fix: resolve all cargo clippy warnings

- daemon: Box::pin large future in heartbeat worker
- wizard: remove redundant match arms with identical bodies, fix stale
  test that expected venice to be unsupported
- proxy_config: allow clippy::option_option on intentional partial-update
  return type
- matrix: use String::new() instead of "".to_string()
- reliable: return expression directly instead of let-and-return

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

src/channels/matrix.rs

@@ -726,7 +726,7 @@ mod tests {
             "!r:m".to_string(),
             vec![],
             Some("   ".to_string()),
-            Some("".to_string()),
+            Some(String::new()),
         );
 
         assert!(ch.session_user_id_hint.is_none());

src/daemon/mod.rs

@@ -66,7 +66,7 @@ pub async fn run(config: Config, host: String, port: u16) -> Result<()> {
             max_backoff,
             move || {
                 let cfg = heartbeat_cfg.clone();
-                async move { run_heartbeat_worker(cfg).await }
+                async move { Box::pin(run_heartbeat_worker(cfg)).await }
             },
         ));
     }

src/onboard/wizard.rs

@@ -500,7 +500,6 @@ const MINIMAX_ONBOARD_MODELS: [(&str, &str); 5] = [
 fn default_model_for_provider(provider: &str) -> String {
     match canonical_provider_name(provider) {
         "anthropic" => "claude-sonnet-4-5-20250929".into(),
-        "openrouter" => "anthropic/claude-sonnet-4.6".into(),
         "openai" => "gpt-5.2".into(),
         "openai-codex" => "gpt-5-codex".into(),
         "venice" => "zai-org-glm-5".into(),
@@ -520,7 +519,6 @@ fn default_model_for_provider(provider: &str) -> String {
         "gemini" => "gemini-2.5-pro".into(),
         "kimi-code" => "kimi-for-coding".into(),
         "nvidia" => "meta/llama-3.3-70b-instruct".into(),
-        "astrai" => "anthropic/claude-sonnet-4.6".into(),
         _ => "anthropic/claude-sonnet-4.6".into(),
     }
 }
@@ -5190,7 +5188,7 @@ mod tests {
 
         let config = Config {
             workspace_dir: tmp.path().to_path_buf(),
-            default_provider: Some("venice".to_string()),
+            default_provider: Some("unknown-provider".to_string()),
             ..Config::default()
         };
 

src/providers/reliable.rs

@@ -45,14 +45,12 @@ fn is_non_retryable(err: &anyhow::Error) -> bool {
         return true;
     }
 
-    let model_catalog_mismatch = msg_lower.contains("model")
+    msg_lower.contains("model")
         && (msg_lower.contains("not found")
             || msg_lower.contains("unknown")
             || msg_lower.contains("unsupported")
             || msg_lower.contains("does not exist")
-            || msg_lower.contains("invalid"));
+            || msg_lower.contains("invalid"))
-
-    model_catalog_mismatch
 }
 
 /// Check if an error is a rate-limit (429) error.

src/tools/proxy_config.rs

@@ -93,6 +93,7 @@ impl ProxyConfigTool {
         anyhow::bail!("'{field}' must be a string or string[]")
     }
 
+    #[allow(clippy::option_option)] // Outer=field present, inner=value-or-null (partial update)
     fn parse_optional_string_update(
         args: &Value,
         field: &str,