fix: one app.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/settings.local.json

@@ -1,7 +1,19 @@
 {
   "permissions": {
     "allow": [
-      "Bash(dotnet:*)"
+      "Bash(dotnet:*)",
+      "Bash(./yt-dlp.exe:*)",
+      "Bash(ffmpeg -version)",
+      "Bash(curl -s http://localhost:5000/health)",
+      "Bash(curl:*)",
+      "Bash(git rm:*)",
+      "Bash(taskkill /F /PID 9680)",
+      "Bash(taskkill:*)",
+      "Bash(git add:*)",
+      "Bash(git commit:*)",
+      "Bash(xargs ls:*)",
+      "Bash(python3 -c \"import sys,json; d=json.load\\(sys.stdin\\); [print\\(e['Route']\\) for e in d.get\\('Endpoints',[]\\)[:20]]\")",
+      "Bash(python3:*)"
     ]
   }
 }

VideoStudy.API/Controllers/LicenseController.cs

@@ -1,70 +0,0 @@
-using Microsoft.AspNetCore.Mvc;
-using System.Collections.Concurrent;
-
-namespace VideoStudy.API.Controllers;
-
-public class ActivationRequest
-{
-    public string Email { get; set; } = string.Empty;
-    public string HardwareId { get; set; } = string.Empty;
-}
-
-public class LicenseStatus
-{
-    public bool IsActive { get; set; }
-    public string Message { get; set; } = string.Empty;
-    public string Token { get; set; } = string.Empty;
-}
-
-[ApiController]
-[Route("api/[controller]")]
-public class LicenseController : ControllerBase
-{
-    // In-memory simulation for Phase 4 Demo
-    private static readonly ConcurrentDictionary<string, List<string>> _activations = new();
-
-    [HttpPost("activate")]
-    public ActionResult<LicenseStatus> Activate([FromBody] ActivationRequest request)
-    {
-        if (string.IsNullOrWhiteSpace(request.Email) || string.IsNullOrWhiteSpace(request.HardwareId))
-        {
-            return BadRequest(new LicenseStatus { IsActive = false, Message = "Invalid request" });
-        }
-
-        // Simulate database lookup
-        if (!_activations.ContainsKey(request.Email))
-        {
-            _activations[request.Email] = new List<string>();
-        }
-
-        var userDevices = _activations[request.Email];
-
-        // Check if device already active
-        if (userDevices.Contains(request.HardwareId))
-        {
-            return Ok(new LicenseStatus { IsActive = true, Message = "Device already activated", Token = GenerateMockToken(request) });
-        }
-
-        // Limit to 3 devices
-        if (userDevices.Count >= 3)
-        {
-            return StatusCode(403, new LicenseStatus { IsActive = false, Message = "Activation limit reached (Max 3 devices)" });
-        }
-
-        // Activate
-        userDevices.Add(request.HardwareId);
-        return Ok(new LicenseStatus { IsActive = true, Message = "Activation successful", Token = GenerateMockToken(request) });
-    }
-
-    [HttpPost("validate")]
-    public ActionResult<bool> Validate([FromBody] string token)
-    {
-        // Mock validation
-        return Ok(!string.IsNullOrEmpty(token) && token.StartsWith("MOCK_JWT_"));
-    }
-
-    private string GenerateMockToken(ActivationRequest req)
-    {
-        return $"MOCK_JWT_{Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(req.Email + req.HardwareId))}";
-    }
-}

VideoStudy.API/Services/AnalysisService.cs

@@ -1,15 +1,13 @@
 using System.Diagnostics;
 using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 using System.Text.Json;
 using System.Text.RegularExpressions;
-using System.Threading;
 using Microsoft.SemanticKernel;
 using Microsoft.SemanticKernel.ChatCompletion;
-using PuppeteerSharp;
 using QuestPDF.Fluent;
 using QuestPDF.Helpers;
 using QuestPDF.Infrastructure;
-using SkiaSharp;
 using VideoStudy.Shared;
 
 namespace VideoStudy.API.Services;
@@ -18,51 +16,39 @@ public class AnalysisService
 {
     private readonly Kernel _kernel;
     private readonly ILogger<AnalysisService> _logger;
+    private readonly IConfiguration _configuration;
 
-    public AnalysisService(Kernel kernel, ILogger<AnalysisService> logger)
+    public AnalysisService(Kernel kernel, ILogger<AnalysisService> logger, IConfiguration configuration)
     {
         _kernel = kernel;
         _logger = logger;
+        _configuration = configuration;
         QuestPDF.Settings.License = LicenseType.Community;
-
-        Task.Run(async () => {
-            try
-            {
-                var browserFetcher = new BrowserFetcher();
-                await browserFetcher.DownloadAsync();
-            }
-            catch (Exception ex)
-            {
-                _logger.LogError(ex, "Failed to download Chromium.");
-            }
-        });
     }
 
     private string GetYtDlpPath()
     {
-        if (System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(System.Runtime.InteropServices.OSPlatform.Windows))
+        string exeName = RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? "yt-dlp.exe" :
+                         RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ? "yt-dlp_macos" : "yt-dlp_linux";
+
+        // Walk up from base directory looking for yt-dlp
+        var dir = new DirectoryInfo(AppDomain.CurrentDomain.BaseDirectory);
+        for (int i = 0; i < 7; i++)
         {
-            var exeName = "yt-dlp.exe";
-            var currentPath = Path.Combine(Directory.GetCurrentDirectory(), exeName);
-            if (File.Exists(currentPath)) return currentPath;
-            var basePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, exeName);
-            if (File.Exists(basePath)) return basePath;
-            var binPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Binaries", exeName);
+            var path = Path.Combine(dir.FullName, exeName);
+            if (File.Exists(path)) return path;
+            var binPath = Path.Combine(dir.FullName, "Binaries", exeName);
             if (File.Exists(binPath)) return binPath;
-            return "yt-dlp";
+            if (dir.Parent == null) break;
+            dir = dir.Parent;
         }
-        else
+        return "yt-dlp"; // fallback to PATH
+    }
+
+    private string GetCookiesArg()
     {
-            var baseDir = AppDomain.CurrentDomain.BaseDirectory;
-            var binariesDir = Path.Combine(baseDir, "Binaries");
-            string executableName = "yt-dlp_linux"; 
-            if (System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(System.Runtime.InteropServices.OSPlatform.OSX))
-                executableName = "yt-dlp_macos";
-            var fullPath = Path.Combine(binariesDir, executableName);
-            if (!File.Exists(fullPath)) return "yt-dlp";
-            try { Process.Start("chmod", $"+x \"{fullPath}\"").WaitForExit(); } catch { }
-            return fullPath;
-        }
+        var browser = _configuration["YtDlp:CookiesBrowser"];
+        return string.IsNullOrWhiteSpace(browser) ? "" : $"--cookies-from-browser {browser}";
     }
 
     public async IAsyncEnumerable<AnalysisEvent> AnalyzeVideoAsync(AnalysisRequest request, [EnumeratorCancellation] CancellationToken cancellationToken = default)
@@ -73,7 +59,6 @@ public class AnalysisService
         string? errorMessage = null;
         AnalysisResult? finalResult = null;
 
-        // ETAPA 0: Obter Info do Vídeo
         yield return new AnalysisEvent { ProgressPercentage = 5, Message = "Obtendo informações do vídeo..." };
         VideoInfo? videoInfo = null;
         try {
@@ -86,12 +71,11 @@ public class AnalysisService
         {
             yield return new AnalysisEvent { ProgressPercentage = 10, Message = $"Analisando: {videoInfo.Title}" };
 
