perf(registratura): lightweight API mode strips base64 attachments from list

ROOT CAUSE: RegistryEntry stores file attachments as base64 strings in JSON.
A single 5MB PDF becomes ~6.7MB of base64. With 6 entries, the exportAll()
endpoint was sending 30-60MB of JSON on every page load  taking 2+ minutes.

Fix: Added ?lightweight=true parameter to /api/storage GET endpoint.
When enabled, stripHeavyFields() recursively removes large 'data' and
'fileData' string fields (>1KB) from JSON values, replacing with '__stripped__'.

Changes:
- /api/storage route.ts: stripHeavyFields() + lightweight query param
- StorageService.export(): accepts { lightweight?: boolean } option
- DatabaseStorageAdapter.export(): passes lightweight flag to API
- LocalStorageAdapter.export(): accepts option (no-op, localStorage is fast)
- useStorage.exportAll(): passes options through
- registry-service.ts: getAllEntries() uses lightweight=true by default
- registry-service.ts: new getFullEntry() loads single entry with full data
- use-registry.ts: exports loadFullEntry() for on-demand full loading
- registratura-module.tsx: handleEdit/handleNavigateEntry load full entry

Result: List loading transfers ~100KB instead of 30-60MB. Editing loads
full data for a single entry on demand (~5-10MB for one entry vs all).

src/app/api/storage/route.ts

@@ -1,10 +1,40 @@
 import { NextRequest, NextResponse } from "next/server";
 import { prisma } from "@/core/storage/prisma";
 
+/**
+ * Strip heavy base64 data from JSON values to enable fast list loading.
+ * Targets: attachments[].data, versions[].fileData, and any top-level `data`
+ * field that looks like base64 (>1KB). Replaces with "__stripped__" marker.
+ */
+function stripHeavyFields(value: unknown): unknown {
+  if (!value || typeof value !== "object") return value;
+  if (Array.isArray(value)) return value.map(stripHeavyFields);
+
+  const obj = value as Record<string, unknown>;
+  const result: Record<string, unknown> = {};
+
+  for (const [k, v] of Object.entries(obj)) {
+    if (k === "data" && typeof v === "string" && v.length > 1024) {
+      // Strip large base64 data fields, keep a marker
+      result[k] = "__stripped__";
+    } else if (k === "fileData" && typeof v === "string" && v.length > 1024) {
+      result[k] = "__stripped__";
+    } else if (Array.isArray(v)) {
+      result[k] = v.map(stripHeavyFields);
+    } else if (v && typeof v === "object") {
+      result[k] = stripHeavyFields(v);
+    } else {
+      result[k] = v;
+    }
+  }
+  return result;
+}
+
 export async function GET(request: NextRequest) {
   const searchParams = request.nextUrl.searchParams;
   const namespace = searchParams.get("namespace");
   const key = searchParams.get("key");
+  const lightweight = searchParams.get("lightweight") === "true";
 
   if (!namespace) {
     return NextResponse.json(
@@ -34,8 +64,12 @@ export async function GET(request: NextRequest) {
       // Return as a record { [key]: value }
       const result: Record<string, any> = {};
       for (const item of items) {
+        if (lightweight) {
+          result[item.key] = stripHeavyFields(item.value);
+        } else {
           result[item.key] = item.value;
         }
+      }
       return NextResponse.json({ items: result });
     }
   } catch (error) {

src/core/storage/adapters/database-adapter.ts

@@ -82,11 +82,16 @@ export class DatabaseStorageAdapter implements StorageService {
     }
   }
 
-  async export(namespace: string): Promise<Record<string, unknown>> {
+  async export(
+    namespace: string,
+    options?: { lightweight?: boolean },
+  ): Promise<Record<string, unknown>> {
     try {
-      const res = await fetch(
-        `/api/storage?namespace=${encodeURIComponent(namespace)}`,
-      );
+      let url = `/api/storage?namespace=${encodeURIComponent(namespace)}`;
+      if (options?.lightweight) {
+        url += "&lightweight=true";
+      }
+      const res = await fetch(url);
       if (!res.ok) return {};
       const data = await res.json();
       return data.items || {};

src/core/storage/adapters/local-storage.ts

@@ -1,4 +1,4 @@
-import type { StorageService } from '../types';
+import type { StorageService } from "../types";
 
 function nsKey(namespace: string, key: string): string {
   return `architools:${namespace}:${key}`;
@@ -10,7 +10,7 @@ function nsPrefix(namespace: string): string {
 
 export class LocalStorageAdapter implements StorageService {
   async get<T>(namespace: string, key: string): Promise<T | null> {
-    if (typeof window === 'undefined') return null;
+    if (typeof window === "undefined") return null;
     try {
       const raw = window.localStorage.getItem(nsKey(namespace, key));
       if (raw === null) return null;
@@ -21,17 +21,17 @@ export class LocalStorageAdapter implements StorageService {
   }
 
