Fix license activation and plugin requests ignoring proxy settings (#393)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com

crates/yaak-api/src/error.rs

@@ -0,0 +1,9 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[error(transparent)]
+    ReqwestError(#[from] reqwest::Error),
+}
+
+pub type Result<T> = std::result::Result<T, Error>;

crates/yaak-api/src/lib.rs

@@ -0,0 +1,70 @@
+mod error;
+
+pub use error::{Error, Result};
+
+use log::{debug, warn};
+use reqwest::Client;
+use reqwest::header::{HeaderMap, HeaderValue};
+use std::time::Duration;
+use yaak_common::platform::{get_ua_arch, get_ua_platform};
+
+/// Build a reqwest Client configured for Yaak's own API calls.
+///
+/// Includes a custom User-Agent, JSON accept header, 20s timeout, gzip,
+/// and automatic OS-level proxy detection via sysproxy.
+pub fn yaak_api_client(version: &str) -> Result<Client> {
+    let platform = get_ua_platform();
+    let arch = get_ua_arch();
+    let ua = format!("Yaak/{version} ({platform}; {arch})");
+
+    let mut default_headers = HeaderMap::new();
+    default_headers.insert("Accept", HeaderValue::from_str("application/json").unwrap());
+
+    let mut builder = reqwest::ClientBuilder::new()
+        .timeout(Duration::from_secs(20))
+        .default_headers(default_headers)
+        .gzip(true)
+        .user_agent(ua);
+
+    if let Some(sys) = get_enabled_system_proxy() {
+        let proxy_url = format!("http://{}:{}", sys.host, sys.port);
+        match reqwest::Proxy::all(&proxy_url) {
+            Ok(p) => {
+                let p = if !sys.bypass.is_empty() {
+                    p.no_proxy(reqwest::NoProxy::from_string(&sys.bypass))
+                } else {
+                    p
+                };
+                builder = builder.proxy(p);
+            }
+            Err(e) => {
+                warn!("Failed to configure system proxy: {e}");
+            }
+        }
+    }
+
+    Ok(builder.build()?)
+}
+
+/// Returns the system proxy URL if one is enabled, e.g. `http://host:port`.
+pub fn get_system_proxy_url() -> Option<String> {
+    let sys = get_enabled_system_proxy()?;
+    Some(format!("http://{}:{}", sys.host, sys.port))
+}
+
+fn get_enabled_system_proxy() -> Option<sysproxy::Sysproxy> {
+    match sysproxy::Sysproxy::get_system_proxy() {
+        Ok(sys) if sys.enable => {
+            debug!("Detected system proxy: http://{}:{}", sys.host, sys.port);
+            Some(sys)
+        }
+        Ok(_) => {
+            debug!("System proxy detected but not enabled");
+            None
+        }
+        Err(e) => {
+            debug!("Could not detect system proxy: {e}");
+            None
+        }
+    }
+}