-            // ETAPA 1: Transcrição
             yield return new AnalysisEvent { ProgressPercentage = 15, Message = "Obtendo transcrição..." };
             string? transcript = null;
+            string? transcriptReadable = null;
             try {
-                var (t, _) = await GetTranscriptViaYtDlpAsync(request.VideoUrl, request.Language, tempDir);
-                transcript = t;
+                (transcript, transcriptReadable) = await GetTranscriptViaYtDlpAsync(request.VideoUrl, request.Language, tempDir);
                 if (string.IsNullOrWhiteSpace(transcript)) errorMessage = "O vídeo não possui transcrição disponível.";
             } catch (Exception ex) {
                 errorMessage = $"Erro na transcrição: {ex.Message}";
@@ -99,38 +83,37 @@ public class AnalysisService
 
             if (errorMessage == null && transcript != null)
             {
-                // ETAPA 2: Inteligência Artificial
-                yield return new AnalysisEvent { ProgressPercentage = 40, Message = "IA estruturando conteúdo técnico..." };
+                yield return new AnalysisEvent { ProgressPercentage = 40, Message = "IA estruturando conteúdo..." };
                 List<TutorialSection>? sections = null;
                 string? rawJson = null, category = null, docTitle = null, summary = null;
 
                 try {
-                    var aiResult = await GenerateTutorialContentAsync(transcript, videoInfo, request.Language, request.OutputLanguage, cancellationToken);
+                    var aiResult = await GenerateTutorialContentAsync(transcript, videoInfo, request.Language, request.OutputLanguage, request.UserContext, cancellationToken);
                     sections = aiResult.sections;
                     rawJson = aiResult.rawJson;
                     category = aiResult.category;
                     docTitle = aiResult.docTitle;
                     summary = aiResult.summary;
                 } catch (Exception ex) {
-                    errorMessage = $"IA Indisponível: {ex.Message}. Verifique se excedeu o limite do Groq.";
+                    errorMessage = $"IA Indisponível: {ex.Message}. Verifique a chave do Groq.";
                 }
 
                 if (errorMessage == null && sections != null)
                 {
-                    // ETAPA 3: Screenshots
-                    var sectionsToCapture = sections.Where(s => !string.IsNullOrEmpty(s.ImageTimestamp)).ToList();
-                    if (sectionsToCapture.Any())
+                    var sectionsWithImages = sections.Where(s => !string.IsNullOrEmpty(s.ImageTimestamp)).ToList();
+                    if (sectionsWithImages.Any())
                     {
-                        yield return new AnalysisEvent { ProgressPercentage = 70, Message = $"Capturando {sectionsToCapture.Count} imagens críticas..." };
+                        yield return new AnalysisEvent { ProgressPercentage = 70, Message = $"Capturando {sectionsWithImages.Count} imagens com FFmpeg..." };
                         try {
-                            await CaptureScreenshotsInParallelAsync(request.VideoUrl, sectionsToCapture, videoInfo.Duration, cancellationToken);
-                        } catch { /* Erros de imagem são ignorados para não travar o PDF */ }
+                            await CaptureScreenshotsAsync(request.VideoUrl, sectionsWithImages, videoInfo.Duration, cancellationToken);
+                        } catch (Exception ex) {
+                            _logger.LogWarning(ex, "Falha na captura de screenshots — continuando sem imagens.");
+                        }
                     }
 
-                    // ETAPA 4: PDF
                     yield return new AnalysisEvent { ProgressPercentage = 90, Message = "Gerando documento PDF..." };
                     try {
-                        var pdfBytes = GeneratePdf(docTitle!, summary!, request.VideoUrl, sections, category!);
+                        var pdfBytes = GeneratePdf(docTitle!, summary!, request.VideoUrl, sections, category!, transcriptReadable);
                         finalResult = new AnalysisResult {
                             VideoTitle = videoInfo.Title,
                             DocumentTitle = docTitle!,
@@ -148,7 +131,6 @@ public class AnalysisService
             }
         }
 
-        // LIMPEZA E RESULTADO FINAL
         try { if (Directory.Exists(tempDir)) Directory.Delete(tempDir, true); } catch { }
 
         if (errorMessage != null) {
@@ -158,103 +140,203 @@ public class AnalysisService
         }
     }
 
-    private async Task CaptureScreenshotsInParallelAsync(string videoUrl, List<TutorialSection> sections, TimeSpan videoDuration, CancellationToken ct)
+    private async Task CaptureScreenshotsAsync(string videoUrl, List<TutorialSection> sections, TimeSpan videoDuration, CancellationToken ct)
     {
-        var rawUrl = await GetRawVideoStreamUrl(videoUrl);
-        if (string.IsNullOrEmpty(rawUrl)) return;
-        using var sem = new SemaphoreSlim(3);
-        await Task.WhenAll(sections.Select(s => ProcessSingleSection(s, rawUrl, videoDuration, sem, ct)));
+        var streamUrl = await GetRawVideoStreamUrl(videoUrl);
+        if (string.IsNullOrEmpty(streamUrl)) return;
+
+        using var sem = new SemaphoreSlim(2);
+        await Task.WhenAll(sections.Select(s => CaptureFrameAsync(s, streamUrl, videoDuration, sem, ct)));
     }
 
-    private async Task ProcessSingleSection(TutorialSection section, string rawUrl, TimeSpan duration, SemaphoreSlim sem, CancellationToken ct)
+    private async Task CaptureFrameAsync(TutorialSection section, string streamUrl, TimeSpan duration, SemaphoreSlim sem, CancellationToken ct)
     {
         await sem.WaitAsync(ct);
+        var outputFile = Path.Combine(Path.GetTempPath(), $"vs_frame_{Guid.NewGuid()}.jpg");
         try
         {
-            using var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true, Args = new[] { "--no-sandbox" } });
-            using var page = await browser.NewPageAsync();
-            await page.SetViewportAsync(new ViewPortOptions { Width = 1280, Height = 720 });
-            await page.SetContentAsync($"<html><body style='margin:0;background:black;'><video id='v' width='1280' height='720' src='{rawUrl}'></video></body></html>");
-            await page.WaitForSelectorAsync("#v");
+            if (!TimeSpan.TryParse(section.ImageTimestamp, out var ts) || ts > duration) return;
 
-            if (!TimeSpan.TryParse(section.ImageTimestamp, out var ts)) return;
-            int target = (int)ts.TotalSeconds;
-            var candidates = new List<(byte[] Data, double Score)>();
-
-            foreach (var offset in new[] { 0, -1, 1 })
+            var args = $"-ss {ts:hh\\:mm\\:ss} -i \"{streamUrl}\" -frames:v 1 -q:v 2 -y \"{outputFile}\"";
+            var psi = new ProcessStartInfo
             {
-                if (ct.IsCancellationRequested) break;
-                int time = Math.Max(0, target + offset);
-                if (time > duration.TotalSeconds) continue;
-                try {
-                    await page.EvaluateFunctionAsync($"(s) => document.getElementById('v').currentTime = s", time);
-                    await page.WaitForFunctionAsync("() => document.getElementById('v').readyState >= 3", new WaitForFunctionOptions { Timeout = 5000 });
-                    var data = await page.ScreenshotDataAsync(new ScreenshotOptions { Type = ScreenshotType.Jpeg, Quality = 85 });
-                    var score = CalculateImageClarityScore(data);
-                    if (score > 10) candidates.Add((data, score));
-                } catch { }
+                FileName = "ffmpeg",
+                Arguments = args,
+                RedirectStandardError = false,
+                UseShellExecute = false,
+                CreateNoWindow = true
+            };
+            using var p = Process.Start(psi)!;
+            await p.WaitForExitAsync(ct);
+
+            if (p.ExitCode == 0 && File.Exists(outputFile))
+                section.ImageData = await File.ReadAllBytesAsync(outputFile, ct);
         }
-            if (candidates.Any()) section.ImageData = candidates.OrderByDescending(c => c.Score).First().Data;
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Screenshot falhou em {Timestamp}", section.ImageTimestamp);
+        }
+        finally
+        {
+            if (File.Exists(outputFile)) File.Delete(outputFile);
+            sem.Release();
         }
-        finally { sem.Release(); }
     }
 
