fix(library): SQL workspace — (workspace != '' OR workspace_id IS NOT NULL)

Les pages du workspace local ont workspace='' mais workspace_id=27.
Le filtre workspace != '' les excluait, retournant 0 items.
Ajout de OR workspace_id IS NOT NULL pour inclure les pages locales.
Simplification du frontend: le workspace tab appelle l'API standard avec workspace_id.

app/templates/library.html

@@ -464,14 +464,8 @@ function libraryPage() {
       try {
         var url = '/api/library/' + this.tab;
         var sep = '?';
-        // Workspace tab: if local workspace is active, show local workspace items
-        if (this.tab === 'workspace' && this.workspaceId && !this.isGiteaActive) {
-          url = '/api/library/local-workspace' + sep + 'workspace_id=' + this.workspaceId;
-          sep = '&';
-        } else {
-          if (this.workspaceId && (this.tab === 'recents')) {
-            url += sep + 'workspace_id=' + this.workspaceId; sep = '&';
-          }
+        if (this.workspaceId && (this.tab === 'recents' || this.tab === 'workspace')) {
+          url += sep + 'workspace_id=' + this.workspaceId; sep = '&';
         }
         if (this.tab === 'repository' && this.isGiteaActive) {
           url += sep + 'gitea_owner=' + encodeURIComponent(this.giteaOwner) + '&gitea_repo=' + encodeURIComponent(this.giteaRepo);
@@ -528,12 +522,7 @@ function libraryPage() {
       this.expanded = Object.assign({}, this.expanded);
       if (!item.children || !item.children.length) {
         try {
-          // Route to correct children endpoint based on source type
-          var childrenUrl = '/api/library/children/' + item.id;
-          if (item.source_type === 'local-ws') {
-            childrenUrl = '/api/library/local-workspace-children/' + item.id;
-          }
-          var r = await fetch(childrenUrl);
+          var r = await fetch('/api/library/children/' + item.id);
           var d = await r.json();
           item.children = d.items || [];
           // Mark the tree for depth calculation