feat(scan): 阶段1 实时显示当前扫描的目录与文件

- walker: ProgressFn 签名增加 Option<&Path> 文件参数；每个文件命中时回调

- runner: on_progress 把当前文件写入 current_file 共享槽

- home: 阶段1 卡片新增 📄 当前文件：xxx 实时显示

src/scan/runner.rs

@@ -73,10 +73,14 @@ pub async fn run(
     let scan_scanned_cb = Arc::clone(&scan_scanned);
     let scan_found_cb   = Arc::clone(&scan_found);
     let scan_dir_cb     = Arc::clone(&scan_current_dir);
-    let mut on_progress = |_scanned: usize, found: usize, dir: &std::path::Path| {
+    let cur_file_cb     = Arc::clone(&current_file);
+    let mut on_progress = |_scanned: usize, found: usize, dir: &std::path::Path, file: Option<&std::path::Path>| {
         scan_scanned_cb.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
         scan_found_cb.store(found, std::sync::atomic::Ordering::Relaxed);
         if let Ok(mut g) = scan_dir_cb.lock() { *g = dir.display().to_string(); }
+        if let Some(f) = file {
+            if let Ok(mut g) = cur_file_cb.lock() { *g = Some(f.display().to_string()); }
+        }
     };
     let candidates = walker::walk(&cfg.scan, &cancel, |s| push_log(s.to_string()), &mut on_progress);
     let scan_ms = scan_started.elapsed().as_millis();

src/scan/walker.rs

@@ -11,7 +11,8 @@ use crate::scan::filter;
 /// - scanned_so_far: 已扫描的文件总数（仅候选类型）
 /// - found_so_far: 当前累计已收纳的候选数
 /// - current_dir: 当前正在扫描的目录路径
-pub type ProgressFn<'a> = &'a mut dyn FnMut(usize, usize, &Path);
+/// - current_file: 当前正在评估的文件路径（若是目录则为 None）
+pub type ProgressFn<'a> = &'a mut dyn FnMut(usize, usize, &Path, Option<&Path>);
 
 /// 遍历全盘，输出满足条件的文件路径
 pub fn walk(
@@ -58,6 +59,7 @@ pub fn walk(
                             scanned.load(Ordering::Relaxed),
                             found.load(Ordering::Relaxed),
                             p,
+                            None,
                         );
                     }
                 }
@@ -65,6 +67,15 @@ pub fn walk(
             }
             scanned.fetch_add(1, Ordering::Relaxed);
 
+            // 先把当前文件（及所在目录）回调给 UI，便于实时显示
+            let parent = p.parent().unwrap_or(p);
+            progress(
+                scanned.load(Ordering::Relaxed),
+                found.load(Ordering::Relaxed),
+                parent,
+                Some(p),
+            );
+
             if filter::is_whitelisted(p, &s.whitelist) { continue; }
             if !s.include_hidden && filter::is_hidden(p) { continue; }
             if !s.include_system && filter::is_system(p) { continue; }

src/ui/home.rs

@@ -94,6 +94,18 @@ pub fn draw(ui: &mut egui::Ui, app: &mut App) {
                 });
             }
         }
+        // 当前文件（仅在扫描阶段显示当前正在评估的文件）
+        if is_scanning {
+            if let Ok(cur) = app.current_file.lock() {
+                if let Some(f) = cur.as_ref() {
+                    ui.add_space(2.0);
+                    ui.horizontal(|ui| {
+                        ui.label("📄 当前文件：");
+                        ui.label(egui::RichText::new(shorten_path(f, 100)).monospace().color(material::PRIMARY_DARK));
+                    });
+                }
+            }
+        }
     });
 
     ui.add_space(6.0);