Fix share copy-link, destination-picker filters, and type-filter UX

- SharesController's fetchShares() built NextcloudShare objects through
  its own thin inline parser instead of _shareFromJson, so url/token/
  permissions/expireDate were always null - a public link share could
  never show "Copy link" in the Shares tab. Reuses _shareFromJson.
- Upload/Move/Copy's destination picker hid External storage in its
  filter sheet (showStorageScope: false) unlike Files' own controls
  row, despite the design doc already calling for full parity.
- Files' and Photos' type filter (All/Files/Folders, All/Photos/Videos)
  now render as one consistent style in both filter sheets: every icon
  always shown, label only on the selected segment
  (NooSegmentedControl's new labelOnlySelected), replacing Files' old
  checkmark list and Photos' own always-labelled track.
- Fixes Photos' type filter only visually updating after closing and
  reopening the filter sheet - it lived on PhotosView's own State, so
  Listenable.merge([photos, files]) never rebuilt the sheet when it
  changed; a StatefulBuilder now gives it that trigger.
- Replaces Settings' trailing section jump rail with per-section
  collapsible cards (NooGroupedList's new collapsible param, expanded
  by default) - one less parallel way to navigate a long screen.

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

lib/services/nextcloud_service.dart

@@ -1471,28 +1471,17 @@ class NextcloudService {
     final rawList = data['ocs']?['data'];
     if (rawList is! List) return [];
 
-    return rawList.map<NextcloudShare>((raw) {
-      final path = (raw['path'] ?? '/').toString();
-      final segments = path.split('/').where((s) => s.isNotEmpty).toList();
-      final name = segments.isNotEmpty ? segments.last : path;
-      final isFolder = (raw['item_type'] ?? '').toString() == 'folder';
-      final mimeType = raw['mimetype'] as String?;
-
-      return NextcloudShare(
-        id: (raw['id'] ?? '').toString(),
-        path: path,
-        name: name,
-        itemType: NextcloudItem.deduceType(name, isFolder, mimeType),
-        shareType: _mapShareType((raw['share_type'] as num?)?.toInt() ?? -1),
-        ownerDisplayName: (raw['displayname_owner'] ?? raw['uid_owner'] ?? '')
-            .toString(),
-        sharedWithDisplayName: raw['share_with_displayname'] as String?,
-        sharedAt: DateTime.fromMillisecondsSinceEpoch(
-          ((raw['stime'] as num?)?.toInt() ?? 0) * 1000,
-        ),
-        sharedWithMe: sharedWithMe,
-      );
-    }).toList();
+    // Shares out to `_shareFromJson` (the same parser `fetchSharesForPath`/
+    // `fetchInheritedShares` use) rather than its own duplicated, thinner
+    // inline parsing - that copy never set `url`/`token`/`permissions`/
+    // `expireDate` at all, so a public-link share always came back with
+    // `url: null` here and the Shares tab's own "Copy link" action could
+    // never show up for it.
+    return rawList
+        .map<NextcloudShare>(
+          (raw) => _shareFromJson(raw, sharedWithMe: sharedWithMe),
+        )
+        .toList();
   }
 
   /// Creates a public link share for [path] and returns its share URL.