feat: add notes field to 7 forms missing it

Added optional notes field to forms that support it in their payloads
but were missing the UI input:
- cohort_form (Create Animal Cohort)
- hatch_form (Record Hatch)
- promote_form (Promote Animal)
- tag_add_form (Add Tag)
- tag_end_form (End Tag)
- attrs_form (Update Attributes)
- move_form (Move Animals)

Uses consistent LabelTextArea pattern matching existing forms like
outcome_form and status_correct_form.

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

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

src/animaltrack/web/templates/actions.py

@@ -268,6 +268,13 @@ def cohort_form(
             id="origin",
             name="origin",
         ),
+        # Optional notes
+        LabelTextArea(
+            "Notes",
+            id="notes",
+            name="notes",
+            placeholder="Optional notes",
+        ),
         # Event datetime picker (for backdating)
         event_datetime_field("cohort_datetime", datetime_value, datetime_ts),
         # Hidden nonce for idempotency
@@ -386,6 +393,13 @@ def hatch_form(
                 cls="text-xs text-stone-400 mt-1",
             ),
         ),
+        # Optional notes
+        LabelTextArea(
+            "Notes",
+            id="notes",
+            name="notes",
+            placeholder="Optional notes",
+        ),
         # Event datetime picker (for backdating)
         event_datetime_field("hatch_datetime"),
         # Hidden nonce for idempotency
@@ -498,6 +512,13 @@ def promote_form(
             value=traits_value,
             placeholder="Color markings, size, personality...",
         ),
+        # Optional notes
+        LabelTextArea(
+            "Notes",
+            id="notes",
+            name="notes",
+            placeholder="Optional notes",
+        ),
         # Hidden fields
         Hidden(name="animal_id", value=animal.animal_id),
         Hidden(name="nonce", value=str(ULID())),
@@ -589,6 +610,13 @@ def tag_add_form(
             name="tag",
             placeholder="Enter tag name",
         ),
+        # Optional notes
+        LabelTextArea(
+            "Notes",
+            id="notes",
+            name="notes",
+            placeholder="Optional notes",
+        ),
         # Event datetime picker (for backdating)
         event_datetime_field("tag_add_datetime"),
         # Hidden fields for selection context
@@ -778,6 +806,13 @@ def tag_end_form(
             P("No active tags on selected animals", cls="text-sm text-stone-400"),
             cls="p-3 bg-slate-800 rounded-md",
         ),
+        # Optional notes
+        LabelTextArea(
+            "Notes",
+            id="notes",
+            name="notes",
+            placeholder="Optional notes",
+        ),
         # Event datetime picker (for backdating)
         event_datetime_field("tag_end_datetime"),
         # Hidden fields for selection context
@@ -991,6 +1026,13 @@ def attrs_form(
             id="repro_status",
             name="repro_status",
         ),
+        # Optional notes
+        LabelTextArea(
+            "Notes",
+            id="notes",
+            name="notes",
+            placeholder="Optional notes",
+        ),
         # Event datetime picker (for backdating)
         event_datetime_field("attrs_datetime"),
         # Hidden fields for selection context

src/animaltrack/web/templates/move.py

@@ -5,7 +5,7 @@ from collections.abc import Callable
 from typing import Any
 
 from fasthtml.common import H2, Div, Form, Hidden, Option, P, Span
-from monsterui.all import Alert, AlertT, Button, ButtonT, LabelInput, LabelSelect
+from monsterui.all import Alert, AlertT, Button, ButtonT, LabelInput, LabelSelect, LabelTextArea
 from ulid import ULID
 
 from animaltrack.models.reference import Location
@@ -103,6 +103,13 @@ def move_form(
             id="to_location_id",
             name="to_location_id",
         ),
+        # Optional notes
+        LabelTextArea(
+            "Notes",
+            id="notes",
+            name="notes",
+            placeholder="Optional notes",
+        ),
         # Event datetime picker (for backdating)
         event_datetime_field("move_datetime"),
         # Hidden fields for selection context