Replace hardcoded developer public key with Amber.DEVELOPER_HEX_KEY constant

- Define `DEVELOPER_HEX_KEY` constant in `Amber.kt` to centralize the developer's public key.
- Update `EventData.kt`, `CrashReportScreen.kt`, and `Amber.kt` to use the new constant instead of the hardcoded hex string when generating Nostr URI intents, direct messages, and Git issue events.
- Suppress unused exception variable in `Amber.isSocksProxyAlive`.

app/src/main/java/com/greenart7c3/nostrsigner/Amber.kt

@@ -151,7 +151,7 @@ class Amber :
                 socket.connect(InetSocketAddress(proxyHost, port), 5000)
                 socket.close()
                 true
-            } catch (e: Exception) {
+            } catch (_: Exception) {
                 false
             }
         }
@@ -521,7 +521,7 @@ class Amber :
 
         val repositoryEvent = GitRepositoryEvent(
             "",
-            "7579076d9aff0a4cfdefa7e2045f2486c7e5d8bc63bfc6b45397233e1bbfcb19",
+            DEVELOPER_HEX_KEY,
             TimeUtils.now(),
             tags = arrayOf(arrayOf("d", "Amber")),
             "",
@@ -532,7 +532,7 @@ class Amber :
             subject,
             body,
             EventHintBundle(repositoryEvent),
-            listOf(PTag("7579076d9aff0a4cfdefa7e2045f2486c7e5d8bc63bfc6b45397233e1bbfcb19", null)),
+            listOf(PTag(DEVELOPER_HEX_KEY, null)),
             listOf(if (type == FeedbackType.BUG_REPORT) "bug" else "enhancement"),
         )
 
@@ -551,6 +551,8 @@ class Amber :
         const val TAG = "Amber"
         lateinit var instance: Amber
             private set
+
+        const val DEVELOPER_HEX_KEY = "7579076d9aff0a4cfdefa7e2045f2486c7e5d8bc63bfc6b45397233e1bbfcb19"
     }
 }
 

app/src/main/java/com/greenart7c3/nostrsigner/ui/CrashReportScreen.kt

@@ -137,7 +137,7 @@ fun CrashReportScreen(
                                     ClipEntry(ClipData.newPlainText("", report)),
                                 )
                                 val intent = Intent(Intent.ACTION_VIEW)
-                                val npub = Hex.decode("7579076d9aff0a4cfdefa7e2045f2486c7e5d8bc63bfc6b45397233e1bbfcb19").toNpub()
+                                val npub = Hex.decode(Amber.DEVELOPER_HEX_KEY).toNpub()
                                 intent.data = "nostr:$npub".toUri()
                                 intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
                                 Amber.instance.startActivity(intent)
@@ -155,7 +155,7 @@ fun CrashReportScreen(
 
                             val template = ChatMessageEvent.build(
                                 msg = report,
-                                to = listOf(PTag("7579076d9aff0a4cfdefa7e2045f2486c7e5d8bc63bfc6b45397233e1bbfcb19")),
+                                to = listOf(PTag(Amber.DEVELOPER_HEX_KEY)),
                                 createdAt = System.currentTimeMillis() / 1000,
                             ) {
                                 val thirtyDaysInSeconds = 30L * 86_400

app/src/main/java/com/greenart7c3/nostrsigner/ui/components/EventData.kt

@@ -247,7 +247,7 @@ fun ReportMissingEventKindButton(account: Account, kind: Int) {
                         ),
                     )
                     val intent = Intent(Intent.ACTION_VIEW)
-                    val npub = Hex.decode("7579076d9aff0a4cfdefa7e2045f2486c7e5d8bc63bfc6b45397233e1bbfcb19").toNpub()
+                    val npub = Hex.decode(Amber.DEVELOPER_HEX_KEY).toNpub()
                     intent.data = "nostr:$npub".toUri()
                     intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
                     Amber.instance.startActivity(intent)
@@ -258,7 +258,7 @@ fun ReportMissingEventKindButton(account: Account, kind: Int) {
                     client.connect()
                     val template = ChatMessageEvent.build(
                         msg = text,
-                        to = listOf(PTag("7579076d9aff0a4cfdefa7e2045f2486c7e5d8bc63bfc6b45397233e1bbfcb19")),
+                        to = listOf(PTag(Amber.DEVELOPER_HEX_KEY)),
                         createdAt = System.currentTimeMillis() / 1000,
                     ) {
                         val tenDaysInSeconds = 10L * 86_400