feat: implement AI-powered Human-in-the-Loop Norm Builder interface and standard CRUD endpoints

App.tsx

@@ -10,7 +10,7 @@ import { ReportDisplay } from './components/ReportDisplay';
 import { PrintableReport } from './components/PrintableReport';
 import { DownloadIcon, EyeIcon, CogIcon } from './components/Icons';
 import { ApiKeySetup } from './components/ApiKeySetup';
-import { AdminCategories } from './components/AdminCategories';
+import { AdminPanel } from './components/AdminPanel';
 
 const App: React.FC = () => {
   const [viewMode, setViewMode] = useState<'analysis' | 'admin'>('analysis');
@@ -219,7 +219,12 @@ const App: React.FC = () => {
             <span className="w-10 h-10 border-4 border-blue-500 border-t-transparent rounded-full animate-spin"></span>
           </div>
         ) : viewMode === 'admin' ? (
-          <AdminCategories />
+          <AdminPanel 
+            provider={provider} 
+            apiKey={apiKey} 
+            model={model} 
+            endpoint={endpoint} 
+          />
         ) : (!hasKey || showSetup) ? (
           <ApiKeySetup onKeySave={handleKeySave} onCancel={hasKey ? () => setShowSetup(false) : undefined} />
         ) : !reportsData ? (

components/AdminPanel.tsx

@@ -0,0 +1,47 @@
+import React, { useState } from 'react';
+import { AdminCategories } from './AdminCategories';
+import { AdminStandards } from './AdminStandards';
+import type { AIProvider } from '../types/providers';
+
+interface AdminPanelProps {
+  apiKey: string;
+  provider: AIProvider;
+  model: string;
+  endpoint?: string;
+}
+
+export const AdminPanel: React.FC<AdminPanelProps> = (props) => {
+  const [activeTab, setActiveTab] = useState<'categories' | 'standards'>('categories');
+
+  return (
+    <div className="max-w-6xl mx-auto p-4 sm:p-6 lg:p-8 animate-fade-in">
+      <div className="mb-8 border-b border-slate-200 dark:border-slate-700">
+        <div className="flex gap-8">
+          <button
+            onClick={() => setActiveTab('categories')}
+            className={`pb-4 text-sm font-bold transition-all border-b-2 ${
+              activeTab === 'categories'
+                ? 'border-indigo-500 text-indigo-600 dark:text-indigo-400'
+                : 'border-transparent text-slate-500 hover:text-slate-700 dark:text-slate-400 dark:hover:text-slate-300'
+            }`}
+          >
+            1. Categorias Base
+          </button>
+          <button
+            onClick={() => setActiveTab('standards')}
+            className={`pb-4 text-sm font-bold transition-all border-b-2 flex items-center gap-2 ${
+              activeTab === 'standards'
+                ? 'border-indigo-500 text-indigo-600 dark:text-indigo-400'
+                : 'border-transparent text-slate-500 hover:text-slate-700 dark:text-slate-400 dark:hover:text-slate-300'
+            }`}
+          >
+            2. Construtor de Normas IA
+            <span className="bg-indigo-100 text-indigo-800 dark:bg-indigo-900 dark:text-indigo-200 text-[10px] px-2 py-0.5 rounded-full">Beta</span>
+          </button>
+        </div>
+      </div>
+
+      {activeTab === 'categories' ? <AdminCategories /> : <AdminStandards {...props} />}
+    </div>
+  );
+};

