P1b: SQLite project, content-addressed assets, autosave and undo

ui/src/lib/format.ts

@@ -33,6 +33,8 @@ export function commandLabel(command: Command): string {
     case 'strike_face': return `strike ${command.core} f${command.face + 1}`;
     case 'set_pattern_step': return `step ${command.row + 1}:${command.step + 1} at ${command.velocity}`;
     case 'set_pattern_face': return `${command.core} f${command.face + 1} on row ${command.row + 1}`;
+    case 'undo': return 'undo';
+    case 'redo': return 'redo';
     case 'get_snapshot': return 'snapshot';
   }
 }

ui/src/lib/types.ts

@@ -61,6 +61,9 @@ export interface Pattern {
 
 export interface State {
   revision: number;
+  project_name: string;
+  can_undo: boolean;
+  can_redo: boolean;
   transport: TransportState;
   veins: VeinState[];
   pattern: Pattern;
@@ -76,7 +79,8 @@ export type Event =
   | { kind: 'struck'; vein: VeinId; velocity: number }
   | { kind: 'pattern_step'; row: number; step: number; velocity: number }
   | { kind: 'pattern_face'; row: number; core: string; face: number }
-  | { kind: 'face_struck'; core: string; face: number; velocity: number };
+  | { kind: 'face_struck'; core: string; face: number; velocity: number }
+  | { kind: 'history'; can_undo: boolean; can_redo: boolean };
 
 export type Command =
   | { type: 'get_snapshot' }
@@ -87,7 +91,9 @@ export type Command =
   | { type: 'set_vein_gain'; vein: VeinId; gain: number }
   | { type: 'strike_face'; core: string; face: number; velocity: number }
   | { type: 'set_pattern_step'; row: number; step: number; velocity: number }
-  | { type: 'set_pattern_face'; row: number; core: string; face: number };
+  | { type: 'set_pattern_face'; row: number; core: string; face: number }
+  | { type: 'undo' }
+  | { type: 'redo' };
 
 export type CommandResult =
   | { kind: 'snapshot'; state: State }