feat(search): recherche intelligente — parsing backend + pg_trgm fuzzy

- parseSearchTokens() côté backend : extrait type (async/openapi),
  version (v1, 1.2.3) et latestOnly depuis la chaîne brute
- Recherche fuzzy via word_similarity (pg_trgm, seuil 0.5) + ILIKE
- latestOnly automatique quand champ non vide sans version explicite
- Suppression de parseSearch() dans BrowseComponent et CatalogComponent
- Suppression de version/latestOnly de ApiListQuery (géré par le backend)
- Activation de pg_trgm via CREATE EXTENSION dans SeederService
- Tests unitaires Vitest pour parseSearchTokens (24 cas)

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

back/src/modules/apis/apis.service.spec.ts

@@ -0,0 +1,156 @@
+import { describe, it, expect, beforeEach } from 'vitest';
+import { ApisService } from './apis.service';
+import { ApiType } from '@datacat/shared';
+
+/** Accès à la méthode privée pour les tests unitaires */
+function parse(raw: string) {
+  return (ApisService.prototype as any).parseSearchTokens.call({}, raw) as {
+    text: string;
+    type?: ApiType;
+    version?: string;
+    latestOnly: boolean;
+  };
+}
+
+describe('ApisService.parseSearchTokens()', () => {
+  describe('chaîne vide', () => {
+    it('retourne text vide, pas de type, pas de version, latestOnly=false', () => {
+      expect(parse('')).toEqual({ text: '', type: undefined, version: undefined, latestOnly: false });
+    });
+
+    it('gère les espaces seuls', () => {
+      expect(parse('   ')).toEqual({ text: '', type: undefined, version: undefined, latestOnly: false });
+    });
+  });
+
+  describe('texte libre seul (sans version ni type)', () => {
+    it('"auth" → latestOnly=true automatique', () => {
+      expect(parse('auth')).toEqual({ text: 'auth', type: undefined, version: undefined, latestOnly: true });
+    });
+
+    it('"paiement commande" → texte libre multi-mots, latestOnly=true', () => {
+      expect(parse('paiement commande')).toEqual({
+        text: 'paiement commande',
+        type: undefined,
+        version: undefined,
+        latestOnly: true,
+      });
+    });
+  });
+
+  describe('détection du type', () => {
+    it('"async" → ASYNCAPI', () => {
+      const r = parse('async');
+      expect(r.type).toBe('ASYNCAPI');
+    });
+
+    it('"asyncapi" → ASYNCAPI', () => {
+      expect(parse('asyncapi').type).toBe('ASYNCAPI');
+    });
+
+    it('"openapi" → OPENAPI', () => {
+      expect(parse('openapi').type).toBe('OPENAPI');
+    });
+
+    it('"open" → OPENAPI', () => {
+      expect(parse('open').type).toBe('OPENAPI');
+    });
+
+    it('type seul → latestOnly=true (champ non vide, pas de version)', () => {
+      expect(parse('async').latestOnly).toBe(true);
+    });
+
+    it('mots de type ne font pas partie du texte libre', () => {
+      expect(parse('auth async').text).toBe('auth');
+    });
+  });
+
+  describe('détection de version', () => {
+    it('"v1" → version="1", latestOnly=false', () => {
+      expect(parse('v1')).toEqual({ text: '', type: undefined, version: '1', latestOnly: false });
+    });
+
+    it('"1.2" → version="1.2"', () => {
+      expect(parse('1.2').version).toBe('1.2');
+    });
+
+    it('"v1.2.3" → version="1.2.3" (préfixe v supprimé)', () => {
+      expect(parse('v1.2.3').version).toBe('1.2.3');
+    });
+
+    it('"1.0.0" → version exacte', () => {
+      expect(parse('1.0.0').version).toBe('1.0.0');
+    });
+
+    it('version présente → latestOnly=false', () => {
+      expect(parse('auth v1').latestOnly).toBe(false);
+    });
+
+    it('numéro de version ne fait pas partie du texte libre', () => {
+      expect(parse('auth v1').text).toBe('auth');
+    });
+  });
+
+  describe('mot-clé "latest"', () => {
+    it('"latest" seul → latestOnly=true, pas de texte', () => {
+      expect(parse('latest')).toEqual({ text: '', type: undefined, version: undefined, latestOnly: true });
+    });
+
+    it('"latest" + type → latestOnly=true + type détecté', () => {
+      const r = parse('latest async');
+      expect(r.latestOnly).toBe(true);
+      expect(r.type).toBe('ASYNCAPI');
+    });
+
+    it('"latest" + version → les deux flags actifs', () => {
+      const r = parse('latest v1');
+      expect(r.latestOnly).toBe(true);
+      expect(r.version).toBe('1');
+    });
+  });
+
+  describe('combinaisons', () => {
+    it('"auth async" → texte=auth, type=ASYNCAPI, latestOnly=true', () => {
+      expect(parse('auth async')).toEqual({
+        text: 'auth',
+        type: 'ASYNCAPI',
+        version: undefined,
+        latestOnly: true,
+      });
+    });
+
+    it('"auth async v1" → texte=auth, type=ASYNCAPI, version=1, latestOnly=false', () => {
+      expect(parse('auth async v1')).toEqual({
+        text: 'auth',
+        type: 'ASYNCAPI',
+        version: '1',
+        latestOnly: false,
+      });
+    });
+
+    it('"auth 1.0.0" → texte=auth, version=1.0.0, latestOnly=false', () => {
+      expect(parse('auth 1.0.0')).toEqual({
+        text: 'auth',
+        type: undefined,
+        version: '1.0.0',
+        latestOnly: false,
+      });
+    });
+
+    it('"openapi latest" → type=OPENAPI, latestOnly=true', () => {
+      expect(parse('openapi latest')).toEqual({
+        text: '',
+        type: 'OPENAPI',
+        version: undefined,
+        latestOnly: true,
+      });
+    });
+
+    it('insensible à la casse pour les mots-clés', () => {
+      const r = parse('ASYNC Auth LATEST');
+      expect(r.type).toBe('ASYNCAPI');
+      expect(r.latestOnly).toBe(true);
+      expect(r.text).toBe('Auth');
+    });
+  });
+});