components/AdminStandards.tsx

@@ -0,0 +1,228 @@
+import React, { useState, useEffect } from 'react';
+import type { Category } from './AdminCategories';
+import { buildStandardWithAI } from '../services/aiService';
+import type { AIProvider } from '../types/providers';
+
+interface AdminStandardsProps {
+  apiKey: string;
+  provider: AIProvider;
+  model: string;
+  endpoint?: string;
+}
+
+export const AdminStandards: React.FC<AdminStandardsProps> = ({ apiKey, provider, model, endpoint }) => {
+  const [categories, setCategories] = useState<Category[]>([]);
+  const [selectedCategory, setSelectedCategory] = useState<string>('');
+  const [standards, setStandards] = useState<any[]>([]);
+  const [isLoadingCats, setIsLoadingCats] = useState(true);
+  
+  const [isGenerating, setIsGenerating] = useState(false);
+  const [standardName, setStandardName] = useState('');
+  const [generatedJson, setGeneratedJson] = useState('');
+  const [jsonError, setJsonError] = useState<string | null>(null);
+
+  useEffect(() => {
+    fetchCategories();
+  }, []);
+
+  useEffect(() => {
+    if (selectedCategory) {
+      fetchStandards(selectedCategory);
+    } else {
+      setStandards([]);
+    }
+  }, [selectedCategory]);
+
+  const fetchCategories = async () => {
+    try {
+      const res = await fetch('/api/categories');
+      const data = await res.json();
+      setCategories(data);
+      if (data.length > 0) setSelectedCategory(data[0].id);
+    } catch (e) {
+      console.error(e);
+    } finally {
+      setIsLoadingCats(false);
+    }
+  };
+
+  const fetchStandards = async (catId: string) => {
+    try {
+      const res = await fetch(`/api/standards?categoryId=${catId}`);
+      const data = await res.json();
+      setStandards(data);
+    } catch (e) {
+      console.error(e);
+    }
+  };
+
+  const handleGenerate = async () => {
+    if (!standardName || !selectedCategory) return;
+    
+    const cat = categories.find(c => c.id === selectedCategory);
+    if (!cat) return;
+
+    setIsGenerating(true);
+    setJsonError(null);
+    try {
+      const jsonObj = await buildStandardWithAI(
+        { provider, apiKey, model, endpoint },
+        standardName,
+        cat.description
+      );
+      setGeneratedJson(JSON.stringify(jsonObj, null, 2));
+    } catch (e: any) {
+      setJsonError(e.message || "Erro ao gerar a norma.");
+    } finally {
+      setIsGenerating(false);
+    }
+  };
+
+  const handleSave = async () => {
+    if (!generatedJson) return;
+    
+    try {
+      const parsed = JSON.parse(generatedJson);
+      parsed.categoria_id = selectedCategory;
+
+      await fetch('/api/standards', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(parsed)
+      });
+      
+      setGeneratedJson('');
+      setStandardName('');
+      fetchStandards(selectedCategory);
+    } catch (e) {
+      setJsonError("Erro ao salvar: JSON inválido ou falha na rede.");
+    }
+  };
+
+  const handleDelete = async (id: string) => {
+    if (!confirm('Excluir esta norma? O app não poderá mais validar relatórios contra ela.')) return;
+    try {
+      await fetch(`/api/standards?id=${id}`, { method: 'DELETE' });
+      fetchStandards(selectedCategory);
+    } catch (e) {
+      console.error(e);
+    }
+  };
+
+  if (isLoadingCats) return <div className="p-8 text-center">Carregando categorias...</div>;
+
+  return (
+    <div className="animate-fade-in space-y-8">
+      {/* Selector */}
+      <div className="bg-white dark:bg-slate-800 rounded-xl shadow-sm border border-slate-200 dark:border-slate-700 p-5">
+        <label className="block text-sm font-medium text-slate-700 dark:text-slate-300 mb-2">Selecione a Categoria de Material</label>
+        <select 
+          value={selectedCategory} 
+          onChange={e => setSelectedCategory(e.target.value)}
+          className="w-full rounded-lg border-slate-300 dark:border-slate-600 bg-white dark:bg-slate-700 px-4 py-2 text-slate-900 dark:text-white"
+        >
+          {categories.map(c => <option key={c.id} value={c.id}>{c.name}</option>)}
+        </select>
+      </div>
+
+      {selectedCategory && (
+        <div className="grid grid-cols-1 lg:grid-cols-2 gap-8">
+          
+          {/* Builder */}
+          <div className="bg-gradient-to-br from-indigo-50 to-blue-50 dark:from-slate-800 dark:to-slate-900 rounded-xl shadow-sm border border-indigo-100 dark:border-slate-700 p-5">
+            <h3 className="text-lg font-bold text-indigo-900 dark:text-indigo-300 mb-4 flex items-center gap-2">
+              <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13 10V3L4 14h7v7l9-11h-7z" /></svg>
+              Construtor Assistido por IA
+            </h3>
+            
