feat(ui): rinomina Misure→Attività, textarea descrizione task, tool Testo annotazioni

- Navbar e breadcrumb: label "Misure" rinominata "Attività" (IT) / "Activities" (EN)
- Descrizione task: input sostituito con textarea multilinea + display whitespace-pre-wrap
- Annotation editor: nuovo tool "Testo" con fabric.IText (inline editing, serializzazione, viewer)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/frontend/flask_app/static/js/annotation-editor.js

@@ -671,6 +671,53 @@ function annotationEditor() {
       return rect;
     },
 
+    // ----------------------------------------------------------------
+    // Object creation - Text
+    // ----------------------------------------------------------------
+
+    addText(x, y, textContent, fontSize) {
+      var size = fontSize || 18;
+      var itext = new fabric.IText(textContent || 'Testo', {
+        left: x,
+        top: y,
+        fontSize: size,
+        fill: this.currentColor,
+        fontFamily: 'Inter, sans-serif',
+        fontWeight: 'bold',
+        selectable: true,
+        evented: true,
+        hasControls: false,
+        hasBorders: true,
+        lockRotation: true,
+        lockScalingX: true,
+        lockScalingY: true,
+        objectType: 'text',
+        textColor: this.currentColor,
+        textFontSize: size,
+      });
+
+      var self = this;
+      itext.on('editing:exited', function () {
+        if (!itext.text || itext.text.trim() === '') {
+          self.canvas.remove(itext);
+        }
+        itext.textColor = itext.fill;
+        self.isDirty = true;
+        window.dispatchEvent(new CustomEvent('annotations-changed', { detail: { json: self.getAnnotationsJson() } }));
+      });
+
+      itext.on('changed', function () {
+        self.isDirty = true;
+      });
+
+      this.canvas.add(itext);
+      itext.setCoords();
+      this.canvas.setActiveObject(itext);
+      this.isDirty = true;
+      window.dispatchEvent(new CustomEvent('annotations-changed', { detail: { json: this.getAnnotationsJson() } }));
+      return itext;
+    },
+
     // ----------------------------------------------------------------
     // Toolbar / mode switching
     // ----------------------------------------------------------------
@@ -678,7 +725,7 @@ function annotationEditor() {
     /**
      * Set the current interaction mode.
      *
-     * @param {'select'|'marker'|'arrow'|'rect'} mode
+     * @param {'select'|'marker'|'arrow'|'rect'|'text'} mode
      */
     setMode(mode) {
       this.activeMode = mode;
@@ -731,6 +778,13 @@ function annotationEditor() {
           self.addMarker(pointer.x, pointer.y);
           self.setMode('select');
           window.dispatchEvent(new CustomEvent('anno-mode-changed', { detail: { mode: 'select' } }));
+        } else if (self.activeMode === 'text') {
+          var textObj = self.addText(pointer.x, pointer.y);
+          self.setMode('select');
+          window.dispatchEvent(new CustomEvent('anno-mode-changed', { detail: { mode: 'select' } }));
+          self.canvas.setActiveObject(textObj);
+          textObj.enterEditing();
+          textObj.selectAll();
         } else if (self.activeMode === 'arrow') {
           isDrawing = true;
           drawStartX = pointer.x;
@@ -1023,6 +1077,13 @@ function annotationEditor() {
         if (obj.arrowLineDash) data.lineDash = obj.arrowLineDash;
         if (obj.areaLineDash) data.lineDash = obj.areaLineDash;
 
+        // Text-specific
+        if (obj.objectType === 'text') {
+          data.textContent = obj.text;
+          data.textColor = obj.textColor || obj.fill;
+          data.fontSize = obj.textFontSize || obj.fontSize;
+        }
+
         // Arrow-specific: store original endpoints
         if (obj.objectType === 'arrow') {
           data.x1 = obj.arrowX1 != null ? Math.round(obj.arrowX1 * 100) / 100 : null;
@@ -1120,6 +1181,11 @@ function annotationEditor() {
             this.currentColor = savedColor3;
             this.currentStrokeWidth = savedWidth2;
             this.currentLineDash = savedDash2;
+          } else if (obj.type === 'text') {
+            var savedColor4 = this.currentColor;
+            if (obj.textColor) this.currentColor = obj.textColor;
+            this.addText(obj.left * cs, obj.top * cs, obj.textContent, (obj.fontSize || 18) * cs);
+            this.currentColor = savedColor4;
           }
         }
 

src/frontend/flask_app/static/js/annotation-viewer.js

@@ -436,6 +436,8 @@ function _drawEditorAnnotations(ctx, data, scale) {
       _drawPreviewArrow(ctx, obj, annoScale);
     } else if (obj.type === 'area') {
       _drawPreviewArea(ctx, obj, annoScale);
+    } else if (obj.type === 'text') {
+      _drawPreviewText(ctx, obj, annoScale);
     }
   }
 }
@@ -514,6 +516,24 @@ function _drawPreviewArea(ctx, obj, scale) {
   ctx.setLineDash([]);
 }
 
+function _drawPreviewText(ctx, obj, scale) {
+  var x = obj.left * scale;
+  var y = obj.top * scale;
+  var color = obj.textColor || '#000000';
+  var fontSize = Math.max(10, Math.round((obj.fontSize || 18) * scale));
+
+  ctx.fillStyle = color;
+  ctx.font = 'bold ' + fontSize + 'px Inter, sans-serif';
+  ctx.textAlign = 'left';
+  ctx.textBaseline = 'top';
+
+  var lines = (obj.textContent || '').split('\n');
+  var lineHeight = fontSize * 1.2;
+  for (var j = 0; j < lines.length; j++) {
+    ctx.fillText(lines[j], x, y + j * lineHeight);
+  }
+}
+
 /**
  * Draw annotations in the legacy format (markers: point/rectangle).
  */