fix(aprs): passcode compute button, crash log, notif permission, login verify

User feedback round 2 (4.5.4): no notification shown, report not
sending, no error visibility on crash. Diagnosis: APRS-IS port 14580
reachable (verified with real login test), 24580 SSL refused; login
format OK. Fixes:

- Settings dialog: "Compute passcode" button - fills passcode from
  callsign via the ported 0x73E2 algorithm (user can see the result)
- Global crash handler in MainApplication: stack trace appended to
  files/crash_log.txt so crashes are diagnosable (user: no crash logs
  were available before)
- POST_NOTIFICATIONS runtime permission requested when enabling APRS
  (Android 13+ otherwise silently hides the service notification)
- AprsIsClient: read the login response (aprsc "# logresp ...
  unverified"/"Invalid") and surface the server message as the error
- AprsForegroundService: Toast on manual report result (OK / failure
  with server reason)
- Strings EN/ZH/TR/IN/ID +3 keys
Verified: compileDebugKotlin all modules BUILD SUCCESSFUL,
check_strings 9 files OK.

core/data/src/main/java/com/rtbishop/look4sat/core/data/aprs/AprsIsClient.kt

@@ -46,6 +46,17 @@ class AprsIsClient(
         // 登录行
         val login = AprsPacket.formatLogin(callsign, ssid, passcode, version) + filter
         writer?.println(login)
+        // 读登录响应(aprsc 返回 # logresp ... verified/unverified)
+        runCatching {
+            s.soTimeout = 8000
+            val resp = reader?.readLine()
+            if (resp != null && (resp.contains("Invalid", ignoreCase = true) ||
+                    resp.contains("unverified", ignoreCase = true))) {
+                throw IllegalArgumentException(resp.trim())
+            }
+            // 恢复超时
+            s.soTimeout = timeoutSec * 1000
+        }
     }
 
     /** 发送一个 APRS 包(一行) */