Add shopper accounts, reviews, tracking, and seed_demo (#10)

## Summary
- Closes #9. Port shop-gated buyer accounts (register/login/profile, password reset, order history), purchase-gated reviews, and Stripe customer ids. Cards stay on Stripe.
- Slim public contact form to email + interest + message. Shipping tracking status, scan events, paste-in numbers, and EasyPost webhook when FEATURE_SHIPPING is on.
- Add template-neutral `seed_demo` (generic SKUs, demo shoppers, guest orders, tracking stubs). Prod refused. `--reset` deletes tagged demo rows after invoices.

## Test plan
- [ ] `cd site && uv run python manage.py test` (173 tests passed locally)
- [ ] Shop on: `/account/register`, login, profile, password reset, claim guest orders by email
- [ ] Shop off: `/account/` URLs absent; Sign in / Account links hidden
- [ ] Checkout as logged-in buyer stores `Order.user` and Stripe customer id; product review only after paid purchase
- [ ] Shipping on: portal paste-in tracking + EasyPost webhook updates status; shipping off: orders still work without tracking UI
- [ ] `seed_demo` refused in prod; `--reset` rebuilds tagged catalog/shoppers without deleting staff invoices

Reviewed-on: #10

site/public/forms.py

@@ -10,88 +10,9 @@ class ContactForm(forms.Form):
         ("other", "Something else"),
     ]
 
-    first_name = forms.CharField(
-        max_length=100,
-        widget=forms.TextInput(attrs={"class": "form-input", "id": "contact-first-name"}),
-    )
-    last_name = forms.CharField(
-        max_length=100,
-        required=False,
-        widget=forms.TextInput(attrs={"class": "form-input", "id": "contact-last-name"}),
-    )
     email = forms.EmailField(
         widget=forms.EmailInput(attrs={"class": "form-input", "id": "contact-email"}),
     )
-    phone = forms.CharField(
-        max_length=32,
-        required=False,
-        widget=forms.TextInput(attrs={"class": "form-input", "id": "contact-phone"}),
-    )
-    address_line1 = forms.CharField(
-        max_length=200,
-        required=False,
-        label="Street address",
-        widget=forms.TextInput(
-            attrs={
-                "class": "form-input",
-                "id": "contact-address-line1",
-                "autocomplete": "off",
-                "data-ac": "line1",
-            }
-        ),
-    )
-    address_line2 = forms.CharField(
-        max_length=200,
-        required=False,
-        label="Apt / suite",
-        widget=forms.TextInput(
-            attrs={
-                "class": "form-input",
-                "id": "contact-address-line2",
-                "autocomplete": "address-line2",
-                "data-ac": "line2",
-            }
-        ),
-    )
-    address_city = forms.CharField(
-        max_length=100,
-        required=False,
-        label="City",
-        widget=forms.TextInput(
-            attrs={
-                "class": "form-input",
-                "id": "contact-address-city",
-                "autocomplete": "address-level2",
-                "data-ac": "city",
-            }
-        ),
-    )
-    address_state = forms.CharField(
-        max_length=32,
-        required=False,
-        label="State",
-        widget=forms.TextInput(
-            attrs={
-                "class": "form-input",
-                "id": "contact-address-state",
-                "autocomplete": "address-level1",
-                "data-ac": "state",
-            }
-        ),
-    )
-    address_zip = forms.CharField(
-        max_length=20,
-        required=False,
-        label="ZIP",
-        widget=forms.TextInput(
-            attrs={
-                "class": "form-input",
-                "id": "contact-address-zip",
-                "autocomplete": "postal-code",
-                "data-ac": "zip",
-            }
-        ),
-    )
     interest = forms.ChoiceField(
         choices=INTEREST_CHOICES,
         widget=forms.Select(attrs={"class": "form-input", "id": "contact-interest"}),