feat(system): use last 2 folder layers for project name

Previously, get_project_name() only returned the last folder layer
(e.g., "coding-extension-vim"). This caused context loss when
multiple projects have similar subfolder names like "frontend".

Now returns the last 2 layers (e.g., "malamtime/coding-extension-vim")
for better project identification in heartbeat data.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: AnnatarHe

lua/shelltime/utils/system.lua

@@ -80,11 +80,16 @@ function M.get_project_root(file_path)
   return vim.fn.fnamemodify(file_path, ':p:h')
 end
 
---- Get project name from root path
+--- Get project name from root path (last 2 folder layers)
 ---@param project_root string Project root path
 ---@return string Project name
 function M.get_project_name(project_root)
-  return vim.fn.fnamemodify(project_root, ':t')
+  local tail = vim.fn.fnamemodify(project_root, ':t')
+  local parent = vim.fn.fnamemodify(project_root, ':h:t')
+  if parent and parent ~= '' and parent ~= '/' then
+    return parent .. '/' .. tail
+  end
+  return tail
 end
 
 --- Generate UUID v4

tests/system_spec.lua

@@ -181,12 +181,12 @@ describe('shelltime.utils.system', function()
   end)
 
   describe('get_project_name', function()
-    it('should extract directory name from path', function()
+    it('should extract last 2 folder layers from path', function()
       local name = system.get_project_name('/home/user/projects/myapp')
-      assert.equals('myapp', name)
+      assert.equals('projects/myapp', name)
     end)
 
-    it('should handle simple path', function()
+    it('should handle simple path with only 1 layer', function()
       local name = system.get_project_name('/myapp')
       assert.equals('myapp', name)
     end)
@@ -196,6 +196,8 @@ describe('shelltime.utils.system', function()
       local name = system.get_project_name(project_dir)
       assert.is_string(name)
       assert.is_true(#name > 0)
+      -- Should contain a slash for 2 layers
+      assert.is_true(name:find('/') ~= nil)
     end)
   end)
 end)