improvement(knowledge): use canonical ChipDatePicker in document tags modal

The document tags modal used the legacy DatePicker primitive for date-typed
tag values while the rest of the knowledge base date inputs use the canonical
ChipDatePicker. Swap both usages (edit + create) to ChipDatePicker (same
YYYY-MM-DD value contract, full-width to match sibling fields) so the chrome
matches the chip design system, and align a tag-row value label to the caption
text size used by its sibling.

Author: waleedlatif1

apps/sim/app/workspace/[workspaceId]/knowledge/[id]/[documentId]/components/document-tags-modal/document-tags-modal.tsx

@@ -6,13 +6,13 @@ import {
   Badge,
   Button,
   ChipCombobox,
+  ChipDatePicker,
   ChipInput,
   ChipModal,
   ChipModalBody,
   ChipModalField,
   ChipModalFooter,
   ChipModalHeader,
-  DatePicker,
   Label,
   Trash,
 } from '@/components/emcn'
@@ -411,7 +411,7 @@ export function DocumentTagsModal({
                     {FIELD_TYPE_LABELS[tag.fieldType] || tag.fieldType}
                   </span>
                   <div className='mb-[-1.5px] h-[14px] w-[1.25px] flex-shrink-0 rounded-full bg-[var(--border-1)]' />
-                  <span className='min-w-0 flex-1 truncate text-[var(--text-muted)] text-xs'>
+                  <span className='min-w-0 flex-1 truncate text-[var(--text-muted)] text-caption'>
                     {formatValueForDisplay(tag.value, tag.fieldType)}
                   </span>
                   <div className='flex flex-shrink-0 items-center gap-1'>
@@ -524,10 +524,11 @@ export function DocumentTagsModal({
                           }}
                         />
                       ) : editTagForm.fieldType === 'date' ? (
-                        <DatePicker
+                        <ChipDatePicker
                           value={editTagForm.value || undefined}
                           onChange={(value) => setEditTagForm({ ...editTagForm, value })}
                           placeholder='Select date'
+                          fullWidth
                         />
                       ) : (
                         <ChipInput
@@ -676,10 +677,11 @@ export function DocumentTagsModal({
                       }}
                     />
                   ) : editTagForm.fieldType === 'date' ? (
-                    <DatePicker
+                    <ChipDatePicker
                       value={editTagForm.value || undefined}
                       onChange={(value) => setEditTagForm({ ...editTagForm, value })}
                       placeholder='Select date'
+                      fullWidth
                     />
                   ) : (
                     <ChipInput