     public async Task<VideoInfo> GetVideoInfoAsync(string url, CancellationToken ct)
     {
-        var path = GetYtDlpPath();
-        var proc = Process.Start(new ProcessStartInfo { FileName = path, Arguments = $"--print title --print channel --print duration --print thumbnail --print description \"{url}\"", RedirectStandardOutput = true, UseShellExecute = false, CreateNoWindow = true });
-        await proc!.WaitForExitAsync(ct);
-        var output = await proc.StandardOutput.ReadToEndAsync();
+        var ytdlp = GetYtDlpPath();
+        var cookies = GetCookiesArg();
+        var psi = new ProcessStartInfo
+        {
+            FileName = ytdlp,
+            Arguments = $"{cookies} --print title --print channel --print duration --print thumbnail \"{url}\"",
+            RedirectStandardOutput = true,
+            UseShellExecute = false,
+            CreateNoWindow = true
+        };
+        using var proc = Process.Start(psi)!;
+        await proc.WaitForExitAsync(ct);
+        var output = await proc.StandardOutput.ReadToEndAsync(ct);
         var lines = output.Split('\n', StringSplitOptions.RemoveEmptyEntries);
         if (lines.Length < 1) throw new Exception("Falha ao ler dados do vídeo via yt-dlp.");
 
         double.TryParse(lines.Length > 2 ? lines[2] : "0", System.Globalization.NumberStyles.Any, System.Globalization.CultureInfo.InvariantCulture, out var sec);
-        return new VideoInfo { Title = lines[0].Trim(), Author = lines[1].Trim(), Duration = TimeSpan.FromSeconds(sec), ThumbnailUrl = lines.Length > 3 ? lines[3].Trim() : "", Description = lines.Length > 4 ? string.Join("\n", lines.Skip(4)).Trim() : "", Url = url };
+        return new VideoInfo
+        {
+            Title = lines[0].Trim(),
+            Author = lines.Length > 1 ? lines[1].Trim() : "",
+            Duration = TimeSpan.FromSeconds(sec),
+            ThumbnailUrl = lines.Length > 3 ? lines[3].Trim() : "",
+            Url = url
+        };
     }
 
-    private async Task<(string, string)> GetTranscriptViaYtDlpAsync(string url, string lang, string dir)
+    private async Task<(string flat, string readable)> GetTranscriptViaYtDlpAsync(string url, string lang, string dir)
     {
-        var path = GetYtDlpPath();
-        var start = new ProcessStartInfo { FileName = path, Arguments = $"--skip-download --write-sub --write-auto-sub --sub-lang {lang},en --sub-format vtt --output \"%(id)s\" \"{url}\"", WorkingDirectory = dir, RedirectStandardOutput = true, UseShellExecute = false, CreateNoWindow = true };
-        using var p = Process.Start(start);
-        await p!.WaitForExitAsync();
+        var ytdlp = GetYtDlpPath();
+        var cookies = GetCookiesArg();
+        var psi = new ProcessStartInfo
+        {
+            FileName = ytdlp,
+            Arguments = $"{cookies} --skip-download --write-auto-sub --sub-lang {lang},en --sub-format vtt --output \"%(id)s\" \"{url}\"",
+            WorkingDirectory = dir,
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+            UseShellExecute = false,
+            CreateNoWindow = true
+        };
+        using var p = Process.Start(psi)!;
+        await p.WaitForExitAsync();
         var file = Directory.GetFiles(dir, "*.vtt").FirstOrDefault();
-        return file == null ? ("", "") : (ParseVttToText(await File.ReadAllTextAsync(file)), "");
+        if (file == null) return ("", "");
+        var vtt = await File.ReadAllTextAsync(file);
+        return (ParseVttToFlat(vtt), ParseVttToReadable(vtt));
     }
 
-    private string ParseVttToText(string vtt)
+    private string ParseVttToFlat(string vtt)
     {
-        var lines = vtt.Split('\n').Select(l => l.Trim()).Where(l => !string.IsNullOrEmpty(l) && !l.StartsWith("WEBVTT") && !l.StartsWith("NOTE") && !l.Contains("-->"));
+        var lines = vtt.Split('\n')
+            .Select(l => l.Trim())
+            .Where(l => !string.IsNullOrEmpty(l) && !l.StartsWith("WEBVTT") && !l.StartsWith("NOTE") && !l.Contains("-->"));
         return string.Join(" ", lines.Select(l => Regex.Replace(l, @"<[^>]*>", ""))).Replace("  ", " ");
     }
 
-    private async Task<(List<TutorialSection> sections, string rawJson, string category, string docTitle, string summary)> GenerateTutorialContentAsync(string transcript, VideoInfo video, string inLang, string? outLang, CancellationToken ct)
+    private string ParseVttToReadable(string vtt)
     {
-        var langMap = new Dictionary<string, string> { {"en", "English"}, {"pt", "Portuguese (Brazilian)"}, {"es", "Spanish"} };
+        // Parse cues: timestamp line + text lines
+        var cues = new List<(TimeSpan time, string text)>();
+        var lines = vtt.Split('\n').Select(l => l.Trim()).ToArray();
+
+        for (int i = 0; i < lines.Length; i++)
+        {
+            var line = lines[i];
+            if (!line.Contains("-->")) continue;
+
+            // Parse start time from "HH:MM:SS.mmm --> HH:MM:SS.mmm"
+            var timePart = line.Split("-->")[0].Trim().Replace(',', '.');
+            if (!TimeSpan.TryParse(timePart, out var ts)) continue;
+
+            // Collect text lines until blank
+            var textLines = new List<string>();
+            i++;
+            while (i < lines.Length && !string.IsNullOrEmpty(lines[i]) && !lines[i].Contains("-->"))
+            {
+                var t = Regex.Replace(lines[i], @"<[^>]*>", "").Trim();
+                if (!string.IsNullOrEmpty(t)) textLines.Add(t);
+                i++;
+            }
+            i--; // step back, outer loop will increment
+
+            if (textLines.Count > 0)
+                cues.Add((ts, string.Join(" ", textLines)));
+        }
+
+        if (cues.Count == 0) return ParseVttToFlat(vtt);
+
+        // Merge consecutive cues with same/similar text (VTT often duplicates lines)
+        var merged = new List<(TimeSpan time, string text)>();
+        foreach (var cue in cues)
+        {
+            if (merged.Count > 0 && merged[^1].text == cue.text) continue;
+            merged.Add(cue);
+        }
+
+        // Group into paragraphs every ~60 seconds
+        var sb = new System.Text.StringBuilder();
+        TimeSpan? paraStart = null;
+        var paraWords = new List<string>();
+
+        void FlushParagraph()
+        {
+            if (paraWords.Count == 0) return;
+            sb.AppendLine($"[{paraStart!.Value:hh\\:mm\\:ss}]  {string.Join(" ", paraWords)}");
+            sb.AppendLine();
+            paraWords.Clear();
+            paraStart = null;
+        }
+
+        foreach (var (time, text) in merged)
+        {
+            if (paraStart == null) paraStart = time;
+            paraWords.Add(text);
+            if ((time - paraStart.Value).TotalSeconds >= 60)
+                FlushParagraph();
+        }
+        FlushParagraph();
+
+        return sb.ToString().TrimEnd();
+    }
+
+    private async Task<(List<TutorialSection> sections, string rawJson, string category, string docTitle, string summary)>
+        GenerateTutorialContentAsync(string transcript, VideoInfo video, string inLang, string? outLang, string? userContext, CancellationToken ct)
+    {
+        var langMap = new Dictionary<string, string> { { "en", "English" }, { "pt", "Portuguese (Brazilian)" }, { "es", "Spanish" }, { "fr", "French" } };
         var outName = langMap.GetValueOrDefault(outLang ?? inLang, "Portuguese (Brazilian)");
         var dur = video.Duration.ToString(@"hh\:mm\:ss");
+        var contextSection = string.IsNullOrWhiteSpace(userContext)
+            ? ""
+            : $"\n### CONTEXTO DO USUÁRIO:\n{userContext}\nUse este contexto para ajustar o nível de detalhe, linguagem e foco da análise.\n";
 
