fix(git): follow symlinks when resolving a buffer's repo

lua/git/diff.lua

@@ -62,7 +62,7 @@ end
 ---@param buf integer
 ---@param rev ow.Git.Revision
 local function uri_split(opts, buf, rev)
-    local worktree = vim.b[buf].git_worktree or select(2, repo.resolve_cwd())
+    local worktree = vim.b[buf].git_worktree or select(2, repo.current_repo())
     if not worktree then
         util.warning("git URI buffer has no worktree")
         return
@@ -154,16 +154,13 @@ function M.split(opts)
         util.warning("cannot diff this buffer (not a worktree file)")
         return
     end
-    local _, worktree = repo.resolve(cur_path)
+    local _, worktree, cur_path = repo.resolve(cur_path)
     if not worktree then
         util.warning("not in a git repository")
         return
     end
+    ---@cast cur_path -nil
     local rel = vim.fs.relpath(worktree, cur_path)
-    if not rel then
-        util.warning("file is outside the worktree")
-        return
-    end
 
     local rev
     if not opts.rev then