feat(blog): add file-based blog with dynamic slugs, MDX content and layout shell

- Introduced blog routing using Next.js App Router
- Implemented dynamic [slug] pages for blog posts
- Added MDX-based content loading via lib/posts
- Integrated shared TopBar layout with navigation
- Established clear content, lib and component separation

apps/public-web/node_modules/next/dist/build/preview-key-utils.js

@@ -0,0 +1,91 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+Object.defineProperty(exports, "generatePreviewKeys", {
+    enumerable: true,
+    get: function() {
+        return generatePreviewKeys;
+    }
+});
+const _path = /*#__PURE__*/ _interop_require_default(require("path"));
+const _fs = /*#__PURE__*/ _interop_require_default(require("fs"));
+const _crypto = /*#__PURE__*/ _interop_require_default(require("crypto"));
+const _cachedir = require("../server/cache-dir");
+function _interop_require_default(obj) {
+    return obj && obj.__esModule ? obj : {
+        default: obj
+    };
+}
+const CONFIG_FILE = '.previewinfo';
+const PREVIEW_ID = 'previewModeId';
+const PREVIEW_SIGNING_KEY = 'previewModeSigningKey';
+const PREVIEW_ENCRYPTION_KEY = 'previewModeEncryptionKey';
+const PREVIEW_EXPIRE_AT = 'expireAt';
+const EXPIRATION = 1000 * 60 * 60 * 24 * 14 // 14 days
+;
+async function writeCache(distDir, config) {
+    const cacheBaseDir = (0, _cachedir.getStorageDirectory)(distDir);
+    if (!cacheBaseDir) return;
+    const configPath = _path.default.join(cacheBaseDir, CONFIG_FILE);
+    if (!_fs.default.existsSync(cacheBaseDir)) {
+        await _fs.default.promises.mkdir(cacheBaseDir, {
+            recursive: true
+        });
+    }
+    await _fs.default.promises.writeFile(configPath, JSON.stringify({
+        [PREVIEW_ID]: config.previewModeId,
+        [PREVIEW_SIGNING_KEY]: config.previewModeSigningKey,
+        [PREVIEW_ENCRYPTION_KEY]: config.previewModeEncryptionKey,
+        [PREVIEW_EXPIRE_AT]: Date.now() + EXPIRATION
+    }));
+}
+function generateConfig() {
+    return {
+        previewModeId: _crypto.default.randomBytes(16).toString('hex'),
+        previewModeSigningKey: _crypto.default.randomBytes(32).toString('hex'),
+        previewModeEncryptionKey: _crypto.default.randomBytes(32).toString('hex')
+    };
+}
+async function generatePreviewKeys({ distDir, isBuild }) {
+    const cacheBaseDir = (0, _cachedir.getStorageDirectory)(distDir);
+    if (!cacheBaseDir) {
+        // There's no persistent storage available. We generate a new config.
+        // This also covers development time.
+        return generateConfig();
+    }
+    const configPath = _path.default.join(cacheBaseDir, CONFIG_FILE);
+    async function tryReadCachedConfig() {
+        if (!_fs.default.existsSync(configPath)) return false;
+        try {
+            const config = JSON.parse(await _fs.default.promises.readFile(configPath, 'utf8'));
+            if (!config) return false;
+            if (typeof config[PREVIEW_ID] !== 'string' || typeof config[PREVIEW_ENCRYPTION_KEY] !== 'string' || typeof config[PREVIEW_SIGNING_KEY] !== 'string' || typeof config[PREVIEW_EXPIRE_AT] !== 'number') {
+                return false;
+            }
+            // For build time, we need to rotate the key if it's expired. Otherwise
+            // (next start) we have to keep the key as it is so the runtime key matches
+            // the build time key.
+            if (isBuild && config[PREVIEW_EXPIRE_AT] < Date.now()) {
+                return false;
+            }
+            return {
+                previewModeId: config[PREVIEW_ID],
+                previewModeSigningKey: config[PREVIEW_SIGNING_KEY],
+                previewModeEncryptionKey: config[PREVIEW_ENCRYPTION_KEY]
+            };
+        } catch (e) {
+            // Broken config file. We should generate a new key and overwrite it.
+            return false;
+        }
+    }
+    const maybeValidConfig = await tryReadCachedConfig();
+    if (maybeValidConfig !== false) {
+        return maybeValidConfig;
+    }
+    const config = generateConfig();
+    await writeCache(distDir, config);
+    return config;
+}
+
+//# sourceMappingURL=preview-key-utils.js.map