-        var prompt = $@"
-Você é um ANALISTA TÉCNICO DE CONTEÚDO especializado em converter vídeos em documentação estruturada.
-
-### REGRAS DE OURO:
-1. NÃO RESUMA: Transforme cada explicação do vídeo em um tópico técnico detalhado e denso.
-2. ISONOMIA: Dedique o mesmo nível de profundidade a todos os tópicos. Se o vídeo explica 5 curiosidades, gere 5 seções extensas.
-3. FOCO NO TÍTULO: Garanta que o tema ""{video.Title}"" seja a seção de maior clareza e detalhamento.
-4. SCREENSHOTS: Insira `[SCREENSHOT: HH:MM:SS]` ao final de parágrafos que descrevam algo visualmente importante. (Limite: {dur}).
+        var prompt = $@"Você é um ANALISTA TÉCNICO DE CONTEÚDO especializado em converter vídeos em documentação estruturada.
+{contextSection}
+### REGRAS:
+1. Transforme cada explicação em um tópico técnico detalhado — NÃO resuma demais.
+2. Dedique o mesmo nível de profundidade a todos os tópicos.
+3. Garanta que o tema ""{video.Title}"" seja a seção de maior clareza.
+4. Insira `[SCREENSHOT: HH:MM:SS]` ao final de parágrafos com algo visualmente importante. (Limite: {dur})
 
 ### DADOS:
 - Título: {video.Title}
-- Descrição: {video.Description}
 - Transcrição: {transcript[..Math.Min(transcript.Length, 25000)]}
 
 ### FORMATO DE SAÍDA (JSON):
 {{
-  ""category"": ""TUTORIAL | MEETING | LECTURE | OTHER"",
+  ""category"": ""TUTORIAL | LECTURE | OTHER"",
   ""shortTitle"": ""Título Curto e Limpo"",
-  ""summary"": ""Um único parágrafo de até 4 linhas sintetizando o valor principal do vídeo."",
+  ""summary"": ""Um parágrafo de até 4 linhas resumindo o valor principal do vídeo."",
   ""sections"": [
-    {{ ""title"": ""Título do Tópico"", ""content"": ""Explicação técnica densa... [SCREENSHOT: HH:MM:SS]"" }}
+    {{ ""title"": ""Título do Tópico"", ""content"": ""Explicação densa... [SCREENSHOT: HH:MM:SS]"" }}
   ]
 }}
 Escreva tudo em {outName}.";
@@ -272,65 +354,127 @@ Escreva tudo em {outName}.";
         using var doc = JsonDocument.Parse(json);
         var root = doc.RootElement;
 
-        var sections = root.GetProperty("sections").EnumerateArray().Select(el => new TutorialSection {
+        var sections = root.GetProperty("sections").EnumerateArray().Select(el =>
+        {
+            var content = el.GetProperty("content").GetString() ?? "";
+            var tsMatch = Regex.Match(content, @"\[SCREENSHOT:\s*(\d{2}:\d{2}:\d{2})\]");
+            return new TutorialSection
+            {
                 Title = el.GetProperty("title").GetString() ?? "",
-            Content = Regex.Replace(el.GetProperty("content").GetString() ?? "", @"\[SCREENSHOT: \d{2}:\d{2}:\d{2}\]", "").Trim(),
-            ImageTimestamp = Regex.Match(el.GetProperty("content").GetString() ?? "", @"\[SCREENSHOT:\s*(\d{2}:\d{2}:\d{2})\]").Groups[1].Value
+                Content = Regex.Replace(content, @"\[SCREENSHOT: \d{2}:\d{2}:\d{2}\]", "").Trim(),
+                ImageTimestamp = tsMatch.Success ? tsMatch.Groups[1].Value : null
+            };
         }).ToList();
 
-        return (sections, json, root.GetProperty("category").GetString() ?? "OTHER", root.GetProperty("shortTitle").GetString() ?? video.Title, root.GetProperty("summary").GetString() ?? "");
+        return (sections, json,
+            root.GetProperty("category").GetString() ?? "OTHER",
+            root.GetProperty("shortTitle").GetString() ?? video.Title,
+            root.GetProperty("summary").GetString() ?? "");
     }
 
     private async Task<string?> GetRawVideoStreamUrl(string url)
     {
-        var proc = Process.Start(new ProcessStartInfo { FileName = GetYtDlpPath(), Arguments = $"-g -f b \"{url}\"", RedirectStandardOutput = true, UseShellExecute = false, CreateNoWindow = true });
-        return (await proc!.StandardOutput.ReadLineAsync())?.Trim();
+        var ytdlp = GetYtDlpPath();
+        var cookies = GetCookiesArg();
+        var psi = new ProcessStartInfo
+        {
+            FileName = ytdlp,
+            Arguments = $"{cookies} -g -f \"bv*[height<=720][ext=mp4]/bv*[height<=720]/b\" \"{url}\"",
+            RedirectStandardOutput = true,
+            RedirectStandardError = true,
+            UseShellExecute = false,
+            CreateNoWindow = true
+        };
+        using var proc = Process.Start(psi)!;
+        var line = await proc.StandardOutput.ReadLineAsync();
+        await proc.WaitForExitAsync();
+        return line?.Trim();
     }
 
-    private double CalculateImageClarityScore(byte[] bytes)
+    private byte[] GeneratePdf(string title, string summary, string url, List<TutorialSection> sections, string category, string? transcriptReadable = null)
     {
-        try {
-            using var img = SKBitmap.Decode(bytes);
-            if (img == null) return -1;
-            var lumas = new List<float>();
-            for (int y = 0; y < img.Height; y += 20) for (int x = 0; x < img.Width; x += 20) {
-                var p = img.GetPixel(x,y);
-                lumas.Add(p.Red * 0.299f + p.Green * 0.587f + p.Blue * 0.114f);
-            }
-            var avg = lumas.Average();
-            return Math.Sqrt(lumas.Sum(v => Math.Pow(v - avg, 2)) / lumas.Count);
-        } catch { return -1; }
-    }
-
-    private byte[] GeneratePdf(string title, string summary, string url, List<TutorialSection> sections, string category)
+        var color = category switch { "TUTORIAL" => Colors.Green.Medium, "LECTURE" => Colors.Orange.Medium, _ => Colors.Blue.Medium };
+        return Document.Create(container =>
+        {
+            // Main content page
+            container.Page(page =>
             {
-        var color = category switch { "TUTORIAL" => Colors.Green.Medium, "MEETING" => Colors.Orange.Medium, _ => Colors.Blue.Medium };
-        return Document.Create(container => {
-            container.Page(page => {
                 page.Margin(2, Unit.Centimetre);
                 page.DefaultTextStyle(x => x.FontSize(11).FontFamily("Segoe UI"));
-                page.Header().Column(c => {
-                    c.Item().Row(r => {
+                page.Header().Column(c =>
+                {
+                    c.Item().Row(r =>
+                    {
                         r.RelativeItem().Text(title).SemiBold().FontSize(22).FontColor(Colors.Blue.Darken3);
                         r.ConstantItem(80).AlignRight().Text(category).Bold().FontSize(10).FontColor(color);
                     });
                     c.Item().PaddingTop(5).LineHorizontal(1).LineColor(Colors.Grey.Lighten2);
                 });
-                page.Content().PaddingVertical(1, Unit.Centimetre).Column(col => {
-                    col.Item().Background(Colors.Grey.Lighten4).Padding(10).Column(rc => {
+                page.Content().PaddingVertical(1, Unit.Centimetre).Column(col =>
+                {
+                    col.Item().Background(Colors.Grey.Lighten4).Padding(10).Column(rc =>
+                    {
                         rc.Item().Text("Resumo").Bold().FontSize(12).FontColor(Colors.Blue.Medium);
                         rc.Item().PaddingTop(2).Text(summary).Italic();
                     });
                     col.Item().PaddingTop(10).Text(t => { t.Span("Fonte: ").SemiBold(); t.Span(url).Italic().FontSize(9); });
 