+            <div className="space-y-4">
+              <div>
+                <label className="block text-sm font-medium text-slate-700 dark:text-slate-300 mb-1">Nome exato da Norma</label>
+                <input 
+                  type="text" 
+                  value={standardName}
+                  onChange={e => setStandardName(e.target.value)}
+                  placeholder="Ex: ASTM A572 Grau 50"
+                  className="w-full rounded-lg border-slate-300 dark:border-slate-600 bg-white dark:bg-slate-700 px-4 py-2 text-slate-900 dark:text-white outline-none focus:ring-2 focus:ring-indigo-500"
+                />
+              </div>
+
+              <button 
+                onClick={handleGenerate}
+                disabled={isGenerating || !standardName || !apiKey}
+                className="w-full bg-indigo-600 hover:bg-indigo-700 disabled:opacity-50 text-white font-bold py-2.5 rounded-lg transition-all"
+              >
+                {isGenerating ? 'Analisando e Extraindo Limites...' : 'Gerar Estrutura com IA'}
+              </button>
+
+              {!apiKey && (
+                <p className="text-red-500 text-xs">Configure a Chave da API no painel inicial primeiro.</p>
+              )}
+
+              {jsonError && (
+                <div className="p-3 bg-red-100 text-red-700 rounded-lg text-sm">{jsonError}</div>
+              )}
+
+              {generatedJson && (
+                <div className="mt-6 animate-fade-in">
+                  <label className="block text-sm font-medium text-slate-700 dark:text-slate-300 mb-1 flex justify-between">
+                    <span>Valide e corrija os parâmetros abaixo:</span>
+                    <span className="text-xs bg-yellow-100 text-yellow-800 px-2 py-0.5 rounded">Human-in-the-Loop</span>
+                  </label>
+                  <textarea
+                    value={generatedJson}
+                    onChange={e => setGeneratedJson(e.target.value)}
+                    className="w-full h-80 font-mono text-sm rounded-lg border-slate-300 dark:border-slate-600 bg-slate-50 dark:bg-slate-950 p-4 text-slate-800 dark:text-slate-300 outline-none focus:ring-2 focus:ring-indigo-500"
+                  />
+                  <button 
+                    onClick={handleSave}
+                    className="mt-4 w-full bg-emerald-600 hover:bg-emerald-700 text-white font-bold py-3 rounded-lg transition-all flex justify-center items-center gap-2"
+                  >
+                    <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M5 13l4 4L19 7" /></svg>
+                    Validar e Salvar Norma na Base
+                  </button>
+                </div>
+              )}
+            </div>
+          </div>
+
+          {/* List */}
+          <div className="bg-white dark:bg-slate-800 rounded-xl shadow-sm border border-slate-200 dark:border-slate-700 p-5">
+            <h3 className="text-lg font-bold text-slate-800 dark:text-slate-200 mb-4">Normas Ativas</h3>
+            
+            <div className="space-y-3">
+              {standards.length === 0 ? (
+                <p className="text-sm text-slate-500">Nenhuma norma cadastrada nesta categoria ainda.</p>
+              ) : (
+                standards.map(s => (
+                  <div key={s.id} className="p-4 rounded-lg border border-slate-200 dark:border-slate-700 bg-slate-50 dark:bg-slate-800/50 flex justify-between items-start">
+                    <div>
+                      <h4 className="font-bold text-slate-800 dark:text-white">{s.codigo}</h4>
+                      <p className="text-xs text-slate-500 dark:text-slate-400 mt-1">{s.produto_especifico}</p>
+                      
+                      <div className="mt-3 flex flex-wrap gap-2">
+                        {Object.keys(s.parametros_controle || {}).map(grupo => (
+                          <span key={grupo} className="text-[10px] uppercase font-bold bg-slate-200 dark:bg-slate-700 text-slate-600 dark:text-slate-300 px-2 py-1 rounded">
+                            {grupo}: {Object.keys(s.parametros_controle[grupo] || {}).length} specs
+                          </span>
+                        ))}
+                      </div>
+                    </div>
+                    <button 
+                      onClick={() => handleDelete(s.id)}
+                      className="text-red-500 hover:text-red-700 p-2"
+                      title="Excluir"
+                    >
+                      <svg className="w-4 h-4" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" /></svg>
+                    </button>
+                  </div>
+                ))
+              )}
+            </div>
+          </div>
+
+        </div>
+      )}
+    </div>
+  );
+};

