Add dashboard tag cloud and spectrum tag color picker

- Dashboard's Characters column gains a tag cloud below it, sized by
  usage count, linking into the tags page.
- Tags page color editor replaced with 16 preset swatches across the
  spectrum plus a "Custom..." link to the native hex picker.
- Fix: tag color/name updates weren't invalidating the tag-references
  query, so the reference panel showed a stale color after editing.
- Tag cloud/tag list selection now round-trips through a ?tag= query
  param so clicking a cloud tag selects it on the tags page.

src/Novelly.Web/src/api/hooks.ts

@@ -331,7 +331,10 @@ export function useUpdateTag(projectId: string) {
   return useMutation({
     mutationFn: ({ id, ...body }: { id: string; name?: string; color?: string }) =>
       api.patch<TagSummary>(`/api/tags/${id}`, body),
-    onSuccess: () => qc.invalidateQueries({ queryKey: keys.tags(projectId) }),
+    onSuccess: (_, { id }) => {
+      qc.invalidateQueries({ queryKey: keys.tags(projectId) })
+      qc.invalidateQueries({ queryKey: keys.tagRefs(id) })
+    },
   })
 }
 

src/Novelly.Web/src/components/TagColorPicker.tsx

@@ -0,0 +1,86 @@
+import { useRef } from 'react'
+
+export const TAG_COLOR_SWATCHES = [
+  '#d74242',
+  '#d77a42',
+  '#d7b242',
+  '#c4d742',
+  '#8cd742',
+  '#54d742',
+  '#42d767',
+  '#42d79f',
+  '#42d7d7',
+  '#429fd7',
+  '#4267d7',
+  '#5442d7',
+  '#8c42d7',
+  '#c442d7',
+  '#d742b2',
+  '#d7427a',
+]
+
+export function TagColorPicker({
+  value,
+  onChange,
+  readOnly,
+}: {
+  value: string
+  onChange: (color: string) => void
+  readOnly?: boolean
+}) {
+  const customInputRef = useRef<HTMLInputElement>(null)
+  const isCustom = !TAG_COLOR_SWATCHES.some((swatch) => swatch.toLowerCase() === value.toLowerCase())
+
+  return (
+    <div id="tag-color-picker" className="grid gap-1.5">
+      <span className="label">Colour</span>
+      <div className="flex flex-wrap items-center gap-1.5">
+        {TAG_COLOR_SWATCHES.map((swatch) => (
+          <button
+            key={swatch}
+            type="button"
+            id={`tag-color-swatch-${swatch.slice(1)}`}
+            aria-label={`Use colour ${swatch}`}
+            aria-pressed={value.toLowerCase() === swatch.toLowerCase()}
+            disabled={readOnly}
+            onClick={() => onChange(swatch)}
+            className="h-6 w-6 rounded-full transition disabled:cursor-not-allowed"
+            style={{
+              background: swatch,
+              outline: value.toLowerCase() === swatch.toLowerCase() ? '2px solid var(--ink)' : '2px solid transparent',
+              outlineOffset: '2px',
+            }}
+          />
+        ))}
+
+        <button
+          type="button"
+          id="tag-color-custom-button"
+          disabled={readOnly}
+          onClick={() => customInputRef.current?.click()}
+          className="flex h-6 items-center gap-1.5 rounded-full px-2 text-xs font-medium transition hover:underline disabled:cursor-not-allowed"
+          style={{ color: 'var(--ink-muted)' }}
+        >
+          <span
+            className="h-4 w-4 shrink-0 rounded-full"
+            style={{
+              background: isCustom ? value : 'conic-gradient(from 0deg, red, yellow, lime, cyan, blue, magenta, red)',
+              outline: isCustom ? '2px solid var(--ink)' : '2px solid transparent',
+              outlineOffset: '2px',
+            }}
+          />
+          Custom…
+        </button>
+        <input
+          ref={customInputRef}
+          id="tag-color-custom-input"
+          className="sr-only"
+          type="color"
+          value={isCustom ? value : '#9a4a2f'}
+          disabled={readOnly}
+          onChange={(e) => onChange(e.target.value)}
+        />
+      </div>
+    </div>
+  )
+}

src/Novelly.Web/src/pages/DashboardPage.tsx

@@ -1,6 +1,6 @@
 import { Link, useParams } from 'react-router-dom'
-import { useChapters, useCharacters, useProject, useUpdateProject } from '../api/hooks'
+import { useChapters, useCharacters, useProject, useTags, useUpdateProject } from '../api/hooks'
-import type { Project } from '../api/types'
+import type { Project, TagSummary } from '../api/types'
 import { useAuth } from '../auth/AuthContext'
 import { AutoField, EmptyState, ErrorNote, Spinner, StatusBadge } from '../components/ui'
 
