chore: clean up code — remove dead code, stale allows, eprintln→tracing, remove volatile data from docs

src/api/responses.rs

@@ -80,7 +80,6 @@ struct ResponseData {
 }
 
 /// Build a full Response object matching the official OpenAI schema.
-#[allow(clippy::too_many_arguments)]
 fn build_response_object(data: ResponseData, params: &RequestParams) -> ResponsesResponse {
     ResponsesResponse {
         id: data.id,

src/constants.rs

@@ -115,8 +115,8 @@ fn detect_versions() -> DetectedVersions {
     const FALLBACK_CLIENT: &str = "1.16.5";
 
     let Some(install_dir) = find_install_dir() else {
-        eprintln!(
-            "[constants] ⚠ Could not find Antigravity install — using fallback versions"
+        tracing::warn!(
+            "Could not find Antigravity install — using fallback versions"
         );
         return DetectedVersions {
             antigravity: FALLBACK_ANTIGRAVITY.to_string(),
@@ -139,9 +139,12 @@ fn detect_versions() -> DetectedVersions {
         client: client_ver.unwrap_or_else(|| FALLBACK_CLIENT.to_string()),
     };
 
-    eprintln!(
-        "[constants] ✓ Detected versions: Antigravity={}, Chrome={}, Electron={}, Client={}",
-        versions.antigravity, versions.chrome, versions.electron, versions.client
+    tracing::info!(
+        antigravity = %versions.antigravity,
+        chrome = %versions.chrome,
+        electron = %versions.electron,
+        client = %versions.client,
+        "Detected app versions"
     );
 
     versions

src/mitm/store.rs

@@ -147,14 +147,6 @@ impl MitmStore {
         latest.remove(cascade_id)
     }
 
-    /// Peek at the latest usage without consuming it.
-    #[allow(dead_code)]
-    pub async fn peek_usage(&self, cascade_id: &str) -> Option<ApiUsage> {
-        let latest = self.latest_usage.read().await;
-        latest.get(cascade_id)
-            .cloned()
-    }
-
     /// Get aggregate stats.
     pub async fn stats(&self) -> MitmStats {
         self.stats.read().await.clone()

src/snapshot.rs

@@ -35,8 +35,6 @@ fn domain_label(domain: &str) -> (&str, &str) {
 
 const BOLD: &str = "\x1b[1m";
 const DIM: &str = "\x1b[2m";
-#[allow(dead_code)]
-const RED: &str = "\x1b[91m";
 const GREEN: &str = "\x1b[92m";
 const YELLOW: &str = "\x1b[93m";
 const CYAN: &str = "\x1b[96m";