chore: remove unused profile image assets and ignore .claude directory

.gitignore

@@ -4,6 +4,7 @@
 # Python virtual environment
 /.venv/
 .agents/
+.claude/
 
 # Binary zip archives
 *.zip

backend/README.md

@@ -9,7 +9,7 @@ This module implements the standalone backend REST API server, SQLite database s
 ```
 +-------------------------------------------------------------+
 |                      SQLite (anl.db)                        |
-|   11 Relational Tables (Projects, Members, Pubs, Lectures)  |
+|   11 Relational Tables (fProjects, Members, Pubs, Lectures)  |
 +-------------------------------------------------------------+
                ▲                                ▲
                │ (cmd/seed)                     │ (SQL query)