Many improvemtns and fixes related to decoupling of svelte and rust on android.

src-tauri/src/download/worker.rs

@@ -21,6 +21,7 @@ impl DownloadWorker {
     pub fn new() -> Self {
         let client = reqwest::Client::builder()
             .timeout(Duration::from_secs(300)) // 5 minute timeout
+            .https_only(true)
             .build()
             .expect("Failed to create HTTP client");
 
@@ -31,14 +32,18 @@ impl DownloadWorker {
     }
 
     /// Download a file with retry logic and progress tracking
-    pub async fn download(
+    pub async fn download<F>(
         &self,
         task: &DownloadTask,
-    ) -> Result<DownloadResult, DownloadError> {
+        on_progress: F,
+    ) -> Result<DownloadResult, DownloadError>
+    where
+        F: Fn(u64, Option<u64>) + Send + Sync,
+    {
         let mut retries = 0;
 
         loop {
-            match self.try_download(task).await {
+            match self.try_download(task, &on_progress).await {
                 Ok(result) => return Ok(result),
                 Err(e) if retries < self.max_retries && e.is_retryable() => {
                     retries += 1;
@@ -55,7 +60,10 @@ impl DownloadWorker {
     }
 
     /// Attempt a single download
-    async fn try_download(&self, task: &DownloadTask) -> Result<DownloadResult, DownloadError> {
+    async fn try_download<F>(&self, task: &DownloadTask, on_progress: &F) -> Result<DownloadResult, DownloadError>
+    where
+        F: Fn(u64, Option<u64>) + Send + Sync,
+    {
         // Create parent directories
         if let Some(parent) = task.target_path.parent() {
             fs::create_dir_all(parent)
@@ -129,7 +137,7 @@ impl DownloadWorker {
                 || downloaded % (1024 * 1024) == 0
             {
                 last_progress_emit = std::time::Instant::now();
-                // Progress events will be emitted by the manager
+                on_progress(downloaded, _total_bytes);
             }
         }