-                    foreach (var s in sections) {
+                    foreach (var s in sections)
+                    {
                         col.Item().PaddingTop(20).Text(s.Title).Bold().FontSize(16).FontColor(color);
                         col.Item().PaddingTop(5).Text(s.Content).LineHeight(1.5f);
                         if (s.ImageData != null) col.Item().PaddingVertical(10).Image(s.ImageData).FitWidth();
                     }
                 });
-                page.Footer().AlignCenter().Text(x => { x.Span("VideoStudy.app - "); x.CurrentPageNumber(); });
+                page.Footer().AlignCenter().Text(x => { x.Span("VideoStudy.app — "); x.CurrentPageNumber(); });
             });
+
+            // Transcript appendix page
+            if (!string.IsNullOrWhiteSpace(transcriptReadable))
+            {
+                container.Page(page =>
+                {
+                    page.Margin(2, Unit.Centimetre);
+                    page.DefaultTextStyle(x => x.FontSize(10).FontFamily("Segoe UI"));
+                    page.Header().Column(c =>
+                    {
+                        c.Item().Row(r =>
+                        {
+                            r.RelativeItem().Text("Apêndice — Transcrição").SemiBold().FontSize(18).FontColor(Colors.Grey.Darken2);
+                            r.ConstantItem(80).AlignRight().Text(title).FontSize(8).FontColor(Colors.Grey.Medium).Italic();
+                        });
+                        c.Item().PaddingTop(5).LineHorizontal(1).LineColor(Colors.Grey.Lighten2);
+                        c.Item().PaddingTop(4).Text("Cada parágrafo representa aproximadamente 60 segundos. O timestamp indica o início do trecho.")
+                            .FontSize(8).Italic().FontColor(Colors.Grey.Medium);
+                    });
+                    page.Content().PaddingVertical(1, Unit.Centimetre).Column(col =>
+                    {
+                        foreach (var paragraph in transcriptReadable.Split("\n\n", StringSplitOptions.RemoveEmptyEntries))
+                        {
+                            var trimmed = paragraph.Trim();
+                            if (string.IsNullOrEmpty(trimmed)) continue;
+
+                            // Split timestamp from text: "[HH:MM:SS]  rest of text"
+                            var bracketEnd = trimmed.IndexOf(']');
+                            if (bracketEnd > 0 && trimmed.StartsWith('['))
+                            {
+                                var timestamp = trimmed[..(bracketEnd + 1)];
+                                var text = trimmed[(bracketEnd + 1)..].Trim();
+                                col.Item().PaddingBottom(8).Column(p =>
+                                {
+                                    p.Item().Text(timestamp).Bold().FontSize(9).FontColor(Colors.Blue.Medium);
+                                    p.Item().PaddingTop(2).Text(text).LineHeight(1.5f);
+                                });
+                            }
+                            else
+                            {
+                                col.Item().PaddingBottom(8).Text(trimmed).LineHeight(1.5f);
+                            }
+                        }
+                    });
+                    page.Footer().AlignCenter().Text(x => { x.Span("VideoStudy.app — "); x.CurrentPageNumber(); });
+                });
+            }
         }).GeneratePdf();
     }
 }

VideoStudy.API/VideoStudy.API.csproj

@@ -13,14 +13,6 @@
     <PackageReference Include="Microsoft.SemanticKernel.Connectors.OpenAI" Version="1.70.0" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="10.1.2" />
     <PackageReference Include="QuestPDF" Version="2023.12.0" />
-    <PackageReference Include="PuppeteerSharp" Version="20.1.0" />
-    <PackageReference Include="SkiaSharp.NativeAssets.Linux.NoDependencies" Version="2.88.7" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <None Update="Binaries\**\*">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </None>
   </ItemGroup>
 
   <ItemGroup>

VideoStudy.API/appsettings.json

@@ -13,9 +13,12 @@
       "Model": "llama3.1"
     },
     "Groq": {
-      "ApiKey": "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",
+      "ApiKey": "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",
       "Model": "llama-3.3-70b-versatile",
       "BaseUrl": "https://api.groq.com/openai/v1"
     }
+  },
+  "YtDlp": {
+    "CookiesBrowser": "firefox"
   }
 }

VideoStudy.App/AppShell.razor

@@ -0,0 +1,21 @@
+@using Microsoft.AspNetCore.Components.Web
+@using static Microsoft.AspNetCore.Components.Web.RenderMode
+@using VideoStudy.UI
+
+<!DOCTYPE html>
+<html lang="pt-BR">
+<head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>VideoStudy</title>
+    <base href="/" />
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet" />
+    <link rel="stylesheet" href="_content/VideoStudy.UI/app.css" />
+    <HeadOutlet />
+</head>
+<body>
+    <Routes @rendermode="new InteractiveServerRenderMode(prerender: false)" />
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"></script>
+    <script src="_framework/blazor.web.js"></script>
+</body>
+</html>

VideoStudy.App/Program.cs

@@ -0,0 +1,58 @@
+using System.Threading;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.DependencyInjection;
+using Photino.NET;
+using VideoStudy.UI;
+
+namespace VideoStudy.App;
+
+class Program
+{
+    [STAThread]
+    static void Main(string[] args)
+    {
+        const string appUrl = "http://localhost:5002";
+
+        var serverReady = new ManualResetEventSlim(false);
+
+        // Start Blazor Server in background thread
+        var serverThread = new Thread(() =>
+        {
+            var builder = WebApplication.CreateBuilder(args);
+
+            builder.Services.AddRazorComponents()
+                .AddInteractiveServerComponents();
+            builder.Services.AddVideoStudyUI();
+            builder.Services.AddScoped(_ => new HttpClient
+            {
+                BaseAddress = new Uri("http://localhost:5000"),
+                Timeout = TimeSpan.FromMinutes(10)
+            });
+
+            var app = builder.Build();
+            app.UseStaticFiles();
+            app.UseAntiforgery();
+            app.MapRazorComponents<AppShell>()
+                .AddInteractiveServerRenderMode()
+                .AddAdditionalAssemblies(typeof(Routes).Assembly);
+
+            app.Lifetime.ApplicationStarted.Register(() => serverReady.Set());
+            app.Run(appUrl);
+        });
+        serverThread.IsBackground = true;
+        serverThread.Start();
+
+        // Wait for Kestrel to be ready (max 15s)
+        serverReady.Wait(TimeSpan.FromSeconds(15));
+
+        // Open native window pointing to local server
+        var window = new PhotinoWindow()
+            .SetTitle("VideoStudy")
+            .SetSize(1280, 800)
+            .SetDevToolsEnabled(true)
+            .Center()
+            .Load(new Uri(appUrl));
+
+        window.WaitForClose();
+    }
+}

VideoStudy.App/VideoStudy.App.csproj

@@ -0,0 +1,20 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <RootNamespace>VideoStudy.App</RootNamespace>
+    <!-- Cross-platform: Windows, Linux, macOS -->
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Photino.NET" Version="4.0.16" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\VideoStudy.UI\VideoStudy.UI.csproj" />
+  </ItemGroup>
+
+</Project>

VideoStudy.App/wwwroot/index.html

@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html lang="pt-BR">
+<head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>VideoStudy</title>
+    <base href="/" />
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet" />
+    <link rel="stylesheet" href="_content/VideoStudy.UI/app.css" />
+</head>
+
+<body>
+    <div id="app">
+        <div style="position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;">
+            <div class="spinner-border text-primary" role="status"></div>
+            <div style="margin-top:10px;color:#666;">Carregando VideoStudy...</div>
+        </div>
+    </div>
+
+    <div id="blazor-error-ui" style="display:none;">
+        Ocorreu um erro inesperado.
+        <a href="" class="reload">Recarregar</a>
+        <a class="dismiss">🗙</a>
+    </div>
+
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"></script>
+    <script>
+        window.onerror = function(msg, url, line, col, error) {
+            document.getElementById('app').innerHTML =
+                '<div style="color:red;padding:2rem;font-family:monospace;">' +
+                '<b>Erro JS:</b><br>' + msg + '<br>' + url + ':' + line + '</div>';
+        };
+        window.addEventListener('unhandledrejection', function(e) {
+            document.getElementById('app').innerHTML =
+                '<div style="color:red;padding:2rem;font-family:monospace;">' +
+                '<b>Promise rejeitada:</b><br>' + (e.reason?.message || e.reason) + '</div>';
+        });
+    </script>
+    <script src="_framework/blazor.photino.js"></script>
+</body>
+</html>