@@ -47,6 +47,7 @@ function BrainstormingDashboard({ project }: { project: Project }) {
 function OutliningDashboard({ projectId }: { projectId: string }) {
   const { data: characters, isPending: charactersPending, error: charactersError } = useCharacters(projectId)
   const { data: chapters, isPending: chaptersPending, error: chaptersError } = useChapters(projectId)
+  const { data: tags, isPending: tagsPending, error: tagsError } = useTags(projectId)
 
   const recentCharacters = [...(characters ?? [])].sort(
     (a, b) => new Date(b.updatedAt).getTime() - new Date(a.updatedAt).getTime(),
@@ -96,43 +97,93 @@ function OutliningDashboard({ projectId }: { projectId: string }) {
           )}
         </section>
 
-        <section className="card p-5">
+        <div className="grid content-start gap-6">
-          <div className="mb-4 flex items-center justify-between gap-4">
+          <section className="card p-5">
-            <h2 className="text-lg font-semibold">Characters</h2>
+            <div className="mb-4 flex items-center justify-between gap-4">
-            <Link to="characters" className="text-sm muted hover:underline">
+              <h2 className="text-lg font-semibold">Characters</h2>
-              View all →
+              <Link to="characters" className="text-sm muted hover:underline">
-            </Link>
+                View all →
-          </div>
+              </Link>
+            </div>
 
-          {charactersError && <ErrorNote error={charactersError} />}
+            {charactersError && <ErrorNote error={charactersError} />}
-          {charactersPending ? (
+            {charactersPending ? (
-            <Spinner label="Loading characters" />
+              <Spinner label="Loading characters" />
-          ) : recentCharacters.length === 0 ? (
+            ) : recentCharacters.length === 0 ? (
-            <EmptyState title="No characters yet" hint="Add the protagonist first." />
+              <EmptyState title="No characters yet" hint="Add the protagonist first." />
-          ) : (
+            ) : (
-            <ul className="grid grid-cols-1 gap-2">
+              <ul className="grid grid-cols-1 gap-2">
-              {recentCharacters.slice(0, RECENT_COUNT).map((character) => (
+                {recentCharacters.slice(0, RECENT_COUNT).map((character) => (
-                <li key={character.id}>
+                  <li key={character.id}>
-                  <Link
+                    <Link
-                    to="characters"
+                      to={`characters/${character.id}`}
-                    className="card flex items-center justify-between gap-3 px-4 py-2.5 transition hover:shadow-sm"
+                      className="card flex items-center justify-between gap-3 px-4 py-2.5 transition hover:shadow-sm"
-                  >
+                    >
-                    <div className="min-w-0">
+                      <div className="min-w-0">
-                      <div className="truncate font-medium">{character.name}</div>
+                        <div className="truncate font-medium">{character.name}</div>
-                      <div className="text-xs muted">
+                        <div className="text-xs muted">
-                        {character.role} · {character.importance}
+                          {character.role} · {character.importance}
+                        </div>
                       </div>
-                    </div>
+                      <span className="shrink-0 text-xs muted">
-                    <span className="shrink-0 text-xs muted">
+                        {new Date(character.updatedAt).toLocaleDateString()}
-                      {new Date(character.updatedAt).toLocaleDateString()}
+                      </span>
-                    </span>
+                    </Link>
-                  </Link>
+                  </li>
-                </li>
+                ))}
-              ))}
+              </ul>
-            </ul>
+            )}
-          )}
+          </section>
-        </section>
+
+          <section id="dashboard-tag-cloud" className="card p-5">
+            <div className="mb-4 flex items-center justify-between gap-4">
+              <h2 className="text-lg font-semibold">Tags</h2>
+              <Link to="tags" className="text-sm muted hover:underline">
+                View all →
+              </Link>
+            </div>
+
+            {tagsError && <ErrorNote error={tagsError} />}
+            {tagsPending ? (
+              <Spinner label="Loading tags" />
+            ) : !tags || tags.length === 0 ? (
+              <EmptyState title="No tags yet" hint="Tag a character, chapter or beat and it shows up here." />
+            ) : (
+              <TagCloud projectId={projectId} tags={tags} />
+            )}
+          </section>
+        </div>
       </div>
     </div>
   )
 }
+
+function TagCloud({ projectId, tags }: { projectId: string; tags: TagSummary[] }) {
+  const maxCount = Math.max(...tags.map((t) => t.totalCount), 1)
+
+  const sizeFor = (count: number) => {
+    const scale = Math.sqrt(count / maxCount)
+    return 0.75 + scale * 0.85
+  }
+
+  return (
+    <div id="tag-cloud" className="flex flex-wrap items-baseline gap-x-3 gap-y-2">
+      {[...tags]
+        .sort((a, b) => a.name.localeCompare(b.name))
+        .map((tag) => (
+          <Link
+            key={tag.id}
+            to={`/projects/${projectId}/tags?tag=${tag.id}`}
+            className="leading-none font-medium transition hover:underline"
+            style={{
+              fontSize: `${sizeFor(tag.totalCount)}rem`,
+              color: tag.color ?? 'var(--accent)',
+            }}
+            title={`${tag.name} · ${tag.totalCount}`}
+          >
+            {tag.name}
+          </Link>
+        ))}
+    </div>
+  )
+}

