Merge branch 'main' into claude/automate-sam-download-mzpRs

frontend/src/components/ImageCanvas.css

@@ -1,15 +1,11 @@
+/* ImageCanvas fills the entire canvas wrapper */
 .canvas-container {
-  position: relative;
-  width: 100%;
-  height: 100%;
-  min-height: calc(100vh - 180px);
-  background-color: #2a2a2a;
-  border: 2px solid #444;
-  border-radius: 8px;
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
   overflow: hidden;
-  display: flex;
-  align-items: center;
-  justify-content: center;
 }
 
 .canvas-container canvas {
@@ -45,16 +41,36 @@
 
 .selection-hint {
   position: absolute;
-  bottom: 10px;
+  bottom: 40px;
   left: 50%;
   transform: translateX(-50%);
   background-color: rgba(0, 0, 0, 0.8);
-  color: #00ff00;
-  padding: 8px 16px;
+  color: #0088ff;
+  padding: 6px 12px;
   border-radius: 4px;
-  font-size: 12px;
+  font-size: 11px;
   z-index: 10;
   white-space: nowrap;
+  pointer-events: none;
+}
+
+/* Clear selection button */
+.clear-selection-btn {
+  position: absolute;
+  top: 8px;
+  right: 8px;
+  background-color: #cc3333;
+  color: white;
+  padding: 6px 12px;
+  font-size: 11px;
+  border: none;
+  border-radius: 3px;
+  cursor: pointer;
+  z-index: 10;
+}
+
+.clear-selection-btn:hover {
+  background-color: #dd4444;
 }
 
 /* Zoom controls */