input
+								id="single_leaving_home"
+								name="leaving_home"
+								type="checkbox"
+								class="mt-0.5 h-4 w-4 rounded border-input"
+							/>
+							<div class="space-y-0.5">
+								<Label for="single_leaving_home" class="font-medium">{m["suggest_leavingHomeLabel"]()}</Label>
+								<p class="text-xs text-muted-foreground">{m["suggest_leavingHomeHint"]()}</p>
+							</div>
+						</div>
+						{/if}
 						<div class="flex items-start gap-3 rounded-md border border-border px-3 py-2">
 							<input
 								id="single_include_minoxidil_beard"