feat(sdk-android): snapshot property delegate + feature-scoped files + screen fix (#34)

* rename web to inspect ui

* feat(sdk-android): add camelToSnakeCase conversion

* feat(sdk-android): add snapshot() property delegate with tests

* feat(folio): add feature-scoped sanderling snapshot objects

* refactor(folio): slim FolioApplication to snapshot object references

* fix(folio): rename route snapshot to screen, update spec.ts

inspect-ui/src/types.ts

@@ -0,0 +1,127 @@
+export interface Meta {
+  seed: number;
+  spec_path: string;
+  bundle_sha256: string;
+  platform: string;
+  bundle_id: string;
+  started_at: string;
+  ended_at?: string;
+  sanderling_version: string;
+}
+
+export interface RunSummary {
+  id: string;
+  started_at: string;
+  ended_at?: string;
+  spec_path: string;
+  seed: number;
+  platform: string;
+  bundle_id: string;
+  duration_millis: number;
+  step_count: number;
+  violation_count: number;
+  in_progress: boolean;
+}
+
+export interface StepSummary {
+  index: number;
+  timestamp: string;
+  screen?: string;
+  action_kind?: string;
+  action_label?: string;
+  has_violations: boolean;
+  has_exceptions: boolean;
+}
+
+export interface Run extends RunSummary {
+  meta: Meta;
+  steps: StepSummary[];
+}
+
+export interface BoundsRect {
+  left: number;
+  top: number;
+  right: number;
+  bottom: number;
+}
+
+export interface HierarchyElement {
+  resourceId?: string;
+  text?: string;
+  description?: string;
+  class?: string;
+  package?: string;
+  clickable?: boolean;
+  enabled?: boolean;
+  checked?: boolean;
+  focused?: boolean;
+  selected?: boolean;
+  bounds: BoundsRect;
+}
+
+export interface Hierarchy {
+  elements: HierarchyElement[];
+}
+
+export interface BoundsRecord {
+  x: number;
+  y: number;
+  width: number;
+  height: number;
+}
+
+export interface PointRecord {
+  x: number;
+  y: number;
+}
+
+export interface Action {
+  kind: string;
+  x?: number;
+  y?: number;
+  from_x?: number;
+  from_y?: number;
+  to_x?: number;
+  to_y?: number;
+  key?: string;
+  text?: string;
+  duration_millis?: number;
+  selector?: string;
+  resolved_bounds?: BoundsRecord;
+  tap_point?: PointRecord;
+}
+
+export interface Exception {
+  class: string;
+  message?: string;
+  stack_trace?: string;
+  unix_millis?: number;
+}
+
+export type ResidualNode =
+  | { op: "true" }
+  | { op: "false" }
+  | { op: "always" | "now" | "next" | "not"; arg: ResidualNode }
+  | { op: "eventually"; arg: ResidualNode; within?: { amount: number; unit: string } }
+  | { op: "and" | "or" | "implies"; left: ResidualNode; right: ResidualNode }
+  | { op: "predicate"; name?: string }
+  | { op: "error"; message: string };
+
+export interface Metrics {
+  cpu_percent?: number;
+  heap_bytes?: number;
+  total_memory_bytes?: number;
+}
+
+export interface Step {
+  step: number;
+  timestamp: string;
+  screen?: string;
+  snapshots?: Record<string, unknown>;
+  action?: Action;
+  exceptions?: Exception[];
+  violations?: string[];
+  hierarchy?: Hierarchy;
+  residuals?: Record<string, ResidualNode>;
+  metrics?: Metrics;
+}