   async set<T>(namespace: string, key: string, value: T): Promise<void> {
-    if (typeof window === 'undefined') return;
+    if (typeof window === "undefined") return;
     window.localStorage.setItem(nsKey(namespace, key), JSON.stringify(value));
   }
 
   async delete(namespace: string, key: string): Promise<void> {
-    if (typeof window === 'undefined') return;
+    if (typeof window === "undefined") return;
     window.localStorage.removeItem(nsKey(namespace, key));
   }
 
   async list(namespace: string): Promise<string[]> {
-    if (typeof window === 'undefined') return [];
+    if (typeof window === "undefined") return [];
     const prefix = nsPrefix(namespace);
     const keys: string[] = [];
     for (let i = 0; i < window.localStorage.length; i++) {
@@ -43,7 +43,10 @@ export class LocalStorageAdapter implements StorageService {
     return keys;
   }
 
-  async query<T>(namespace: string, predicate: (item: T) => boolean): Promise<T[]> {
+  async query<T>(
+    namespace: string,
+    predicate: (item: T) => boolean,
+  ): Promise<T[]> {
     const keys = await this.list(namespace);
     const results: T[] = [];
     for (const key of keys) {
@@ -56,14 +59,17 @@ export class LocalStorageAdapter implements StorageService {
   }
 
   async clear(namespace: string): Promise<void> {
-    if (typeof window === 'undefined') return;
+    if (typeof window === "undefined") return;
     const keys = await this.list(namespace);
     for (const key of keys) {
       window.localStorage.removeItem(nsKey(namespace, key));
     }
   }
 
-  async export(namespace: string): Promise<Record<string, unknown>> {
+  async export(
+    namespace: string,
+    _options?: { lightweight?: boolean },
+  ): Promise<Record<string, unknown>> {
     const keys = await this.list(namespace);
     const data: Record<string, unknown> = {};
     for (const key of keys) {
@@ -72,7 +78,10 @@ export class LocalStorageAdapter implements StorageService {
     return data;
   }
 
-  async import(namespace: string, data: Record<string, unknown>): Promise<void> {
+  async import(
+    namespace: string,
+    data: Record<string, unknown>,
+  ): Promise<void> {
     for (const [key, value] of Object.entries(data)) {
       await this.set(namespace, key, value);
     }

src/core/storage/types.ts

@@ -5,6 +5,9 @@ export interface StorageService {
   list(namespace: string): Promise<string[]>;
   query<T>(namespace: string, predicate: (item: T) => boolean): Promise<T[]>;
   clear(namespace: string): Promise<void>;
-  export(namespace: string): Promise<Record<string, unknown>>;
+  export(
+    namespace: string,
+    options?: { lightweight?: boolean },
+  ): Promise<Record<string, unknown>>;
   import(namespace: string, data: Record<string, unknown>): Promise<void>;
 }

src/core/storage/use-storage.ts

@@ -1,7 +1,7 @@
-'use client';
+"use client";
 
-import { useCallback, useMemo } from 'react';
-import { useStorageService } from './storage-provider';
+import { useCallback, useMemo } from "react";
+import { useStorageService } from "./storage-provider";
 
 export interface NamespacedStorage {
   get: <T>(key: string) => Promise<T | null>;
@@ -10,7 +10,9 @@ export interface NamespacedStorage {
   list: () => Promise<string[]>;
   query: <T>(predicate: (item: T) => boolean) => Promise<T[]>;
   clear: () => Promise<void>;
-  exportAll: () => Promise<Record<string, unknown>>;
+  exportAll: (options?: {
+    lightweight?: boolean;
+  }) => Promise<Record<string, unknown>>;
   importAll: (data: Record<string, unknown>) => Promise<void>;
 }
 
@@ -18,38 +20,45 @@ export function useStorage(namespace: string): NamespacedStorage {
   const service = useStorageService();
 
   const get = useCallback(
-    <T,>(key: string) => service.get<T>(namespace, key),
-    [service, namespace]
+    <T>(key: string) => service.get<T>(namespace, key),
+    [service, namespace],
   );
 
   const set = useCallback(
-    <T,>(key: string, value: T) => service.set<T>(namespace, key, value),
-    [service, namespace]
+    <T>(key: string, value: T) => service.set<T>(namespace, key, value),
+    [service, namespace],
   );
 
   const del = useCallback(
     (key: string) => service.delete(namespace, key),
-    [service, namespace]
+    [service, namespace],
   );
 
   const list = useCallback(() => service.list(namespace), [service, namespace]);
 
   const query = useCallback(
-    <T,>(predicate: (item: T) => boolean) => service.query<T>(namespace, predicate),
-    [service, namespace]
+    <T>(predicate: (item: T) => boolean) =>
+      service.query<T>(namespace, predicate),
+    [service, namespace],
   );
 
