feat: add Home Feed with pull-to-refresh and gobackend.getLocalTime() API

- Add Home Feed/Explore feature with extension capabilities system
- Add pull-to-refresh on home feed (replaces refresh button)
- Add gobackend.getLocalTime() API for accurate device timezone detection
- Add YT Music Quick Picks UI with swipeable vertical format
- Fix greeting time showing wrong time due to Goja getTimezoneOffset() returning 0
- Update spotify-web and ytmusic extensions to use getLocalTime()
- Add Turkish language support
- Update CHANGELOG for v3.2.0

android/app/src/main/kotlin/com/zarz/spotiflac/MainActivity.kt

@@ -678,6 +678,21 @@ class MainActivity: FlutterActivity() {
                             }
                             result.success(null)
                         }
+                        // Extension Home Feed (Explore)
+                        "getExtensionHomeFeed" -> {
+                            val extensionId = call.argument<String>("extension_id") ?: ""
+                            val response = withContext(Dispatchers.IO) {
+                                Gobackend.getExtensionHomeFeedJSON(extensionId)
+                            }
+                            result.success(response)
+                        }
+                        "getExtensionBrowseCategories" -> {
+                            val extensionId = call.argument<String>("extension_id") ?: ""
+                            val response = withContext(Dispatchers.IO) {
+                                Gobackend.getExtensionBrowseCategoriesJSON(extensionId)
+                            }
+                            result.success(response)
+                        }
                         else -> result.notImplemented()
                     }
                 } catch (e: Exception) {