feat: add snapshot database tables, live snapshot recording, and vi/emacs editing mode toggles

include/db.h

@@ -23,4 +23,15 @@ r_status_t db_load_conversation(db_handle db, const char *session_key, char **da
 long long db_get_conversation_age(db_handle db, const char *session_key);
 r_status_t db_delete_conversation(db_handle db, const char *session_key);
 
+r_status_t db_snapshot_create(db_handle db, const char *session_id, const char *description,
+                              const char **paths, const char **contents, int file_count,
+                              long long *snapshot_id_out);
+r_status_t db_snapshot_list(db_handle db, const char *session_id, struct json_object **result);
+r_status_t db_snapshot_get_files(db_handle db, long long snapshot_id, struct json_object **result);
+
+r_status_t db_snapshot_ensure_live(db_handle db, const char *session_id,
+                                   const char *description, long long *snapshot_id_out);
+r_status_t db_snapshot_upsert_file(db_handle db, long long snapshot_id,
+                                    const char *path, const char *content);
+
 #endif

include/messages.h

@@ -35,4 +35,6 @@ char *messages_to_string(messages_handle msgs);
 char *messages_to_json_string(messages_handle msgs);
 int messages_count(messages_handle msgs);
 
+char *messages_generate_session_id(void);
+
 #endif

include/r_config.h

@@ -36,4 +36,7 @@ int r_config_get_max_total_spawns(r_config_handle cfg);
 
 const char *r_config_get_deepsearch_system_message(void);
 
+void r_config_set_current_prompt(r_config_handle cfg, const char *prompt);
+const char *r_config_get_current_prompt(r_config_handle cfg);
+
 #endif

include/tool.h

@@ -48,4 +48,6 @@ typedef enum {
 
 tool_registry_t *tool_registry_get_specialized(tool_registry_type_t type);
 
+void snapshot_live_record(const char *path, const char *content);
+
 #endif