v0.7.1: in-app password change, custom labels, always-on folders

- Settings -> Account: change your own password (current + new), session
  preserved via update_session_auth_hash.
- Custom labels: per-user palette in Settings -> Labels; apply/remove from a
  message's ... menu (menu stays open, checkmark = applied). Labels are unified
  with tags; chip colours sync to the global TagColor. New Label model +
  migration 0017; POST /a/{id}/label (session, owner-scoped, palette-validated).
- Sidebar Keep/Deleted folders are now always shown; count badge only when
  non-empty. Updates the stale 'hide when empty' note in CLAUDE.md.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

artifacts/views.py

@@ -15,8 +15,9 @@ import nh3
 import openpyxl
 from django.conf import settings
 from django.contrib import messages
-from django.contrib.auth import views as auth_views
+from django.contrib.auth import update_session_auth_hash, views as auth_views
 from django.contrib.auth.decorators import login_required
+from django.contrib.auth.forms import PasswordChangeForm
 from django.contrib.auth.models import User
 from django.db import OperationalError, transaction
 from django.db.models import Count, Max, Q, Sum
@@ -36,7 +37,7 @@ from rest_framework.views import APIView
 
 from .demo_data import create_demo_artifacts
 from .forms import AgentFeedLoginForm
-from .models import ApiKey, Artifact, Asset, TagColor
+from .models import ApiKey, Artifact, Asset, Label, TagColor
 from .storage import (
     QuotaExceeded,
     SIDECAR_SUFFIXES,
@@ -625,6 +626,7 @@ def feed(request):
             "today": today,
             "title_query": title_query,
             "kind_choices": Artifact.KIND_CHOICES,
+            "label_palette": request.user.labels.all(),
         },
     )
 
@@ -639,6 +641,31 @@ def mark_artifact_read(request, artifact_id):
     return JsonResponse({"id": artifact.id, "read_at": artifact.read_at.isoformat()})
 
 
+@login_required
+@require_POST
+def toggle_artifact_label(request, artifact_id):
+    """Toggle a palette label on/off for one of the user's own messages. The
+    label name is written into/removed from the artifact's `tags` list (labels
+    are unified with tags). Only names in the user's palette are accepted."""
+    artifact = get_object_or_404(Artifact, pk=artifact_id, owner=request.user, deleted_at__isnull=True)
+    name = (request.POST.get("name") or "").strip()
+    label = Label.objects.filter(user=request.user, name=name).first()
+    if label is None:
+        return JsonResponse({"error": "No such label in your palette."}, status=400)
+    tags = list(artifact.tags)
+    if name in tags:
+        tags.remove(name)
+        applied = False
+    else:
+        tags.append(name)
+        applied = True
+    artifact.tags = tags
+    artifact.save(update_fields=["tags"])
+    # Keep the chip colour in sync with the palette (TagColor is global).
+    TagColor.objects.update_or_create(name=name, defaults={"color": label.color})
+    return JsonResponse({"applied": applied, "name": name, "color": label.color, "tags": tags})
+
+
 @login_required
 @require_POST
 def toggle_artifact_keep(request, artifact_id):
@@ -1507,10 +1534,25 @@ def settings_home(request):
 
 @login_required
 def settings_account(request):
+    if request.method == "POST":
+        password_form = PasswordChangeForm(request.user, request.POST)
+        if password_form.is_valid():
+            user = password_form.save()
+            # Keep the current session valid — changing the password rotates the
+            # session auth hash, which would otherwise log the user out.
+            update_session_auth_hash(request, user)
+            messages.success(request, "Password changed.")
+            return redirect("settings-account")
+    else:
+        password_form = PasswordChangeForm(request.user)
     return render(
         request,
         "artifacts/settings_account.html",
-        {"active_section": "account", "key_count": request.user.api_keys.count()},
+        {
+            "active_section": "account",
+            "key_count": request.user.api_keys.count(),
+            "password_form": password_form,
+        },
     )
 
 
@@ -1540,6 +1582,49 @@ def settings_api_keys(request):
     )
 
 
+LABEL_HEX_RE = re.compile(r"^#[0-9a-fA-F]{6}$")
+
+
+@login_required
+def settings_labels(request):
+    if request.method == "POST":
+        action = request.POST.get("action")
+        if action == "create":
+            name = (request.POST.get("name") or "").strip()
+            color = (request.POST.get("color") or "").strip()
+            if not name:
+                messages.error(request, "Give the label a name.")
+            elif not LABEL_HEX_RE.match(color):
+                messages.error(request, "Pick a colour (#RRGGBB).")
+            elif Label.objects.filter(user=request.user, name=name).exists():
+                messages.error(request, f"You already have a label called '{name}'.")
+            else:
+                Label.objects.create(user=request.user, name=name, color=color)
+                TagColor.objects.update_or_create(name=name, defaults={"color": color})
+                messages.success(request, f"Created label '{name}'.")
+        elif action == "update":
+            color = (request.POST.get("color") or "").strip()
+            label = Label.objects.filter(pk=request.POST.get("label_id") or "", user=request.user).first()
+            if label is None:
+                messages.error(request, "No such label.")
+            elif not LABEL_HEX_RE.match(color):
+                messages.error(request, "Pick a colour (#RRGGBB).")
+            else:
+                label.color = color
+                label.save(update_fields=["color"])
+                TagColor.objects.update_or_create(name=label.name, defaults={"color": color})
+                messages.success(request, f"Updated '{label.name}'.")
+        elif action == "delete":
+            deleted, _ = Label.objects.filter(pk=request.POST.get("label_id") or "", user=request.user).delete()
+            messages.success(request, "Label removed from your palette.") if deleted else messages.error(request, "No such label.")
+        return redirect("settings-labels")
+    return render(
+        request,
+        "artifacts/settings_labels.html",
+        {"active_section": "labels", "labels": request.user.labels.all()},
+    )
+
+
 @login_required
 def settings_users(request):
     if not request.user.is_superuser: