fix: transform tools — move/copy press-drag-release, correct coordinate calculation

frontend/src/interaction/index.ts

@@ -368,6 +368,18 @@ export class InteractionEngine {
       return;
     }
 
+    // Move/Copy: confirm on mouseUp (drag-release)
+    if (this.state.phase === 'modifying' && this.state.points.length >= 1) {
+      const tool = this.state.activeTool;
+      if (tool === 'move' || tool === 'copy') {
+        const raw = this.getWorldCoords(e);
+        const snapped = this.applySnap(raw.x, raw.y);
+        const final = this.applyOrtho(snapped.x, snapped.y);
+        this.confirmModify(final);
+        return;
+      }
+    }
+
     if (this.state.activeTool === 'select' && this.selectionEngine.isBoxSelecting()) {
       if (this.selectionEngine.hasBoxMoved()) {
         this.selectionEngine.finishBoxSelect(this.allElements);
@@ -765,8 +777,26 @@ export class InteractionEngine {
       return;
     }
 
-    // Move/Copy/Rotate/Scale/Mirror: require existing selection
+    // Move/Copy: press-drag-release (kein click-click)
-    // Second click confirms the modification
+    if (tool === 'move' || tool === 'copy') {
+      if (this.state.phase === 'modifying' && this.state.points.length >= 1) {
+        // Zweiter Klick bei move/copy — sollte nicht passieren, aber falls doch: bestätigen
+        this.confirmModify(pt);
+        return;
+      }
+      const selected = this.selectionEngine.getSelectedElements(this.allElements);
+      if (selected.length === 0) {
+        this.onCommandTrigger?.('select-first');
+        return;
+      }
+      this.modifySelected = selected;
+      this.state.phase = 'modifying';
+      this.state.points.push(pt); // Start-Punkt für drag
+      this.notifyToolStateChanged();
+      return;
+    }
+
+    // Rotate/Scale/Mirror: click-click (Pivot + Target)
     if (this.state.phase === 'modifying' && this.state.points.length >= 1) {
       this.confirmModify(pt);
       return;