feat(library): tags + tag filtering, monochrome icons; fix live tag updates

- library: expose page tags (batch), render tag chips per row and add a tag
  filter bar; register tag create/associate/remove in the shared context menu
  exactly like local-workspace
- library: restore monochrome SVG icons (folder/edit/image/file) matching
  local-workspace, with optional custom page_icon
- workspace: refresh tag chips/filter live on tag add/remove (reassign arrays
  + tagsVersion) instead of requiring a page reload
- ctxmenu: measure the rendered menu and clamp it to the viewport on open

app/templates/_ctx_menu.html

@@ -54,9 +54,27 @@
         this.tagExistingOpen = false;
         this.iconOpen = false;
         this.newTagColor = (node && node.tags && node.tags[0] && node.tags[0].color) || '#787774';
-        this.x = Math.max(4, Math.min((ev && ev.clientX) || 0, window.innerWidth - 240));
-        this.y = Math.max(4, Math.min((ev && ev.clientY) || 0, window.innerHeight - 48));
+        var cx = (ev && ev.clientX) || 0;
+        var cy = (ev && ev.clientY) || 0;
+        this.x = Math.max(8, Math.min(cx, window.innerWidth - 240));
+        this.y = Math.max(8, Math.min(cy, window.innerHeight - 48));
         this.open = true;
+        var self = this;
+        /* Mesure la taille réelle du menu (une fois rendu) puis le replace
+           pour qu'il reste TOUJOURS entièrement visible dans le viewport. */
+        var place = function () {
+          var el = document.querySelector('.fd-ctx-menu');
+          var w = el ? el.offsetWidth : 240;
+          var h = el ? el.offsetHeight : 320;
+          var vw = window.innerWidth, vh = window.innerHeight;
+          var nx = cx, ny = cy;
+          if (nx + w > vw - 8) nx = vw - w - 8;
+          if (ny + h > vh - 8) ny = vh - h - 8;
+          self.x = Math.max(8, nx);
+          self.y = Math.max(8, ny);
+        };
+        if (window.Alpine && window.Alpine.nextTick) window.Alpine.nextTick(place);
+        else setTimeout(place, 0);
       },
       close() {
         this.open = false;