feat(trends): add 7-day period option

Add 'last_7' (Last 7 days) as a selectable period for all trends.
Changes are minimal since the period system is driven by PERIOD_CHOICES
and PERIOD_DAYS dicts — the rest of the infrastructure (views, templates,
Celery tasks, management commands) picks it up automatically.

- Add ('last_7', 'Last 7 days') to PERIOD_CHOICES in models.py
- Add 'last_7': 7 to PERIOD_DAYS in utils.py
- Migration 0004_alter_trendresult_period_add_last_7

PROJECT.org

@@ -88,7 +88,7 @@ fetching and simple saving.
 *** Metadata sources
 **** Scraper
 
-* Backlog [0/23] :vrobbler:project:personal:
+* Backlog [1/25] :vrobbler:project:personal:
 ** TODO [#C] After transition to linux add curl_cffi as webpage scrapper again :webpages:metadata:
 ** TODO [#C] Create small utility to clean up tracks scrobbled with wonky playback times :bug:music:scrobbles:
 :PROPERTIES:
@@ -601,6 +601,10 @@ The Edit log form should have from top to bottom:
 *** Description
 
 ** TODO [#A] Add trends tests for concurrent trends :trends:tests:concurrent:
+** DONE [#B] Add 7-day period for trends :trends:
+:PROPERTIES:
+:ID:       95731744-b0ec-175e-88dc-822cf9110292
+:END:
 * Version 61.3 [1/1]
 ** DONE [#A] Add trends tests and fix fasting :trends:tests:fasting:
 :PROPERTIES:

vrobbler/apps/trends/migrations/0004_alter_trendresult_period_add_last_7.py

@@ -0,0 +1,27 @@
+# Generated by Django 4.2.29 on 2026-07-19 19:39
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("trends", "0003_alter_trendresult_period"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="trendresult",
+            name="period",
+            field=models.CharField(
+                choices=[
+                    ("last_7", "Last 7 days"),
+                    ("last_30", "Last 30 days"),
+                    ("last_90", "Last 90 days"),
+                    ("last_year", "Last year"),
+                ],
+                default="last_30",
+                max_length=20,
+            ),
+        ),
+    ]

vrobbler/apps/trends/models.py

@@ -5,6 +5,7 @@ from django_extensions.db.models import TimeStampedModel
 User = get_user_model()
 
 PERIOD_CHOICES = [
+    ("last_7", "Last 7 days"),
     ("last_30", "Last 30 days"),
     ("last_90", "Last 90 days"),
     ("last_year", "Last year"),

vrobbler/apps/trends/utils.py

@@ -8,6 +8,7 @@ from trends.trends import TREND_REGISTRY
 logger = logging.getLogger(__name__)
 
 PERIOD_DAYS = {
+    "last_7": 7,
     "last_30": 30,
     "last_90": 90,
     "last_year": 365,