Refactor code for conciseness and clarity

Simplified conditional logic using Rust's let-else syntax, removed unused imports, and improved code readability in extractor.rs, lib.rs, uploader/line.rs, and stream-gears/server.rs. These changes reduce code complexity and improve maintainability.

crates/biliup/src/downloader/extractor.rs

@@ -58,7 +58,7 @@ impl Site {
         &mut self,
         fmt_file_name: &str,
         segment: Segmentable,
-        hook: Option<CallbackFn<'_>>,
+        _hook: Option<CallbackFn<'_>>,
     ) -> downloader::error::Result<()> {
         let fmt_file_name = fmt_file_name.replace("{title}", &self.title);
         self.client

crates/biliup/src/lib.rs

@@ -12,7 +12,7 @@ pub mod uploader;
 pub use uploader::bilibili;
 pub use uploader::credential;
 
-pub async fn retry<F, Fut, O, E: std::fmt::Display>(mut f: F) -> Result<O, E>
+pub async fn retry<F, Fut, O, E: std::fmt::Display>(f: F) -> Result<O, E>
 where
     F: FnMut() -> Fut,
     Fut: Future<Output = Result<O, E>>,
@@ -38,11 +38,10 @@ where
         match f().await {
             Err(e) if retries > 0 => {
                 // 如果提供了 should_retry 条件，检查是否应该重试
-                if let Some(ref predicate) = should_retry {
-                    if !predicate(&e) {
+                if let Some(ref predicate) = should_retry
+                    && !predicate(&e) {
                         break Err(e);
                     }
-                }
 
                 retries -= 1;
                 let jitter_factor =

crates/biliup/src/uploader/line.rs

@@ -12,7 +12,7 @@ use crate::error::Kind::{Custom, RateLimit};
 use crate::uploader::bilibili::{BiliBili, Video};
 use crate::uploader::line::upos::Upos;
 use std::time::Instant;
-use tracing::{info, warn};
+use tracing::info;
 
 pub mod upos;
 
@@ -56,16 +56,15 @@ impl Parcel {
             }
         };
 
-        if video.title.is_none() {
-            if let Some(filename) = self.video_file.filepath.file_stem().and_then(OsStr::to_str) {
+        if video.title.is_none()
+            && let Some(filename) = self.video_file.filepath.file_stem().and_then(OsStr::to_str) {
                 // B站限制分P视频标题不能超过80字符，需要截断
                 video.title = Some(if filename.chars().count() >= 80 {
                     Video::truncate_title(filename, 80)
                 } else {
                     filename.to_string()
                 });
-            }
-        };
+            };
         Ok(video)
     }
 }
@@ -163,9 +162,9 @@ impl Line {
             let response_text = response.text().await?;
 
             // 尝试解析JSON错误响应，检测限流错误（code: 601）
-            if let Ok(error_json) = serde_json::from_str::<serde_json::Value>(&response_text) {
-                if let Some(code) = error_json.get("code").and_then(|c| c.as_i64()) {
-                    if code == 601 {
+            if let Ok(error_json) = serde_json::from_str::<serde_json::Value>(&response_text)
+                && let Some(code) = error_json.get("code").and_then(|c| c.as_i64())
+                    && code == 601 {
                         let message = error_json
                             .get("message")
                             .and_then(|m| m.as_str())
@@ -174,8 +173,6 @@ impl Line {
                         // 直接返回限流错误，让调用方决定如何处理
                         return Err(RateLimit { code, message });
                     }
-                }
-            }
 
             return Err(Custom(format!(
                 "Failed to pre_upload from {}",

crates/stream-gears/src/server.rs

@@ -11,7 +11,7 @@ use biliup_cli::server::core::downloader::DanmakuClient;
 use biliup_cli::server::core::plugin::{DownloadBase, DownloadPlugin, StreamInfoExt, StreamStatus};
 use biliup_cli::server::errors::{AppError, AppResult};
 use biliup_cli::server::infrastructure::connection_pool::ConnectionManager;
-use biliup_cli::server::infrastructure::context::{Context, PluginContext, Worker};
+use biliup_cli::server::infrastructure::context::{PluginContext, Worker};
 use biliup_cli::server::infrastructure::models::StreamerInfo;
 use biliup_cli::server::infrastructure::repositories;
 use biliup_cli::server::infrastructure::repositories::get_upload_config;
@@ -31,7 +31,6 @@ use pythonize::pythonize;
 use std::collections::HashMap;
 use std::net::ToSocketAddrs;
 use std::ops::Deref;
-use std::path::PathBuf;
 use std::sync::{Arc, LazyLock, RwLock};
 use time::macros::format_description;
 use tracing::{debug, info, warn};