优化提交代码的处理逻辑，避免一些情况无法提交代码

src-tauri/src/commands/folders.rs

@@ -1566,9 +1566,33 @@ pub(crate) async fn git_commit_core(
     message: &str,
     files: &[String],
 ) -> Result<GitCommitResult, AppCommandError> {
-    // Stage selected files
+    // Find files already staged for deletion — git add would fail on these
+    // because they no longer exist in either the working tree or the index.
+    let staged_deletions: std::collections::HashSet<String> =
+        crate::process::tokio_command("git")
+            .args(["diff", "--cached", "--name-only", "--diff-filter=D", "-z"])
+            .current_dir(path)
+            .output()
+            .await
+            .ok()
+            .map(|o| {
+                String::from_utf8_lossy(&o.stdout)
+                    .split('\0')
+                    .filter(|s| !s.is_empty())
+                    .map(|s| s.to_string())
+                    .collect()
+            })
+            .unwrap_or_default();
+
+    // Stage only files that aren't already staged deletions
+    let files_to_add: Vec<_> = files
+        .iter()
+        .filter(|f| !staged_deletions.contains(f.as_str()))
+        .collect();
+
+    if !files_to_add.is_empty() {
         let mut add_args = vec!["add".to_string(), "--".to_string()];
-    add_args.extend(files.iter().map(|file| to_git_literal_pathspec(file)));
+        add_args.extend(files_to_add.iter().map(|file| to_git_literal_pathspec(file)));
 
         let add_output = crate::process::tokio_command("git")
             .args(&add_args)
@@ -1580,6 +1604,7 @@ pub(crate) async fn git_commit_core(
         if !add_output.status.success() {
             return Err(git_command_error("add", &add_output.stderr));
         }
+    }
 
     // Resolve commit author from matching account (e.g. GitHub username)
     let author_override =

src/app/commit/page.tsx

@@ -12,6 +12,7 @@ import { CommitWorkspace } from "@/components/layout/commit-dialog"
 import { AppTitleBar } from "@/components/layout/app-title-bar"
 import { AppToaster } from "@/components/ui/app-toaster"
 import { getFolder } from "@/lib/api"
+import { toErrorMessage } from "@/lib/app-error"
 import type { FolderDetail } from "@/lib/types"
 
 const TOAST_DURATION_MS = 6000
@@ -67,7 +68,7 @@ function CommitPageInner() {
           setState({
             loadedId: normalizedFolderId,
             folder: null,
-            error: String(err),
+            error: toErrorMessage(err),
           })
         }
       })

src/components/layout/commit-dialog.tsx

@@ -47,6 +47,7 @@ import { cn } from "@/lib/utils"
 import { toast } from "sonner"
 import { DiffViewer } from "@/components/diff/diff-viewer"
 import { languageFromPath } from "@/lib/language-detect"
+import { toErrorMessage } from "@/lib/app-error"
 
 interface CommitWorkspaceProps {
   folderPath: string
@@ -342,7 +343,7 @@ export function CommitWorkspace({
         await loadDiff(firstFile, result)
       }
     } catch (err) {
-      setError(String(err))
+      setError(toErrorMessage(err))
       setEntries([])
       setExpandedTrackedDirs(new Set())
       setExpandedUntrackedDirs(new Set())
@@ -432,7 +433,7 @@ export function CommitWorkspace({
       })
       onCommitted?.()
     } catch (err) {
-      setError(String(err))
+      setError(toErrorMessage(err))
     } finally {
       setCommitting(false)
     }
@@ -448,7 +449,7 @@ export function CommitWorkspace({
         toast.success(t("toasts.addedToVcs"), { description: file })
         void loadStatus()
       } catch (err) {
-        toast.error(t("toasts.addToVcsFailed"), { description: String(err) })
+        toast.error(t("toasts.addToVcsFailed"), { description: toErrorMessage(err) })
       }
     },
     [folderPath, loadStatus, t]
@@ -482,7 +483,7 @@ export function CommitWorkspace({
               void loadStatus()
             } catch (err) {
               toast.error(t("toasts.deleteFailed"), {
-                description: String(err),
+                description: toErrorMessage(err),
               })
             }
           })()
@@ -519,7 +520,7 @@ export function CommitWorkspace({
               void loadStatus()
             } catch (err) {
               toast.error(t("toasts.rollbackFailed"), {
-                description: String(err),
+                description: toErrorMessage(err),
               })
             }
           })()
@@ -558,7 +559,7 @@ export function CommitWorkspace({
               void loadStatus()
             } catch (err) {
               toast.error(t("toasts.rollbackFailed"), {
-                description: String(err),
+                description: toErrorMessage(err),
               })
             }
           })()
@@ -597,7 +598,7 @@ export function CommitWorkspace({
               void loadStatus()
             } catch (err) {
               toast.error(t("toasts.deleteFailed"), {
-                description: String(err),
+                description: toErrorMessage(err),
               })
             }
           })()
@@ -616,7 +617,7 @@ export function CommitWorkspace({
         toast.success(t("toasts.addedToVcs"), { description: label })
         void loadStatus()
       } catch (err) {
-        toast.error(t("toasts.addToVcsFailed"), { description: String(err) })
+        toast.error(t("toasts.addToVcsFailed"), { description: toErrorMessage(err) })
       }
     },
     [folderPath, loadStatus, t]