Add HowLongToBeat estimates to game cards

- Fetch HLTB main/extra/completionist hours when a game item is saved
- Re-fetch only when name or category changes on edit
- Steam imports also fetch HLTB for each selected game
- Cards show compact HLTB row: "HLTB: 40h · +extra 60h · 100% 100h"
- Edit form shows HLTB breakdown as a hint next to Total hours field

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

backlogger/views.py

@@ -5,6 +5,7 @@ from django.urls import reverse
 from .models import Item
 from .forms import ItemForm, SignupForm
 from . import steam as steam_api
+from . import hltb as hltb_api
 
 
 def signup(request):
@@ -56,6 +57,7 @@ def item_add(request):
             item = form.save(commit=False)
             item.user = request.user
             item.save()
+            hltb_api.apply_to_item(item)
             return redirect('backlogger:list')
     else:
         form = ItemForm()
@@ -68,7 +70,9 @@ def item_edit(request, pk):
     if request.method == 'POST':
         form = ItemForm(request.POST, instance=item)
         if form.is_valid():
-            form.save()
+            updated = form.save()
+            if 'name' in form.changed_data or 'category' in form.changed_data:
+                hltb_api.apply_to_item(updated)
             return redirect('backlogger:list')
     else:
         form = ItemForm(instance=item)
@@ -139,13 +143,14 @@ def steam_import(request):
             continue
         hours = game['hours']
         progress = min(100.0, hours) if hours > 0 else 0.0
-        Item.objects.create(
+        item = Item.objects.create(
             user=request.user,
             category=Item.GAMES,
             name=game['name'],
             hours_played=hours,
             progress_percent=progress,
         )
+        hltb_api.apply_to_item(item)
         imported += 1
 
     del request.session['steam_games']