fix: add HTMX 422 response handling and missing form name attrs

- Configure HTMX to swap 422 responses so validation errors display
- Add missing name="notes" to egg harvest and product sold forms

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/animaltrack/web/app.py

@@ -5,7 +5,7 @@ from __future__ import annotations
 
 from pathlib import Path
 
-from fasthtml.common import Beforeware, fast_app
+from fasthtml.common import Beforeware, Meta, fast_app
 from monsterui.all import Theme
 from starlette.middleware import Middleware
 from starlette.requests import Request
@@ -123,10 +123,17 @@ def create_app(
     # So static_path should be the parent of static_base
     static_path_for_fasthtml = str(static_base.parent) if static_base.exists() else "."
 
+    # Configure HTMX to swap 422 responses for validation errors
+    # Without this, hx-boost ignores non-2xx responses and errors appear to do nothing
+    htmx_config = Meta(
+        name="htmx-config",
+        content='{"responseHandling":[{"code":"204","swap":false},{"code":"[23]..","swap":true},{"code":"422","swap":true},{"code":"[45]..","swap":false,"error":true}]}',
+    )
+
     # Create FastHTML app with HTMX extensions, MonsterUI theme, and static path
     app, rt = fast_app(
         before=beforeware,
-        hdrs=Theme.slate.headers(),  # Dark industrial theme
+        hdrs=(*Theme.slate.headers(), htmx_config),  # Dark industrial theme + HTMX config
         exts=["head-support", "preload"],
         static_path=static_path_for_fasthtml,
         middleware=[Middleware(StaticCacheMiddleware)],

src/animaltrack/web/templates/eggs.py

@@ -160,6 +160,7 @@ def harvest_form(
         LabelTextArea(
             "Notes",
             id="notes",
+            name="notes",
             placeholder="Optional notes",
         ),
         # Hidden nonce for idempotency

src/animaltrack/web/templates/products.py

@@ -99,6 +99,7 @@ def product_sold_form(
         LabelTextArea(
             "Notes",
             id="notes",
+            name="notes",
             placeholder="Optional notes",
         ),
         # Hidden nonce for idempotency