Drop the public tag picker and the dead metadata-tags field

Portal membership is submissions.portal_id, not a tag: the backend
force-seeds the portal's own slug into every submission's tags, and the
documents/list gallery matches portal_id regardless of what a submitter
types. The submission form's free-form tag selector therefore only let
the public invent junk tags — removed, along with its TagSelector
components. Editor-set mandatoryTags from the form block still ride
along invisibly (curated cross-portal comment galleries keep working).

The SaveShareModal's permanently disabled "Tags (coming soon)" metadata
field goes too: nothing in the stack ever writes map-metadata tags, and
metadata tags are deliberately not a gallery mechanism.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: nofurtherinformation

app/src/app/components/Forms/CommentFormTagSelector.tsx

@@ -4,10 +4,9 @@ import {useFormState} from '@/app/store/formState';
 import {Blockquote, Box, Button, Dialog, Flex, Spinner, TextArea} from '@radix-ui/themes';
 import {AcknowledgementField} from './AcknowledgementField';
 import {FormField} from './FormField';
-import {CommentFormTagSelector} from './CommentFormTagSelector';
 import {MapSelector} from './MapSelector';
 import {useTurnstile} from '@/app/hooks/useTurnstile';
-import {useLayoutEffect, useRef} from 'react';
+import {useEffect, useLayoutEffect, useRef} from 'react';
 import {FIELD_ORDER, FIELD_REGISTRY} from './fieldRegistry';
 
 export interface CustomFieldSpec {
@@ -75,6 +74,14 @@ export const SubmissionForm: React.FC<SubmissionFormProps> = ({
     setFormRef(formRef);
   }, [formRef]);
 
+  // Editor-set block tags still ride along on the submission (for curated
+  // cross-portal galleries), just without a public tag-picker UI — portal
+  // membership itself is the submission's portal_id, not a tag.
+  const setTags = useFormState(state => state.setTags);
+  useEffect(() => {
+    mandatoryTags.forEach(tag => setTags(tag, 'add'));
+  }, [mandatoryTags, setTags]);
+
   if (!portalId || !fields) {
     // No form config for this portal (or a form block on a non-portal page).
     return null;
@@ -196,16 +203,7 @@ export const SubmissionForm: React.FC<SubmissionFormProps> = ({
         <Flex direction="column" gap="4">
           <ContentHeader title="Add Your Comment" />
           {submissionFields.map(renderField)}
-          <Flex
-            direction={{
-              initial: 'column',
-              md: 'row',
-            }}
-            gap="4"
-          >
-            <CommentFormTagSelector mandatoryTags={mandatoryTags} />
-            <MapSelector allowListModules={allowListModules} />
-          </Flex>
+          <MapSelector allowListModules={allowListModules} />
           {aboutFields.length > 0 && <ContentHeader title="Tell us about yourself" />}
           <Flex direction="column" gap="4" width="100%">
             {aboutFields.map(renderField)}

app/src/app/components/Forms/SubmissionForm.tsx

@@ -1,5 +1,5 @@
 import {DocumentMetadata} from '@/app/utils/api/apiHandlers/types';
-import {Box, Button, Flex, Grid, Heading, Text, TextArea, TextField} from '@radix-ui/themes';
+import {Box, Button, Flex, Heading, Text, TextArea, TextField} from '@radix-ui/themes';
 import {MapStatusButtons} from '../../Topbar/MapStatus';
 import * as Accordion from '@radix-ui/react-accordion';
 import {useState} from 'react';
@@ -53,27 +53,16 @@ export const MapDetailsSection: React.FC<{
               </Button>
             </Accordion.AccordionTrigger>
             <Accordion.AccordionContent className="AccordionContent">
-              <Grid columns="2" gap="2">
-                <Box>
-                  <Text>Group</Text>
-                  <TextField.Root
-                    className="flex-1 w-full"
-                    value={mapMetadata.group ?? ''}
-                    placeholder="Group"
-                    disabled={!isEditing}
-                    onChange={e => onChange({group: e.target.value})}
-                  />
-                </Box>
-                <Box>
-                  <Text>Tags (coming soon)</Text>
-                  <TextField.Root
-                    className="flex-1 w-full"
-                    value={mapMetadata.tags?.join(', ') ?? ''}
-                    placeholder="Tags"
-                    disabled={true}
-                  />
-                </Box>
-              </Grid>
+              <Box>
+                <Text>Group</Text>
+                <TextField.Root
+                  className="flex-1 w-full"
+                  value={mapMetadata.group ?? ''}
+                  placeholder="Group"
+                  disabled={!isEditing}
+                  onChange={e => onChange({group: e.target.value})}
+                />
+              </Box>
               <Box>
                 <Text>Comments</Text>
                 <TextArea