VideoStudy.Native/App.xaml

@@ -1,7 +0,0 @@
-<?xml version = "1.0" encoding = "UTF-8" ?>
-<Application xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
-             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
-             x:Class="VideoStudy.Native.App">
-    <Application.Resources>
-    </Application.Resources>
-</Application>

VideoStudy.Native/App.xaml.cs

@@ -1,14 +0,0 @@
-namespace VideoStudy.Native;
-
-public partial class App : Application
-{
-    public App()
-    {
-        InitializeComponent();
-    }
-
-    protected override Window CreateWindow(IActivationState? activationState)
-    {
-        return new Window(new MainPage());
-    }
-}

VideoStudy.Native/MainPage.xaml

@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="utf-8" ?>
-<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
-             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
-             xmlns:blazor="clr-namespace:Microsoft.AspNetCore.Components.WebView.Maui;assembly=Microsoft.AspNetCore.Components.WebView.Maui"
-             xmlns:ui="clr-namespace:VideoStudy.UI;assembly=VideoStudy.UI"
-             x:Class="VideoStudy.Native.MainPage"
-             BackgroundColor="White">
-
-    <blazor:BlazorWebView x:Name="blazorWebView" HostPage="wwwroot/index.html">
-        <blazor:BlazorWebView.RootComponents>
-            <blazor:RootComponent Selector="#app" ComponentType="{x:Type ui:Routes}" />
-        </blazor:BlazorWebView.RootComponents>
-    </blazor:BlazorWebView>
-
-</ContentPage>

VideoStudy.Native/MainPage.xaml.cs

@@ -1,9 +0,0 @@
-namespace VideoStudy.Native;
-
-public partial class MainPage : ContentPage
-{
-    public MainPage()
-    {
-        InitializeComponent();
-    }
-}

VideoStudy.Native/MauiProgram.cs

@@ -1,40 +0,0 @@
-using Microsoft.AspNetCore.Components.WebView.Maui;
-using Microsoft.Extensions.Logging;
-using VideoStudy.Native.Services;
-using VideoStudy.Shared;
-using VideoStudy.UI;
-
-namespace VideoStudy.Native;
-
-public static class MauiProgram
-{
-    public static MauiApp CreateMauiApp()
-    {
-        var builder = MauiApp.CreateBuilder();
-        builder
-            .UseMauiApp<App>();
-
-        builder.Services.AddMauiBlazorWebView();
-
-#if DEBUG
-        builder.Services.AddBlazorWebViewDeveloperTools();
-        builder.Logging.AddDebug();
-        builder.Logging.SetMinimumLevel(LogLevel.Debug);
-#endif
-
-        // Configurar HttpClient para API Local (timeout longo para análise de vídeo)
-        builder.Services.AddScoped(sp => new HttpClient
-        {
-            BaseAddress = new Uri("http://localhost:5000"),
-            Timeout = TimeSpan.FromMinutes(10)
-        });
-
-        // PDF Saver (FileSavePicker do Windows)
-        builder.Services.AddSingleton<IPdfSaver, WindowsPdfSaver>();
-
-        // Persistence Service (LiteDB)
-        builder.Services.AddScoped<VideoStudy.Shared.Services.PersistenceService>();
-
-        return builder.Build();
-    }
-}

VideoStudy.Native/Platforms/Windows/App.xaml

@@ -1,7 +0,0 @@
-<maui:MauiWinUIApplication
-    x:Class="VideoStudy.Native.WinUI.App"
-    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-    xmlns:maui="using:Microsoft.Maui"
-    xmlns:local="using:VideoStudy.Native.WinUI">
-</maui:MauiWinUIApplication>

VideoStudy.Native/Platforms/Windows/App.xaml.cs

@@ -1,13 +0,0 @@
-using Microsoft.Maui;
-using Microsoft.Maui.Hosting;
-
-namespace VideoStudy.Native.WinUI;
-
-public partial class App : MauiWinUIApplication
-{
-	public App()
-	{
-	}
-
-	protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
-}

VideoStudy.Native/Platforms/Windows/Package.appxmanifest

@@ -1,49 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Package
-  xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
-  xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
-  xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
-  IgnorableNamespaces="uap rescap">
-
-  <Identity
-    Name="com.companyname.videostudy"
-    Publisher="CN=Ricardo"
-    Version="1.0.0.0" />
-
-  <Properties>
-    <DisplayName>VideoStudy</DisplayName>
-    <PublisherDisplayName>Ricardo</PublisherDisplayName>
-    <Logo>Resources\AppIcon\appicon.svg</Logo>
-  </Properties>
-
-  <Dependencies>
-    <TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.17763.0" MaxVersionTested="10.0.19041.0" />
-    <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.17763.0" MaxVersionTested="10.0.19041.0" />
-  </Dependencies>
-
-  <Resources>
-    <Resource Language="x-generate"/>
-  </Resources>
-
-  <Applications>
-    <Application Id="App"
-      Executable="$targetnametoken$.exe"
-      EntryPoint="$targetentrypoint$">
-      <uap:VisualElements
-        DisplayName="VideoStudy"
-        Description="VideoStudy"
-        BackgroundColor="transparent"
-        Square150x150Logo="Resources\AppIcon\appicon.svg"
-        Square44x44Logo="Resources\AppIcon\appicon.svg">
-        <uap:DefaultTile Wide310x150Logo="Resources\AppIcon\appicon.svg" />
-        <uap:SplashScreen Image="Resources\Splash\splash.svg" />
-      </uap:VisualElements>
-    </Application>
-  </Applications>
-
-  <Capabilities>
-    <rescap:Capability Name="runFullTrust" />
-    <Capability Name="internetClient" />
-  </Capabilities>
-
-</Package>

VideoStudy.Native/Resources/AppIcon/appicon.svg

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg width="128" height="128" viewBox="0 0 128 128" xmlns="http://www.w3.org/2000/svg">
-  <circle cx="64" cy="64" r="60" fill="#512BD4"/>
-</svg>

VideoStudy.Native/Resources/AppIcon/appiconfg.svg

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg width="128" height="128" viewBox="0 0 128 128" xmlns="http://www.w3.org/2000/svg">
-  <text x="50%" y="50%" dominant-baseline="middle" text-anchor="middle" font-family="Arial" font-size="40" fill="white">VS</text>
-</svg>

VideoStudy.Native/Resources/Images/dotnet_bot.svg

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg width="168" height="208" viewBox="0 0 168 208" xmlns="http://www.w3.org/2000/svg">
-  <rect width="168" height="208" fill="#512BD4"/>
-</svg>

VideoStudy.Native/Resources/Splash/splash.svg

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg width="128" height="128" viewBox="0 0 128 128" xmlns="http://www.w3.org/2000/svg">
-  <rect width="128" height="128" fill="#512BD4"/>
-  <text x="50%" y="50%" dominant-baseline="middle" text-anchor="middle" font-family="Arial" font-size="20" fill="white">VideoStudy</text>
-</svg>

VideoStudy.Native/Resources/Styles/Colors.xaml

@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" ?>
-<?xaml-comp compile="true" ?>
-<ResourceDictionary 
-    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
-    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml">
-
-    <Color x:Key="Primary">#512BD4</Color>
-    <Color x:Key="Secondary">#DFD8F7</Color>
-    <Color x:Key="Tertiary">#2B0B98</Color>
-    <Color x:Key="White">#FFFFFF</Color>
-    <Color x:Key="Black">#000000</Color>
-    <Color x:Key="Gray100">#E1E1E1</Color>
-    <Color x:Key="Gray200">#C8C8C8</Color>
-    <Color x:Key="Gray300">#ACACAC</Color>
-    <Color x:Key="Gray400">#919191</Color>
-    <Color x:Key="Gray500">#6E6E6E</Color>
-    <Color x:Key="Gray600">#404040</Color>
-    <Color x:Key="Gray900">#212121</Color>
-    <Color x:Key="Gray950">#141414</Color>
-
-    <SolidColorBrush x:Key="PrimaryBrush" Color="{StaticResource Primary}"/>
-    <SolidColorBrush x:Key="SecondaryBrush" Color="{StaticResource Secondary}"/>
-    <SolidColorBrush x:Key="TertiaryBrush" Color="{StaticResource Tertiary}"/>
-    <SolidColorBrush x:Key="WhiteBrush" Color="{StaticResource White}"/>
-    <SolidColorBrush x:Key="BlackBrush" Color="{StaticResource Black}"/>
-</ResourceDictionary>