-  const clear = useCallback(() => service.clear(namespace), [service, namespace]);
+  const clear = useCallback(
+    () => service.clear(namespace),
+    [service, namespace],
+  );
 
-  const exportAll = useCallback(() => service.export(namespace), [service, namespace]);
+  const exportAll = useCallback(
+    (options?: { lightweight?: boolean }) => service.export(namespace, options),
+    [service, namespace],
+  );
 
   const importAll = useCallback(
     (data: Record<string, unknown>) => service.import(namespace, data),
-    [service, namespace]
+    [service, namespace],
   );
 
   return useMemo(
     () => ({ get, set, delete: del, list, query, clear, exportAll, importAll }),
-    [get, set, del, list, query, clear, exportAll, importAll]
+    [get, set, del, list, query, clear, exportAll, importAll],
   );
 }

src/modules/registratura/components/registratura-module.tsx

@@ -49,6 +49,7 @@ export function RegistraturaModule() {
     updateEntry,
     removeEntry,
     closeEntry,
+    loadFullEntry,
     addDeadline,
     resolveDeadline,
     removeDeadline,
@@ -120,13 +121,16 @@ export function RegistraturaModule() {
     setViewMode("list");
   };
 
-  const handleEdit = (entry: RegistryEntry) => {
-    setEditingEntry(entry);
+  const handleEdit = async (entry: RegistryEntry) => {
+    // Load full entry with attachment data (list mode strips base64)
+    const full = await loadFullEntry(entry.id);
+    setEditingEntry(full ?? entry);
     setViewMode("edit");
   };
 
-  const handleNavigateEntry = (entry: RegistryEntry) => {
-    setEditingEntry(entry);
+  const handleNavigateEntry = async (entry: RegistryEntry) => {
+    const full = await loadFullEntry(entry.id);
+    setEditingEntry(full ?? entry);
     setViewMode("edit");
   };
 

src/modules/registratura/hooks/use-registry.ts

@@ -13,6 +13,7 @@ import type {
 } from "../types";
 import {
   getAllEntries,
+  getFullEntry,
   saveEntry,
   deleteEntry,
   generateRegistryNumber,
@@ -255,6 +256,17 @@ export function useRegistry() {
     return true;
   });
 
+  /**
+   * Load a single entry WITH full attachment data (for editing).
+   * The list uses lightweight mode that strips base64 data.
+   */
+  const loadFullEntry = useCallback(
+    async (id: string): Promise<RegistryEntry | null> => {
+      return getFullEntry(storage, id);
+    },
+    [storage],
+  );
+
   return {
     entries: filteredEntries,
     allEntries: entries,
@@ -265,6 +277,7 @@ export function useRegistry() {
     updateEntry,
     removeEntry,
     closeEntry,
+    loadFullEntry,
     addDeadline,
     resolveDeadline,
     removeDeadline,

src/modules/registratura/services/registry-service.ts

@@ -8,18 +8,20 @@ export interface RegistryStorage {
   set<T>(key: string, value: T): Promise<void>;
   delete(key: string): Promise<void>;
   list(): Promise<string[]>;
-  exportAll(): Promise<Record<string, unknown>>;
+  exportAll(options?: {
+    lightweight?: boolean;
+  }): Promise<Record<string, unknown>>;
 }
 
 /**
- * Load all registry entries in a SINGLE request.
- * Uses exportAll() which fetches namespace data in one HTTP call,
- * avoiding the N+1 pattern (list keys → get each one individually).
+ * Load all registry entries in a SINGLE lightweight request.
+ * Uses exportAll({ lightweight: true }) which strips base64 attachment data
+ * server-side, reducing payload from potentially 30-60MB to <100KB.
  */
 export async function getAllEntries(
   storage: RegistryStorage,
 ): Promise<RegistryEntry[]> {
-  const all = await storage.exportAll();
+  const all = await storage.exportAll({ lightweight: true });
   const entries: RegistryEntry[] = [];
   for (const [key, value] of Object.entries(all)) {
     if (key.startsWith(STORAGE_PREFIX) && value) {
@@ -30,6 +32,16 @@ export async function getAllEntries(
   return entries;
 }
 
+/**
+ * Load a single full entry (with attachment data) for editing.
+ */
+export async function getFullEntry(
+  storage: RegistryStorage,
+  id: string,
+): Promise<RegistryEntry | null> {
+  return storage.get<RegistryEntry>(`${STORAGE_PREFIX}${id}`);
+}
+
 export async function saveEntry(
   storage: RegistryStorage,
   entry: RegistryEntry,