Fix egg sale form: remove duplicate route, change price to euros

The egg sale form had two issues:
- Duplicate POST /actions/product-sold route in products.py was
  overwriting the eggs.py handler, causing incomplete page responses
  (no tabs, no recent sales list)
- Price input used cents while feed purchase uses euros, inconsistent UX

Changes:
- Remove duplicate handler from products.py (keep only redirect)
- Change sell form price input from cents to euros (consistent with feed)
- Parse euros in handler, convert to cents for storage
- Add TestEggSale class with 4 tests for the fixed behavior

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/test_web_products_sold.py

@@ -59,10 +59,10 @@ class TestProductSoldFormRendering:
         assert 'name="quantity"' in resp.text or 'id="quantity"' in resp.text
 
     def test_sell_form_has_total_price_field(self, client):
-        """Form has total_price_cents input field."""
+        """Form has total_price_euros input field."""
         resp = client.get("/sell")
         assert resp.status_code == 200
-        assert 'name="total_price_cents"' in resp.text or 'id="total_price_cents"' in resp.text
+        assert 'name="total_price_euros"' in resp.text or 'id="total_price_euros"' in resp.text
 
     def test_sell_form_has_buyer_field(self, client):
         """Form has optional buyer input field."""
@@ -89,7 +89,7 @@ class TestProductSold:
             data={
                 "product_code": "egg.duck",
                 "quantity": "30",
-                "total_price_cents": "1500",
+                "total_price_euros": "15.00",
                 "buyer": "Local Market",
                 "notes": "Weekly sale",
                 "nonce": "test-nonce-sold-1",
@@ -113,7 +113,7 @@ class TestProductSold:
             data={
                 "product_code": "egg.duck",
                 "quantity": "30",
-                "total_price_cents": "1500",
+                "total_price_euros": "15.00",
                 "nonce": "test-nonce-sold-2",
             },
         )
@@ -136,7 +136,7 @@ class TestProductSold:
             data={
                 "product_code": "egg.duck",
                 "quantity": "3",
-                "total_price_cents": "1000",
+                "total_price_euros": "10.00",
                 "nonce": "test-nonce-sold-3",
             },
         )
@@ -158,7 +158,7 @@ class TestProductSold:
             data={
                 "product_code": "egg.duck",
                 "quantity": "0",
-                "total_price_cents": "1000",
+                "total_price_euros": "10.00",
                 "nonce": "test-nonce-sold-4",
             },
         )
@@ -172,7 +172,7 @@ class TestProductSold:
             data={
                 "product_code": "egg.duck",
                 "quantity": "-1",
-                "total_price_cents": "1000",
+                "total_price_euros": "10.00",
                 "nonce": "test-nonce-sold-5",
             },
         )
@@ -186,7 +186,7 @@ class TestProductSold:
             data={
                 "product_code": "egg.duck",
                 "quantity": "10",
-                "total_price_cents": "-100",
+                "total_price_euros": "-1.00",
                 "nonce": "test-nonce-sold-6",
             },
         )
@@ -199,7 +199,7 @@ class TestProductSold:
             "/actions/product-sold",
             data={
                 "quantity": "10",
-                "total_price_cents": "1000",
+                "total_price_euros": "10.00",
                 "nonce": "test-nonce-sold-7",
             },
         )
@@ -213,30 +213,29 @@ class TestProductSold:
             data={
                 "product_code": "invalid.product",
                 "quantity": "10",
-                "total_price_cents": "1000",
+                "total_price_euros": "10.00",
                 "nonce": "test-nonce-sold-8",
             },
         )
 
         assert resp.status_code == 422
 
-    def test_product_sold_success_shows_toast(self, client):
-        """Successful sale returns response with toast trigger."""
+    def test_product_sold_success_returns_full_page(self, client):
+        """Successful sale returns full eggs page with tabs."""
         resp = client.post(
             "/actions/product-sold",
             data={
                 "product_code": "egg.duck",
                 "quantity": "12",
-                "total_price_cents": "600",
+                "total_price_euros": "6.00",
                 "nonce": "test-nonce-sold-9",
             },
         )
 
         assert resp.status_code == 200
-        # Check for HX-Trigger header with showToast
-        hx_trigger = resp.headers.get("HX-Trigger")
-        assert hx_trigger is not None
-        assert "showToast" in hx_trigger
+        # Should return full eggs page with tabs (toast via session)
+        assert "Harvest" in resp.text
+        assert "Sell" in resp.text
 
     def test_product_sold_optional_buyer(self, client, seeded_db):
         """Buyer field is optional."""
@@ -245,7 +244,7 @@ class TestProductSold:
             data={
                 "product_code": "egg.duck",
                 "quantity": "10",
-                "total_price_cents": "500",
+                "total_price_euros": "5.00",
                 "nonce": "test-nonce-sold-10",
             },
         )
@@ -265,7 +264,7 @@ class TestProductSold:
             data={
                 "product_code": "egg.duck",
                 "quantity": "10",
-                "total_price_cents": "500",
+                "total_price_euros": "5.00",
                 "buyer": "Test Buyer",
                 "nonce": "test-nonce-sold-11",
             },