VideoStudy.Native/Resources/Styles/Styles.xaml

@@ -1,27 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" ?>
-<?xaml-comp compile="true" ?>
-<ResourceDictionary 
-    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
-    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml">
-
-    <Style TargetType="ActivityIndicator">
-        <Setter Property="Color" Value="{StaticResource Primary}" />
-    </Style>
-
-    <Style TargetType="Button">
-        <Setter Property="TextColor" Value="{StaticResource White}" />
-        <Setter Property="BackgroundColor" Value="{StaticResource Primary}" />
-        <Setter Property="FontSize" Value="14" />
-        <Setter Property="CornerRadius" Value="8" />
-        <Setter Property="Padding" Value="14,10" />
-    </Style>
-
-    <Style TargetType="Label">
-        <Setter Property="TextColor" Value="{StaticResource Black}" />
-        <Setter Property="FontSize" Value="14" />
-    </Style>
-
-    <Style TargetType="Page">
-        <Setter Property="BackgroundColor" Value="{StaticResource White}" />
-    </Style>
-</ResourceDictionary>

VideoStudy.Native/Services/WindowsPdfSaver.cs

@@ -1,38 +0,0 @@
-using VideoStudy.Shared;
-using Windows.Storage;
-using Windows.Storage.Pickers;
-using WinRT.Interop;
-
-namespace VideoStudy.Native.Services;
-
-public class WindowsPdfSaver : IPdfSaver
-{
-    public async Task<string?> SavePdfAsync(byte[] pdfData, string suggestedFileName)
-    {
-        var savePicker = new FileSavePicker
-        {
-            SuggestedStartLocation = PickerLocationId.Downloads,
-            SuggestedFileName = suggestedFileName
-        };
-        savePicker.FileTypeChoices.Add("PDF", [".pdf"]);
-
-        // Get the window handle for the picker
-        var window = Application.Current?.Windows.FirstOrDefault();
-        var mauiWindow = window?.Handler?.PlatformView;
-        if (mauiWindow is Microsoft.UI.Xaml.Window winuiWindow)
-        {
-            var hwnd = WindowNative.GetWindowHandle(winuiWindow);
-            InitializeWithWindow.Initialize(savePicker, hwnd);
-        }
-
-        var file = await savePicker.PickSaveFileAsync();
-        if (file == null) return null;
-
-        await FileIO.WriteBytesAsync(file, pdfData);
-
-        // Open the PDF after saving
-        await Windows.System.Launcher.LaunchFileAsync(file);
-
-        return file.Path;
-    }
-}

VideoStudy.Native/VideoStudy.Native.csproj

@@ -1,39 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk.Razor">
-
-  <PropertyGroup>
-    <TargetFramework>net10.0-windows10.0.19041.0</TargetFramework>
-    <TargetPlatformMinVersion>10.0.17763.0</TargetPlatformMinVersion>
-    <OutputType>WinExe</OutputType>
-    <UseMaui>true</UseMaui>
-    <SingleProject>true</SingleProject>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-
-    <ApplicationTitle>VideoStudy</ApplicationTitle>
-    <ApplicationId>com.companyname.videostudy</ApplicationId>
-    <ApplicationDisplayVersion>1.0</ApplicationDisplayVersion>
-    <ApplicationVersion>1</ApplicationVersion>
-    <WindowsPackageType>None</WindowsPackageType>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <MauiIcon Include="Resources\AppIcon\appicon.svg" ForegroundFile="Resources\AppIcon\appiconfg.svg" Color="#512BD4" />
-    <MauiSplashScreen Include="Resources\Splash\splash.svg" Color="#512BD4" BaseSize="128,128" />
-    <MauiImage Include="Resources\Images\*" />
-    <MauiFont Include="Resources\Fonts\*" />
-    <MauiAsset Include="Resources\Raw\**" LogicalName="%(RecursiveDir)%(Filename)%(Extension)" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.Maui.Controls" Version="10.0.31" />
-    <PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="10.0.31" />
-    <PackageReference Include="Microsoft.AspNetCore.Components.WebView.Maui" Version="10.0.31" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="10.0.0" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\VideoStudy.UI\VideoStudy.UI.csproj" />
-    <ProjectReference Include="..\VideoStudy.Shared\VideoStudy.Shared.csproj" />
-  </ItemGroup>
-
-</Project>

VideoStudy.Native/wwwroot/index.html

@@ -1,31 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="utf-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover" />
-    <title>VideoStudy.Native</title>
-    <base href="/" />
-    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" />
-    <link rel="stylesheet" href="_content/VideoStudy.UI/app.css" />
-</head>
-
-<body>
-
-    <div id="app">
-        <div style="position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);">
-            <div class="spinner-border text-primary" role="status"></div>
-            <div style="margin-top:10px;">Carregando VideoStudy...</div>
-        </div>
-    </div>
-
-    <div id="blazor-error-ui">
-        An unhandled error has occurred.
-        <a href="" class="reload">Reload</a>
-        <a class="dismiss">🗙</a>
-    </div>
-
-    <script src="_framework/blazor.webview.js"></script>
-
-</body>
-
-</html>

VideoStudy.Shared/Models.cs

@@ -8,9 +8,10 @@ public class AnalysisRequest
     public string VideoUrl { get; set; } = string.Empty;
     public string Language { get; set; } = "en"; // Input language (subtitles)
     public string? OutputLanguage { get; set; } // Output language (tutorial). null = same as Language
-    public string Mode { get; set; } = "fast"; // fast or advanced
-    public string? TranscriptText { get; set; } // Optional: if client already transcribed it
+    public string Mode { get; set; } = "fast";
     public double DurationSeconds { get; set; }
+    // Contexto livre do usuário: "tutorial técnico de Python", "aula de física escolar", etc.
+    public string? UserContext { get; set; }
 }
 
 /// <summary>
@@ -101,10 +102,6 @@ public class DownloadProgress
     public string Status { get; set; } = string.Empty;
 }
 
-public interface IPdfSaver
-{
-    Task<string?> SavePdfAsync(byte[] pdfData, string suggestedFileName);
-}
 
 /// <summary>
 /// A single event in the analysis stream.

VideoStudy.Shared/Services/HardwareIdService.cs

@@ -1,69 +0,0 @@
-using System.Runtime.InteropServices;
-using System.Security.Cryptography;
-using System.Text;
-
-namespace VideoStudy.Shared.Services;
-
-public interface IHardwareIdService
-{
-    string GetHardwareId();
-}
-
-public class HardwareIdService : IHardwareIdService
-{
-    public string GetHardwareId()
-    {
-        try
-        {
-            string rawId;
-            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-                rawId = GetWindowsHardwareId();
-            else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
-                rawId = GetMacOSHardwareId();
-            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
-                rawId = GetLinuxHardwareId();
-            else
-                rawId = "UNKNOWN_PLATFORM_" + Environment.MachineName;
-
-            return ComputeSHA256(rawId);
-        }
-        catch
-        {
-            // Fallback for permissions issues
-            return ComputeSHA256(Environment.MachineName + Environment.UserName);
-        }
-    }
-
-    private string GetWindowsHardwareId()
-    {
-        // Simple fallback to MachineName + ProcessorCount to avoid System.Management dependency in Shared
-        return Environment.MachineName + Environment.ProcessorCount;
-    }
-
-    private string GetMacOSHardwareId()
-    {
-        // Ideally use 'system_profiler SPHardwareDataType'
-        return Environment.MachineName; 
-    }
-
-    private string GetLinuxHardwareId()
-    {
-        // Try reading machine-id
-        try
-        {
-            if (File.Exists("/etc/machine-id"))
-                return File.ReadAllText("/etc/machine-id").Trim();
-            if (File.Exists("/var/lib/dbus/machine-id"))
-                return File.ReadAllText("/var/lib/dbus/machine-id").Trim();
-        }
-        catch {}
-        return Environment.MachineName;
-    }
-
-    private string ComputeSHA256(string rawData)
-    {
-        using var sha256 = SHA256.Create();
-        var bytes = sha256.ComputeHash(Encoding.UTF8.GetBytes(rawData));
-        return BitConverter.ToString(bytes).Replace("-", "").ToLower();
-    }
-}

