feat(core)!: introduce runtime extension registry and flat module conventions

BREAKING CHANGE: sup config now derives entries from package.json#exports and a server/client glob instead of manual lists; module structure follows flat + barrel convention with .server.js/.client.js runtime suffixes

src/features/init.js

@@ -1,41 +1,37 @@
 /**
  * Core Feature Database Initialization (CLI)
  *
- * Initializes and drops DB tables for each core feature.
- * Features are discovered from CORE_FEATURES — no manual wiring needed
- * when adding a new feature.
+ * Initialise et supprime les tables des features core. La liste est aujourd'hui
+ * limitée à auth — le seul feature avec un schéma. Ajouter ici si un autre
+ * feature gagne un db.js avec createTables()/dropTables().
  */
 
-import { CORE_FEATURES } from './features.registry.js';
+import { createTables as authCreate, dropTables as authDrop } from './auth/db.js';
 import { done, fail, info, step } from '@zen/core/shared/logger';
 
-/**
- * Initialize all core feature databases.
- * @returns {Promise<{ created: string[], skipped: string[] }>}
- */
+const FEATURES = [
+  { name: 'auth', createTables: authCreate, dropTables: authDrop },
+];
+
 export async function initFeatures() {
   const created = [];
   const skipped = [];
 
   step('Initializing feature databases...');
 
-  for (const featureName of CORE_FEATURES) {
+  for (const { name, createTables } of FEATURES) {
     try {
-      step(`Initializing ${featureName}...`);
-      const db = await import(`./${featureName}/db.js`);
-
-      if (typeof db.createTables === 'function') {
-        const result = await db.createTables();
-
-        if (result?.created) created.push(...result.created);
-        if (result?.skipped) skipped.push(...result.skipped);
-
-        done(`${featureName} initialized`);
-      } else {
-        info(`${featureName} has no createTables function`);
+      step(`Initializing ${name}...`);
+      if (typeof createTables !== 'function') {
+        info(`${name} has no createTables function`);
+        continue;
       }
+      const result = await createTables();
+      if (result?.created) created.push(...result.created);
+      if (result?.skipped) skipped.push(...result.skipped);
+      done(`${name} initialized`);
     } catch (error) {
-      fail(`${featureName}: ${error.message}`);
+      fail(`${name}: ${error.message}`);
       throw error;
     }
   }
@@ -43,22 +39,16 @@ export async function initFeatures() {
   return { created, skipped };
 }
 
-/**
- * Drop all core feature databases in reverse order.
- * @returns {Promise<void>}
- */
 export async function dropFeatures() {
-  for (const featureName of [...CORE_FEATURES].reverse()) {
+  for (const { name, dropTables } of [...FEATURES].reverse()) {
     try {
-      const db = await import(`./${featureName}/db.js`);
-
-      if (typeof db.dropTables === 'function') {
-        await db.dropTables();
-      } else {
-        info(`${featureName} has no dropTables function`);
+      if (typeof dropTables !== 'function') {
+        info(`${name} has no dropTables function`);
+        continue;
       }
+      await dropTables();
     } catch (error) {
-      fail(`${featureName}: ${error.message}`);
+      fail(`${name}: ${error.message}`);
       throw error;
     }
   }