feat(ux): implement masonry dashboard layout and immersive focus mode

_bmad/bmm/workflows/4-implementation/retrospective/workflow.yaml

@@ -4,7 +4,6 @@ description: "Run after epic completion to review overall success, extract lesso
 author: "BMad"
 
 config_source: "{project-root}/_bmad/bmm/config.yaml"
-output_folder: "{config_source}:implementation_artifacts}"
 user_name: "{config_source}:user_name"
 communication_language: "{config_source}:communication_language"
 user_skill_level: "{config_source}:user_skill_level"
@@ -12,6 +11,7 @@ document_output_language: "{config_source}:document_output_language"
 date: system-generated
 planning_artifacts: "{config_source}:planning_artifacts"
 implementation_artifacts: "{config_source}:implementation_artifacts"
+project_context: "**/project-context.md"
 
 installed_path: "{project-root}/_bmad/bmm/workflows/4-implementation/retrospective"
 template: false
@@ -51,5 +51,3 @@ input_file_patterns:
 
 # Required files
 sprint_status_file: "{implementation_artifacts}/sprint-status.yaml"
-story_directory: "{implementation_artifacts}"
-retrospectives_folder: "{implementation_artifacts}"