Add start conflict prompts for existing extracted packages in v1.4.2

src/renderer/styles.css

@@ -634,6 +634,48 @@ td {
   backdrop-filter: blur(2px);
 }
 
+.modal-backdrop {
+  position: fixed;
+  inset: 0;
+  background: rgba(4, 9, 18, 0.68);
+  display: grid;
+  place-items: center;
+  z-index: 20;
+  padding: 20px;
+}
+
+.modal-card {
+  width: min(560px, 100%);
+  border: 1px solid var(--border);
+  border-radius: 14px;
+  background: linear-gradient(180deg, color-mix(in srgb, var(--card) 98%, transparent), color-mix(in srgb, var(--surface) 98%, transparent));
+  box-shadow: 0 20px 38px rgba(0, 0, 0, 0.35);
+  padding: 16px;
+  display: grid;
+  gap: 10px;
+}
+
+.modal-card h3 {
+  margin: 0;
+}
+
+.modal-card p {
+  margin: 0;
+  color: var(--muted);
+}
+
+.modal-path {
+  font-size: 12px;
+  word-break: break-all;
+}
+
+.modal-actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: 8px;
+  flex-wrap: wrap;
+}
+
 @media (max-width: 1100px) {
   .control-strip {
     flex-direction: column;