feat: configurable auto-download limit, fix Android MY_KEYS race

Add auto-download size limit dropdown in Storage settings (Off, 1-100 MB)
persisted via sql_setting. Fix Android background sync not setting MY_KEYS
in globals — caused login_from_stored_key to early-return without keys,
breaking all message sends after resuming from background.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: JSKitty

src-tauri/src/android/background_sync.rs

@@ -16,7 +16,7 @@ use std::collections::HashSet;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, Mutex, OnceLock};
 
-use crate::{NOSTR_CLIENT, MY_PUBLIC_KEY};
+use crate::{NOSTR_CLIENT, MY_KEYS, MY_PUBLIC_KEY};
 use crate::commands::relays::DEFAULT_RELAYS;
 use crate::services::event_handler::handle_event_with_context;
 
@@ -248,22 +248,25 @@ fn run_standalone_sync_loop(data_dir: &str) {
 
     rt.block_on(async {
         // Bootstrap the standalone client — get connected ASAP
-        let (client, my_public_key, can_decrypt) = match bootstrap_client(data_dir).await {
+        let (client, my_public_key, can_decrypt, keys) = match bootstrap_client(data_dir).await {
             Ok(result) => result,
             Err(e) => {
                 logcat(&format!("Failed to bootstrap client: {}", e));
                 return;
             }
         };
 
-        // Store the client and public key in globals so headless operations
+        // Store the client, keys, and public key in globals so headless operations
         // (notification reply, mark-as-read) can use them in service-only mode.
         // ONLY set for unencrypted accounts — encrypted accounts use a signerless
         // client that would poison the OnceCell and prevent the full app from
         // creating a proper client with signer after PIN unlock.
         if can_decrypt {
             let _ = NOSTR_CLIENT.set(client.clone());
             let _ = MY_PUBLIC_KEY.set(my_public_key);
+            if let Some(keys) = keys {
+                let _ = MY_KEYS.set(keys);
+            }
         }
 
         // Subscribe to GiftWraps addressed to us (DMs, files, MLS welcomes)
@@ -402,7 +405,7 @@ fn run_standalone_sync_loop(data_dir: &str) {
 /// Returns (client, public_key, can_decrypt).
 /// When local encryption is enabled, returns a read-only client (no signer) that can
 /// subscribe to events but not decrypt them — used for generic "New message" notifications.
-async fn bootstrap_client(data_dir: &str) -> Result<(Client, PublicKey, bool), String> {
+async fn bootstrap_client(data_dir: &str) -> Result<(Client, PublicKey, bool, Option<Keys>), String> {
     let data_path = std::path::Path::new(data_dir);
 
     // Scan for npub directories
@@ -486,7 +489,7 @@ async fn bootstrap_client(data_dir: &str) -> Result<(Client, PublicKey, bool), S
         logcat(&format!("Connecting to {} relays...", DEFAULT_RELAYS.len()));
         client.connect().await;
 
-        Ok((client, my_public_key, false))
+        Ok((client, my_public_key, false, None))
     } else {
         // Normal account — full signer client
         let pkey: String = conn
@@ -508,7 +511,7 @@ async fn bootstrap_client(data_dir: &str) -> Result<(Client, PublicKey, bool), S
             &my_public_key.to_bech32().unwrap_or_default()[..20.min(my_public_key.to_bech32().unwrap_or_default().len())]));
 
         let client = Client::builder()
-            .signer(keys)
+            .signer(keys.clone())
             .build();
 
         for relay_url in DEFAULT_RELAYS {
@@ -520,7 +523,7 @@ async fn bootstrap_client(data_dir: &str) -> Result<(Client, PublicKey, bool), S
         logcat(&format!("Connecting to {} relays...", DEFAULT_RELAYS.len()));
         client.connect().await;
 
-        Ok((client, my_public_key, true))
+        Ok((client, my_public_key, true, Some(keys)))
     }
 }
 

src/index.html

@@ -1007,6 +1007,20 @@ <h2>Storage</h2>
                       <div id="storage-bar" style="height: 100%; display: flex;"></div>
                     </div>
                   </div>
+                  <div class="form-group" style="display: flex; align-items: center; margin-top: 15px;">
+                    <span style="flex: 1;">Auto-Download Limit</span>
+                    <div class="select-container" style="margin: 0;">
+                      <select id="auto-download-limit" style="margin-bottom: 0 !important;">
+                        <option value="0">Off</option>
+                        <option value="1048576">1 MB</option>
+                        <option value="5242880">5 MB</option>
+                        <option value="10485760" selected>10 MB</option>
+                        <option value="26214400">25 MB</option>
+                        <option value="52428800">50 MB</option>
+                        <option value="104857600">100 MB</option>
+                      </select>
+                    </div>
+                  </div>
                   <div class="form-group" style="margin-top: 15px;">
                     <button id="clear-storage-btn" class="btn cancel-btn">Clear Storage</button>
                   </div>

src/js/db.js

@@ -1,3 +1,12 @@
+async function loadMaxAutoDownloadBytes() {
+    const value = await invoke('get_sql_setting', { key: 'max_auto_download_bytes' });
+    return value !== null && value !== undefined ? parseInt(value, 10) : 10485760;
+}
+
+async function saveMaxAutoDownloadBytes(bytes) {
+    await invoke('set_sql_setting', { key: 'max_auto_download_bytes', value: String(bytes) });
+}
+
 /**
  * Save the user-selected Whisper Model ID
  * @param {string} name - The model ID

src/js/settings.js

@@ -1135,6 +1135,19 @@ async function initStorageSection() {
         // Render file type distribution bar
         renderFileTypeDistribution(storageInfo.type_distribution, storageInfo.file_count);
     }
+
+    // Auto-download limit
+    const savedLimit = await loadMaxAutoDownloadBytes();
+    MAX_AUTO_DOWNLOAD_BYTES = savedLimit;
+    const limitSelect = document.getElementById('auto-download-limit');
+    if (limitSelect) {
+        limitSelect.value = String(savedLimit);
+        limitSelect.addEventListener('change', async () => {
+            const bytes = parseInt(limitSelect.value, 10);
+            MAX_AUTO_DOWNLOAD_BYTES = bytes;
+            await saveMaxAutoDownloadBytes(bytes);
+        });
+    }
 }
 
 function renderFileTypeDistribution(typeDistribution, totalBytes) {

src/styles.css

@@ -4083,6 +4083,24 @@ select:focus::-ms-value {
     padding-right: 36px;
 }
 
+#auto-download-limit {
+    text-align: center;
+    text-align-last: center;
+    appearance: none;
+    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23888'/%3E%3C/svg%3E");
+    background-repeat: no-repeat;
+    background-position: right 12px center;
+    background-size: 10px;
+    padding-right: 36px;
+    width: auto;
+}
+
+#auto-download-limit option {
+    background: #171717;
+    text-align: center;
+    padding: 10px;
+}
+
 /* Delete model button with trash bin icon */
 .btn-delete-model {
   position: absolute;