src/Novelly.Web/src/pages/TagsPage.tsx

@@ -1,10 +1,11 @@
 import { useState } from 'react'
-import { Link, useParams } from 'react-router-dom'
+import { Link, useParams, useSearchParams } from 'react-router-dom'
 import { useDeleteTag, useProject, useTagReferences, useTags, useUpdateTag } from '../api/hooks'
 import { useAuth } from '../auth/AuthContext'
 import { EmptyState, ErrorNote, Spinner } from '../components/ui'
 import { ConfirmModal } from '../components/ConfirmModal'
 import { TagChip } from '../components/TagEditor'
+import { TagColorPicker } from '../components/TagColorPicker'
 
 export default function TagsPage() {
   const { projectId = '' } = useParams()
@@ -13,13 +14,20 @@ export default function TagsPage() {
   const { can } = useAuth()
   const canWrite = can('Write', project)
   const canDelete = can('DeleteContent', project)
-  const [selectedId, setSelectedId] = useState<string | undefined>()
+  const [searchParams, setSearchParams] = useSearchParams()
+  const selectedId = searchParams.get('tag') ?? undefined
 
   if (isPending) return <Spinner label="Loading tags" />
   if (error) return <ErrorNote error={error} />
 
   const selected = tags?.find((t) => t.id === selectedId) ?? tags?.[0]
 
+  const select = (id: string) =>
+    setSearchParams((params) => {
+      params.set('tag', id)
+      return params
+    })
+
   return (
     <div className="grid gap-6 lg:grid-cols-[18rem_1fr]">
       <aside className="grid content-start gap-2">
@@ -39,7 +47,7 @@ export default function TagsPage() {
         {tags?.map((tag) => (
           <button
             key={tag.id}
-            onClick={() => setSelectedId(tag.id)}
+            onClick={() => select(tag.id)}
             className="card flex items-center justify-between gap-2 px-3 py-2 text-left transition hover:shadow-sm"
             style={
               tag.id === selected?.id
@@ -111,16 +119,11 @@ function TagReferencePanel({
             }}
           />
         </label>
-        <label className="block">
+        <TagColorPicker
-          <span className="label">Colour</span>
+          value={data.tag.color ?? '#9a4a2f'}
-          <input
+          readOnly={!canWrite}
-            className="input h-9 w-20 p-1"
+          onChange={(color) => update.mutate({ id: tagId, color })}
-            type="color"
+        />
-            defaultValue={data.tag.color ?? '#9a4a2f'}
-            readOnly={!canWrite}
-            onBlur={(e) => canWrite && update.mutate({ id: tagId, color: e.target.value })}
-          />
-        </label>
         {canDelete && (
           <button className="btn btn-danger" onClick={() => setConfirmingDelete(true)}>
             Delete tag