feat: init fitness-coach (backend + miniprogram)

- backend: NestJS service with exercise/plan data
- miniprogram: WeChat mini program client
- exclude node_modules, dist, runtime data-store, local env

backend/src/exercises/utils/normalize.ts

@@ -0,0 +1,86 @@
+import {
+  RawExercise,
+  Exercise,
+  ExerciseSummary,
+  ExerciseType,
+} from '../exercises.interface';
+import {
+  BODY_PART_LABELS,
+  EQUIPMENT_LABELS,
+  MUSCLE_LABELS,
+  labelOf,
+} from '../data/labels';
+
+const MEDIA_BASE_URL = (
+  process.env.MEDIA_BASE_URL || 'https://cdn.jsdelivr.net/gh/hasaneyldrm/exercises-dataset@main'
+).replace(/\/$/, '');
+
+function toMediaUrl(path: string): string {
+  if (!path) return '';
+  if (/^https?:\/\//.test(path)) return path;
+  return `${MEDIA_BASE_URL}/${path}`;
+}
+
+function deriveType(raw: RawExercise): ExerciseType {
+  if (raw.body_part === 'cardio') return 'cardio';
+  const hay = `${raw.name} ${raw.equipment} ${raw.category || ''}`.toLowerCase();
+  const flexKeywords = ['stretch', 'yoga', 'mobility', 'pilates', 'flexibility', 'foam roll'];
+  if (flexKeywords.some((k) => hay.includes(k))) return 'flexibility';
+  return 'strength';
+}
+
+const TYPE_LABELS: Record<ExerciseType, string> = {
+  strength: '力量',
+  cardio: '有氧',
+  flexibility: '柔韧',
+};
+
+export function normalize(raw: RawExercise): Exercise {
+  const type = deriveType(raw);
+  const zh = raw.instructions?.zh || '';
+  const en = raw.instructions?.en || '';
+  const zhSteps = raw.instruction_steps?.zh || [];
+  const enSteps = raw.instruction_steps?.en || [];
+
+  return {
+    id: raw.id,
+    name: raw.name,
+    bodyPart: raw.body_part,
+    bodyPartLabel: labelOf(BODY_PART_LABELS, raw.body_part),
+    equipment: raw.equipment,
+    equipmentLabel: labelOf(EQUIPMENT_LABELS, raw.equipment),
+    target: raw.target,
+    targetLabel: labelOf(MUSCLE_LABELS, raw.target),
+    muscleGroup: raw.muscle_group,
+    muscleGroupLabel: labelOf(MUSCLE_LABELS, raw.muscle_group),
+    secondaryMuscles: raw.secondary_muscles || [],
+    secondaryMusclesLabels: (raw.secondary_muscles || []).map(
+      (m) => labelOf(MUSCLE_LABELS, m),
+    ),
+    type,
+    typeLabel: TYPE_LABELS[type],
+    image: toMediaUrl(raw.image),
+    gifUrl: toMediaUrl(raw.gif_url),
+    instructions: { zh, en },
+    instructionSteps: { zh: zhSteps, en: enSteps },
+    attribution: raw.attribution,
+    mediaId: raw.media_id,
+  };
+}
+
+export function toSummary(ex: Exercise): ExerciseSummary {
+  return {
+    id: ex.id,
+    name: ex.name,
+    bodyPart: ex.bodyPart,
+    bodyPartLabel: ex.bodyPartLabel,
+    equipment: ex.equipment,
+    equipmentLabel: ex.equipmentLabel,
+    target: ex.target,
+    targetLabel: ex.targetLabel,
+    type: ex.type,
+    typeLabel: ex.typeLabel,
+    image: ex.image,
+    gifUrl: ex.gifUrl,
+  };
+}