rever commit/4b1c2419 but keeping contact picker fix

app/src/main/java/sh/sar/basedbank/util/CredentialStore.kt

@@ -79,41 +79,9 @@ class CredentialStore(context: Context) {
             .remove("mib_${loginId}_enc_profile")
             .remove("mib_${loginId}_enc_full_name")
             .remove("mib_${loginId}_hidden_profile_ids")
-            .remove("mib_${loginId}_enc_session")
             .apply()
     }
 
-    // ── MIB active session (xxid + sessionKey + nonceGenerator) ─────────────────
-
-    fun saveMibSession(loginId: String, session: sh.sar.basedbank.api.mib.MibSession) {
-        val json = JSONObject().apply {
-            put("xxid", session.xxid)
-            put("sessionKey", session.sessionKey)
-            put("nonceGenerator", session.nonceGenerator)
-            put("appId", session.appId)
-        }.toString()
-        val key = getOrCreateKey()
-        prefs.edit().putString("mib_${loginId}_enc_session", encrypt(json, key)).apply()
-    }
-
-    fun loadMibSession(loginId: String): sh.sar.basedbank.api.mib.MibSession? {
-        val key = getOrCreateKey()
-        val enc = prefs.getString("mib_${loginId}_enc_session", null) ?: return null
-        return try {
-            val o = JSONObject(decrypt(enc, key))
-            sh.sar.basedbank.api.mib.MibSession(
-                appId          = o.getString("appId"),
-                xxid           = o.getString("xxid"),
-                nonceGenerator = o.getString("nonceGenerator"),
-                sessionKey     = o.getString("sessionKey")
-            )
-        } catch (_: Exception) { null }
-    }
-
-    fun clearMibSession(loginId: String) {
-        prefs.edit().remove("mib_${loginId}_enc_session").apply()
-    }
-
     // ── MIB session keys (key1/key2) and app ID (per loginId) ────────────────
 
     fun saveMibKeys(loginId: String, key1: String, key2: String) {