refactor(git): drop boolean params from pane constructors

lua/git/status_win.lua

@@ -383,27 +383,33 @@ end
 
 ---@param worktree string
 ---@param path string
----@param content boolean
 ---@return ow.Git.DiffSide
-local function head_pane(worktree, path, content)
+local function head_pane(worktree, path)
     return {
-        buf = content and diff.git_show_buf(worktree, "HEAD", path)
-            or diff.empty_buf(),
+        buf = diff.git_show_buf(worktree, "HEAD", path),
         name = "git://HEAD/" .. path,
     }
 end
 
+---@param path string
+---@return ow.Git.DiffSide
+local function head_empty_pane(path)
+    return { buf = diff.empty_buf(), name = "git://HEAD/" .. path }
+end
+
 ---@param worktree string
 ---@param path string
----@param exists boolean
 ---@return ow.Git.DiffSide
-local function worktree_pane(worktree, path, exists)
-    if exists then
+local function worktree_pane(worktree, path)
     return {
         buf = diff.load_file_buf(vim.fs.joinpath(worktree, path)),
         name = nil,
     }
 end
+
+---@param path string
+---@return ow.Git.DiffSide
+local function worktree_empty_pane(path)
     return { buf = diff.empty_buf(), name = "git://worktree/" .. path }
 end
 
@@ -430,19 +436,22 @@ local function other_pane(s, entry)
     local worktree = s.worktree
     if entry.section == "Staged" then
         if entry.x == "A" then
-            return head_pane(worktree, p, false)
+            return head_empty_pane(p)
         end
         if entry.x == "D" then
-            return head_pane(worktree, p, true)
+            return head_pane(worktree, p)
         end
         -- HEAD holds the pre-rename path
-        return head_pane(worktree, entry.orig or p, true)
+        return head_pane(worktree, entry.orig or p)
     end
     if entry.section == "Unstaged" then
-        return worktree_pane(worktree, p, entry.y ~= "D")
+        if entry.y == "D" then
+            return worktree_empty_pane(p)
+        end
+        return worktree_pane(worktree, p)
     end
     if entry.section == "Untracked" then
-        return worktree_pane(worktree, p, true)
+        return worktree_pane(worktree, p)
     end
 end