chore: rebrand webclaw to noxa

crates/noxa-llm/src/error.rs

@@ -0,0 +1,18 @@
+/// LLM-specific errors. Kept flat — one enum covers transport, provider, and parsing failures.
+#[derive(Debug, thiserror::Error)]
+pub enum LlmError {
+    #[error("HTTP error: {0}")]
+    Http(#[from] reqwest::Error),
+
+    #[error("no providers available")]
+    NoProviders,
+
+    #[error("all providers failed: {0}")]
+    AllProvidersFailed(String),
+
+    #[error("invalid JSON response: {0}")]
+    InvalidJson(String),
+
+    #[error("provider error: {0}")]
+    ProviderError(String),
+}