git_ui: Fix double slash in commit URLs (#44996)

Release Notes:

- Fixed double slash in commit URLs

The github_url variable was generating URLs with an extra slash like
"https://github.com//user/repo/commit/xxxx" due to manual string
formatting
of the base_url() result.

Fixed by replacing manual URL construction with the proper
build_commit_permalink() method that uses Url::join() for correct
path handling, consistent with how other Git hosting providers
construct URLs.

Signed-off-by: Xiaobo Liu <cppcoffee@gmail.com>

crates/git_ui/src/commit_view.rs

@@ -3,7 +3,10 @@ use buffer_diff::{BufferDiff, BufferDiffSnapshot};
 use editor::display_map::{BlockPlacement, BlockProperties, BlockStyle};
 use editor::{Editor, EditorEvent, ExcerptRange, MultiBuffer, multibuffer_context_lines};
 use git::repository::{CommitDetails, CommitDiff, RepoPath};
-use git::{GitHostingProviderRegistry, GitRemote, parse_git_remote_url};
+use git::{
+    BuildCommitPermalinkParams, GitHostingProviderRegistry, GitRemote, ParsedGitRemote,
+    parse_git_remote_url,
+};
 use gpui::{
     AnyElement, App, AppContext as _, AsyncApp, AsyncWindowContext, Context, Element, Entity,
     EventEmitter, FocusHandle, Focusable, InteractiveElement, IntoElement, ParentElement,
@@ -393,13 +396,15 @@ impl CommitView {
 
         let remote_info = self.remote.as_ref().map(|remote| {
             let provider = remote.host.name();
-            let url = format!(
-                "{}/{}/{}/commit/{}",
-                remote.host.base_url(),
-                remote.owner,
-                remote.repo,
-                commit.sha
-            );
+            let parsed_remote = ParsedGitRemote {
+                owner: remote.owner.as_ref().into(),
+                repo: remote.repo.as_ref().into(),
+            };
+            let params = BuildCommitPermalinkParams { sha: &commit.sha };
+            let url = remote
+                .host
+                .build_commit_permalink(&parsed_remote, params)
+                .to_string();
             (provider, url)
         });