fix(tray-binary): fix sync state parsing, version display, add close button

- Parse versioned sync-state.json format (categories nested under struct)
- Fix double-v in version display (git describe already includes v prefix)
- Add close button to dashboard panel header

Author: jung-thomas

cmd/sap-devs-tray/frontend/css/app.css

@@ -33,11 +33,27 @@ body {
 }
 
 .panel-header .version {
-    margin-left: auto;
     font-size: 12px;
     color: var(--sapContent_LabelColor, #6a6d70);
 }
 
+.panel-header .close-btn {
+    margin-left: auto;
+    background: none;
+    border: none;
+    font-size: 18px;
+    cursor: pointer;
+    color: var(--sapContent_LabelColor, #6a6d70);
+    padding: 2px 6px;
+    border-radius: 4px;
+    line-height: 1;
+}
+
+.panel-header .close-btn:hover {
+    background: var(--sapNeutralBackground, #eaecee);
+    color: var(--sapTextColor, #32363a);
+}
+
 .status-card, .profile-card, .tools-card {
     margin: 0 16px 12px;
     padding: 14px;

cmd/sap-devs-tray/frontend/index.html

@@ -17,6 +17,7 @@
         </svg>
         <span class="title">sap-devs</span>
         <span class="version" id="version">v...</span>
+        <button type="button" class="close-btn" id="btn-close" title="Close">&times;</button>
     </div>
 
     <div class="status-card">

cmd/sap-devs-tray/frontend/js/app.js

@@ -42,7 +42,8 @@
 
         setText('profile-name', state.profile.name || state.profile.id);
         setText('profile-id', state.profile.id);
-        setText('version', 'v' + state.version);
+        var ver = state.version;
+        setText('version', ver.charAt(0) === 'v' ? ver : 'v' + ver);
     }
 
     function setText(id, text) {
@@ -76,6 +77,17 @@
     }
 
     document.addEventListener('DOMContentLoaded', function() {
+        var btnClose = document.getElementById('btn-close');
+        if (btnClose) {
+            btnClose.addEventListener('click', function() {
+                if (window.wails && window.wails.Window) {
+                    window.wails.Window.Hide();
+                } else {
+                    window.close();
+                }
+            });
+        }
+
         var btnSync = document.getElementById('btn-sync');
         if (btnSync) {
             btnSync.addEventListener('click', function() {

cmd/sap-devs-tray/state.go

@@ -44,13 +44,16 @@ func readSyncState(cacheDir string) SyncState {
 	if err != nil {
 		return SyncState{Status: "unknown"}
 	}
-	var raw map[string]time.Time
+	var raw struct {
+		Version    int                  `json:"version"`
+		Categories map[string]time.Time `json:"categories"`
+	}
 	if err := json.Unmarshal(data, &raw); err != nil {
 		return SyncState{Status: "unknown"}
 	}
 	var latest time.Time
 	count := 0
-	for _, t := range raw {
+	for _, t := range raw.Categories {
 		count++
 		if t.After(latest) {
 			latest = t