server.js

@@ -137,6 +137,87 @@ const server = http.createServer((req, res) => {
   }
   // --- END CATEGORIES CRUD ---
 
+  // --- STANDARDS CRUD ---
+  const STANDARDS_FILE = path.join(CONFIG_DIR, 'standards.json');
+  const readStandards = () => {
+    if (fs.existsSync(STANDARDS_FILE)) {
+      try { return JSON.parse(fs.readFileSync(STANDARDS_FILE, 'utf-8')); } catch (e) {}
+    }
+    return [];
+  };
+
+  if (pathname === '/api/standards') {
+    if (req.method === 'GET') {
+      res.writeHead(200, { 'Content-Type': 'application/json' });
+      const allStandards = readStandards();
+      const catId = parsedUrl.searchParams.get('categoryId');
+      if (catId) {
+        res.end(JSON.stringify(allStandards.filter(s => s.categoria_id === catId)));
+      } else {
+        res.end(JSON.stringify(allStandards));
+      }
+      return;
+    }
+    
+    if (req.method === 'POST' || req.method === 'PUT') {
+      let body = '';
+      req.on('data', chunk => body += chunk.toString());
+      req.on('end', () => {
+        try {
+          const standard = JSON.parse(body);
+          
+          // Sanitização numérica para parametros_controle
+          if (standard.parametros_controle) {
+            for (const key of Object.keys(standard.parametros_controle)) {
+               const grupo = standard.parametros_controle[key];
+               if (typeof grupo === 'object' && grupo !== null) {
+                  for (const prop of Object.keys(grupo)) {
+                     const val = grupo[prop];
+                     if (val !== null && val !== undefined && val !== '') {
+                        const num = parseFloat(val);
+                        if (!isNaN(num)) {
+                           grupo[prop] = num;
+                        }
+                     }
+                  }
+               }
+            }
+          }
+
+          let standards = readStandards();
+          if (req.method === 'POST') {
+            standard.id = Date.now().toString();
+            standards.push(standard);
+          } else {
+            const index = standards.findIndex(s => s.id === standard.id);
+            if (index !== -1) standards[index] = { ...standards[index], ...standard };
+          }
+          fs.writeFileSync(STANDARDS_FILE, JSON.stringify(standards, null, 2));
+          res.writeHead(200, { 'Content-Type': 'application/json' });
+          res.end(JSON.stringify(standard));
+        } catch (err) {
+          res.writeHead(400); res.end(JSON.stringify({ error: 'Invalid payload' }));
+        }
+      });
+      return;
+    }
+
+    if (req.method === 'DELETE') {
+      const id = parsedUrl.searchParams.get('id');
+      if (id) {
+        let standards = readStandards();
+        standards = standards.filter(s => s.id !== id);
+        fs.writeFileSync(STANDARDS_FILE, JSON.stringify(standards, null, 2));
+        res.writeHead(200, { 'Content-Type': 'application/json' });
+        res.end(JSON.stringify({ success: true }));
+      } else {
+        res.writeHead(400); res.end(JSON.stringify({ error: 'Missing id' }));
+      }
+      return;
+    }
+  }
+  // --- END STANDARDS CRUD ---
+
   // Serve static files
   let filePath = path.join(DIST_DIR, req.url === '/' ? 'index.html' : req.url);
   

