feat(integration) : extract Gitea/BookStack/Zimbra/Share front into module layer

LST-68 (2.6) front. Completes the Integration module and Phase 2.

- New frontend/modules/integration/ layer (auto-detected): services
  (gitea, bookstack, zimbra, share, share-settings) + their DTOs, and the
  useShareStatus composable.
- Consumers repointed to ~/modules/integration/...: admin tabs
  (Gitea/BookStack/Zimbra/Share), PM task sections (TaskGitSection,
  TaskBookStackLinks, TaskDocumentShareLinker), ProjectDrawer, TaskModal,
  pages/documents.vue, components/share/SharedFilePreview.vue.
- Admin tabs, SharedFilePreview and documents/admin pages stay at their
  location (only imports updated). i18n stays global.

nuxt build passes; all routes preserved.

frontend/modules/integration/services/dto/bookstack.ts

@@ -0,0 +1,42 @@
+export type BookStackSettings = {
+    url: string | null
+    hasToken: boolean
+}
+
+export type BookStackSettingsWrite = {
+    url: string | null
+    tokenId: string | null
+    tokenSecret: string | null
+}
+
+export type BookStackTestResult = {
+    success: boolean
+}
+
+export type BookStackShelf = {
+    id: number
+    name: string
+}
+
+export type BookStackLink = {
+    id: number
+    bookstackId: number
+    bookstackType: 'page' | 'book'
+    title: string
+    url: string
+    createdAt: string
+}
+
+export type BookStackLinkCreate = {
+    bookstackId: number
+    bookstackType: 'page' | 'book'
+    title: string
+    url: string
+}
+
+export type BookStackSearchResult = {
+    id: number
+    type: 'page' | 'book'
+    name: string
+    url: string
+}

frontend/modules/integration/services/dto/gitea.ts

@@ -0,0 +1,57 @@
+export type GiteaSettings = {
+    url: string | null
+    hasToken: boolean
+}
+
+export type GiteaSettingsWrite = {
+    url: string | null
+    token: string | null
+}
+
+export type GiteaRepository = {
+    fullName: string
+    name: string
+    owner: string
+}
+
+export type GiteaBranch = {
+    name: string
+    commits: GiteaCommit[]
+}
+
+export type GiteaCommit = {
+    sha: string
+    message: string
+    author: string
+    date: string
+}
+
+export type GiteaBranchCreate = {
+    type: string
+    baseBranch: string
+}
+
+export type GiteaPullRequest = {
+    number: number
+    title: string
+    state: string
+    merged: boolean
+    headBranch: string
+    author: string
+    url: string
+    ciStatuses: GiteaCiStatus[]
+}
+
+export type GiteaCiStatus = {
+    context: string
+    status: string
+    target_url: string
+}
+
+export type GiteaBranchName = {
+    name: string
+}
+
+export type GiteaTestResult = {
+    success: boolean
+}

frontend/modules/integration/services/dto/share.ts

@@ -0,0 +1,53 @@
+export type FileEntry = {
+    name: string
+    path: string
+    isDir: boolean
+    size: number
+    modifiedAt: number | null
+    mimeType: string
+}
+
+export type Breadcrumb = {
+    name: string
+    path: string
+}
+
+export type ShareBrowseResult = {
+    path: string
+    breadcrumb: Breadcrumb[]
+    entries: FileEntry[]
+}
+
+export type ShareSearchResult = {
+    query: string
+    entries: FileEntry[]
+}
+
+export type ShareStatus = {
+    enabled: boolean
+}
+
+export type ShareSettings = {
+    host: string | null
+    shareName: string | null
+    basePath: string | null
+    domain: string | null
+    username: string | null
+    enabled: boolean
+    hasPassword: boolean
+}
+
+export type ShareSettingsWrite = {
+    host: string | null
+    shareName: string | null
+    basePath: string | null
+    domain: string | null
+    username: string | null
+    password?: string | null
+    enabled: boolean
+}
+
+export type ShareTestResult = {
+    success: boolean
+    message: string | null
+}

frontend/modules/integration/services/dto/zimbra.ts

@@ -0,0 +1,19 @@
+export type ZimbraSettings = {
+    serverUrl: string | null
+    username: string | null
+    calendarPath: string | null
+    enabled: boolean
+    hasPassword: boolean
+}
+
+export type ZimbraSettingsWrite = {
+    serverUrl: string | null
+    username: string | null
+    calendarPath: string | null
+    password?: string | null
+    enabled: boolean
+}
+
+export type ZimbraTestResult = {
+    success: boolean
+}