tui: add domain types (Project, POU, Hunk, Selection)

src/tui/shared/types.ts

@@ -0,0 +1,52 @@
+export type POUKind =
+  | 'PRG'
+  | 'FB'
+  | 'GVL'
+  | 'STRUCT'
+  | 'ENUM'
+  | 'METHOD'
+  | 'PROPERTY_GETTER'
+  | 'PROPERTY_SETTER'
+  | 'META'
+  | 'OTHER';
+
+export interface POU {
+  /** Display name without .st extension */
+  name: string;
+  kind: POUKind;
+  /** Path relative to the device root, with forward slashes. */
+  relPath: string;
+  absPath: string;
+  /** Non-blank line count */
+  loc: number;
+  mtimeMs: number;
+}
+
+export interface Device {
+  /** Top-level subdir under mcp-mirror/, e.g. "CodesysRpi" */
+  name: string;
+  pous: POU[];
+}
+
+export interface Project {
+  /** The project's parent directory (the dir that contains mcp-mirror/) */
+  rootDir: string;
+  /** Mirror dir mtime — used for the "stale" indicator */
+  mirrorMtimeMs: number;
+  devices: Device[];
+}
+
+export interface Selection {
+  device: string;
+  pou: POU;
+  viewerLine: number;
+}
+
+export type HunkKind = 'add' | 'del' | 'ctx';
+
+export interface Hunk {
+  kind: HunkKind;
+  /** 1-based line number in the side this hunk belongs to (new-side for add/ctx, old-side for del). */
+  lineNo: number;
+  text: string;
+}