services/aiService.ts

@@ -597,4 +597,88 @@ export const analyzeWithMinimax = async (file: File, apiKey: string, model: stri
   }
 
   return cleanAndParseJson(content) as ReportData[];
+};
+
+export const buildStandardWithAI = async (
+  options: { provider: AIProvider; apiKey: string; model: string; endpoint?: string },
+  standardName: string,
+  categoryDescription: string
+) => {
+  const prompt = `Você é um engenheiro de materiais sênior. O usuário solicitou a criação de uma tabela de limites para a norma técnica: "${standardName}".
+A categoria deste material é descrita como: "${categoryDescription}".
+
+Sua tarefa é acessar seu conhecimento sobre esta norma e gerar os limites estritos (mínimos e máximos) exigidos.
+
+RESPONDA APENAS UM JSON VÁLIDO no seguinte formato EXATO:
+{
+  "codigo": "Nome oficial da norma (ex: ASTM A36/A36M-19)",
+  "produto_especifico": "Descreva o tipo de produto que essa norma cobre",
+  "parametros_controle": {
+    "mecanicos": {
+      "nome_do_parametro_1": valor_numerico,
+      "nome_do_parametro_2": valor_numerico
+    },
+    "quimicos": {
+      "nome_do_parametro": valor_numerico
+    },
+    "fisicos": {
+      "nome_do_parametro": valor_numerico
+    }
+  }
+}
+
+Regras Cruciais:
+1. USE APENAS NÚMEROS (floats/ints) nos valores. NUNCA use strings como "0.25" ou "250". Use 0.25 e 250.
+2. Se a norma não especifica um limite máximo ou mínimo para um elemento, coloque null (sem aspas).
+3. O nome da chave dentro de mecânicos/químicos/físicos deve ser em minúsculo, sem acentos, com underscores, e deve conter a unidade ou a palavra min/max (ex: "limite_escoamento_min_mpa", "carbono_max_percentual", "espessura_min_microns").
+4. Crie APENAS os grupos (mecanicos, quimicos, fisicos) que fazem sentido para a norma solicitada.
+5. DEVOLVA APENAS O JSON, sem nenhuma formatação ou texto explicativo ao redor.`;
+
+  try {
+    let resultJson = '';
+
+    if (options.provider === 'gemini') {
+      const ai = new GoogleGenAI({ apiKey: options.apiKey });
+      const response = await ai.models.generateContent({
+        model: options.model || 'gemini-2.5-flash',
+        contents: prompt
+      });
+      resultJson = response.text || '';
+    } else if (options.provider === 'openai') {
+      const response = await fetch('https://api.openai.com/v1/chat/completions', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': `Bearer ${options.apiKey}`
+        },
+        body: JSON.stringify({
+          model: options.model || 'gpt-4o',
+          messages: [{ role: "user", content: prompt }]
+        })
+      });
+      const data = await response.json();
+      resultJson = data.choices[0].message.content;
+    } else if (options.provider === 'openrouter') {
+      const response = await fetch('https://openrouter.ai/api/v1/chat/completions', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': `Bearer ${options.apiKey}`,
+          'HTTP-Referer': 'https://steelcheck.reifonas.cloud'
+        },
+        body: JSON.stringify({
+          model: options.model || 'google/gemini-2.5-flash',
+          messages: [{ role: "user", content: prompt }]
+        })
+      });
+      const data = await response.json();
+      resultJson = data.choices[0].message.content;
+    }
+
+    const parsed = cleanAndParseJson(resultJson);
+    return parsed;
+  } catch (error) {
+    console.error("Erro no buildStandardWithAI:", error);
+    throw new Error("Falha ao gerar norma com a IA. Tente novamente.");
+  }
 };