fix(acl): dölj redigeringsknappen för användare utan edit-rättighet

VisualEditors 'Börja redigera'-banner styrdes bara av internt state och
visades för alla, även publika läs-användare. Ny editable-prop gate:ar
bannern och tvingar läsläge när rättigheten saknas. SourceEditor får en
readonly-prop (CodeMirror-Compartment) så Source-fliken inte längre är
redigerbar utan rättighet. Versionsvyn är nu alltid read-only.

Backend nekade redan save utan Edit/Create — detta var enbart ett UI-fel.

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

frontend/src/components/editor/SourceEditor.vue

@@ -1,14 +1,18 @@
 <script setup lang="ts">
 import { ref, onMounted, onBeforeUnmount, watch } from 'vue'
 import { EditorView, basicSetup } from 'codemirror'
-import { EditorState } from '@codemirror/state'
+import { EditorState, Compartment } from '@codemirror/state'
 import { markdown } from '@codemirror/lang-markdown'
 import { oneDark } from '@codemirror/theme-one-dark'
 
 const model = defineModel<string>({ required: true })
+const props = withDefaults(defineProps<{ readonly?: boolean }>(), { readonly: false })
 const container = ref<HTMLElement | null>(null)
 let view: EditorView | null = null
 
+const readonlyCompartment = new Compartment()
+const readonlyExtensions = (ro: boolean) => [EditorState.readOnly.of(ro), EditorView.editable.of(!ro)]
+
 onMounted(() => {
   if (!container.value) return
 
@@ -20,6 +24,7 @@ onMounted(() => {
         basicSetup,
         markdown(),
         oneDark,
+        readonlyCompartment.of(readonlyExtensions(props.readonly)),
         EditorView.updateListener.of((update) => {
           if (update.docChanged) {
             model.value = update.state.doc.toString()
@@ -30,6 +35,10 @@ onMounted(() => {
   })
 })
 
+watch(() => props.readonly, (ro) => {
+  view?.dispatch({ effects: readonlyCompartment.reconfigure(readonlyExtensions(ro)) })
+})
+
 // Sync external model changes into CodeMirror.
 watch(model, (adoc) => {
   if (!view) return

frontend/src/components/editor/VisualEditor.vue

@@ -14,9 +14,15 @@ import ImageEditDialog from './ImageEditDialog.vue'
 import LinkDialog from './LinkDialog.vue'
 
 const model = defineModel<string>({ required: true })
-const props = defineProps<{ slug?: string }>()
+const props = withDefaults(defineProps<{ slug?: string; editable?: boolean }>(), { editable: true })
 
 const isEditing = ref(false)
+
+// Force read mode if edit permission disappears (e.g. navigating to a doc
+// the user may not edit while this component instance is reused).
+watch(() => props.editable, (editable) => {
+  if (!editable) isEditing.value = false
+})
 const showImagePicker = ref(false)
 const showImageEditor = ref(false)
 const showLinkDialog = ref({ open: false, url: '', text: '' })
@@ -473,9 +479,9 @@ function handleEditorClick(e: MouseEvent) {
       </button>
     </div>
 
-    <!-- Banner when not editing -->
+    <!-- Banner when not editing (hidden entirely without edit permission) -->
     <div
-      v-if="!isEditing"
+      v-if="!isEditing && props.editable"
       class="bg-indigo-50 dark:bg-slate-800/80 border-b border-indigo-100 dark:border-slate-700/60 flex items-center justify-between p-2 flex-shrink-0"
     >
       <span class="text-sm text-indigo-700 dark:text-indigo-300 ml-2">Läsläge</span>

frontend/src/views/DocumentView.vue

@@ -357,11 +357,13 @@ function formatDate(dateStr: string) {
           <VisualEditor
             v-else-if="versionEditorMode === 'visual'"
             :slug="slug"
+            :editable="false"
             :model-value="versionContent"
             @update:model-value="() => {}"
           />
           <SourceEditor
             v-else
+            readonly
             :model-value="versionContent"
             @update:model-value="() => {}"
           />
@@ -370,8 +372,8 @@ function formatDate(dateStr: string) {
         <!-- Normal editor -->
         <template v-else>
           <div v-if="loading" class="p-6 text-slate-400 animate-pulse">Loading…</div>
-          <VisualEditor v-else-if="editorMode === 'visual'" v-model="content" :slug="slug" />
-          <SourceEditor v-else v-model="content" />
+          <VisualEditor v-else-if="editorMode === 'visual'" v-model="content" :slug="slug" :editable="canEditDoc" />
+          <SourceEditor v-else v-model="content" :readonly="!canEditDoc" />
         </template>
       </div>
     </div>