VideoStudy.UI/App.razor

@@ -1,26 +1 @@
-<!DOCTYPE html>
-<html lang="en">
-
-<head>
-    <meta charset="utf-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <base href="/" />
-
-    <!-- Bootstrap 5.3.2 CSS -->
-    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet">
-
-    <link rel="stylesheet" href="app.css" />
-    <link rel="stylesheet" href="VideoStudy.Desktop.styles.css" />
-    <HeadOutlet />
-</head>
-
-<body>
-    <Routes />
-
-    <!-- Bootstrap 5.3.2 JS -->
-    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"></script>
-
-    <script src="_framework/blazor.web.js"></script>
-</body>
-
-</html>
+<Routes />

VideoStudy.UI/Components/YouTubeProcessor.razor

@@ -0,0 +1,37 @@
+@using VideoStudy.Shared
+
+<div class="processor-card p-2">
+    <div class="mb-3">
+        <label class="form-label fw-bold text-muted small">URL do YouTube</label>
+        <input type="text" class="form-control form-control-lg"
+               placeholder="https://www.youtube.com/watch?v=..."
+               @bind="VideoUrl" @bind:event="oninput"
+               @onchange="OnUrlChanged"
+               disabled="@IsProcessing" />
+    </div>
+
+    @if (VideoInfo != null)
+    {
+        <div class="p-3 bg-light rounded-3">
+            <div class="fw-bold">@VideoInfo.Title</div>
+            <div class="d-flex gap-3 text-muted small mt-1">
+                <span>@VideoInfo.Author</span>
+                <span>@VideoInfo.Duration.ToString(@"hh\:mm\:ss")</span>
+            </div>
+        </div>
+    }
+</div>
+
+@code {
+    [Parameter] public EventCallback<string> OnVideoUrlChanged { get; set; }
+    [Parameter] public bool IsProcessing { get; set; }
+    [Parameter] public VideoInfo? VideoInfo { get; set; }
+
+    private string VideoUrl { get; set; } = "";
+
+    private async Task OnUrlChanged(ChangeEventArgs e)
+    {
+        VideoUrl = e.Value?.ToString() ?? "";
+        await OnVideoUrlChanged.InvokeAsync(VideoUrl);
+    }
+}

VideoStudy.UI/Layout/MainLayout.razor

@@ -6,22 +6,12 @@
     </div>
 
     <main>
-        <div class="top-row px-4">
-            <a href="https://github.com/microsoft/semantic-kernel" target="_blank">About Semantic Kernel</a>
-        </div>
-
         <article class="content px-4">
             @Body
         </article>
     </main>
 </div>
 
-<div id="blazor-error-ui">
-    An unhandled error has occurred.
-    <a href="" class="reload">Reload</a>
-    <a class="dismiss">🗙</a>
-</div>
-
 <style>
     .page {
         position: relative;
@@ -29,84 +19,15 @@
         flex-direction: column;
     }
 
-    main {
-        flex: 1;
-    }
+    main { flex: 1; }
 
     .sidebar {
         background-image: linear-gradient(180deg, rgb(5, 39, 103) 0%, #3a0647 70%);
     }
 
-    .sidebar .top-row {
-        background-color: rgba(0,0,0,0.25);
-        border-bottom: none;
-    }
-
-    .top-row {
-        background-color: #f7f7f7;
-        border-bottom: 1px solid #d6d5d5;
-        justify-content: flex-end;
-        height: 3.5rem;
-        display: flex;
-        align-items: center;
-    }
-
-        .top-row ::deep a, .top-row ::deep .btn-link {
-            white-space: nowrap;
-            margin-left: 1.5rem;
-            text-decoration: none;
-        }
-
-        .top-row ::deep a:hover, .top-row ::deep .btn-link:hover {
-            text-decoration: underline;
-        }
-
-        .top-row ::deep a:first-child {
-            overflow: hidden;
-            text-overflow: ellipsis;
-        }
-
-    @@media (max-width: 640.98px) {
-        .top-row:not(.auth) {
-            display: none;
-        }
-
-        .top-row.auth {
-            justify-content: space-between;
-        }
-
-        .top-row ::deep a, .top-row ::deep .btn-link {
-            margin-left: 0;
-        }
-    }
-
     @@media (min-width: 641px) {
-        .page {
-            flex-direction: row;
-        }
-
-        .sidebar {
-            width: 250px;
-            height: 100vh;
-            position: sticky;
-            top: 0;
-        }
-
-        .top-row {
-            position: sticky;
-            top: 0;
-            z-index: 1;
-        }
-
-        .top-row.auth ::deep a:first-child {
-            flex: 1;
-            text-align: right;
-            width: 0;
-        }
-
-        .top-row, article {
-            padding-left: 2rem !important;
-            padding-right: 1.5rem !important;
-        }
+        .page { flex-direction: row; }
+        .sidebar { width: 250px; height: 100vh; position: sticky; top: 0; }
+        article { padding-left: 2rem !important; padding-right: 1.5rem !important; }
     }
 </style>

VideoStudy.UI/Pages/Home.razor

@@ -1,158 +1,81 @@
 @page "/"
 @inject HttpClient Http
-@inject IPdfSaver PdfSaver
+@inject YouTubeService YouTubeService
+@inject PersistenceService PersistenceService
+@inject NavigationManager NavigationManager
 @using VideoStudy.Shared
 @using System.Net.Http.Json
 @using System.Text.Json
-@using System.Threading // Added for Cancellation
+@using System.Threading
 
-<PageTitle>VideoStudy - Video Analysis</PageTitle>
+<PageTitle>VideoStudy</PageTitle>
 
 <div class="container-fluid py-4">
-    <!-- Header -->
     <header class="text-center mb-5">
         <h1 class="display-4 fw-bold" style="background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent;">
-            VideoStudy (Native)
+            VideoStudy
         </h1>
-        <p class="lead text-muted">Transforme videos em apostilas inteligentes com IA</p>
+        <p class="lead text-muted">Transforme vídeos em guias de estudo com IA</p>
     </header>
 
     <div class="row">
         <div class="col-lg-8 mx-auto">
 
-            <!-- Tabs Navigation -->
-            <ul class="nav nav-pills nav-fill mb-4 shadow-sm p-1 bg-light rounded-pill">
-                <li class="nav-item">
-                    <button class="nav-link rounded-pill py-3 fw-bold @(activeTab == "youtube" ? "active bg-primary text-white" : "text-muted")"
-                            @onclick="@(() => activeTab = "youtube")" disabled="@(isProcessing || isFetchingInfo)">
-                        <span style="font-size:1.1rem;">YouTube Video</span>
-                    </button>
-                </li>
-                <li class="nav-item">
-                    <button class="nav-link rounded-pill py-3 fw-bold text-muted" disabled>
-                        Local Video (Coming Soon)
-                    </button>
-                </li>
-            </ul>
+            <div class="card shadow-sm border-0 rounded-4 overflow-hidden mb-4 p-4 bg-white">
+                <YouTubeProcessor
+                    OnVideoUrlChanged="HandleVideoUrlChanged"
+                    IsProcessing="@isProcessing"
+                    VideoInfo="@currentVideoInfo" />
 
-            <!-- Tab Content -->
-            <div class="card shadow-soft border-0 rounded-4 overflow-hidden mb-4 p-4 bg-white">
-                @if (activeTab == "youtube")
-                {
-                    <div class="mb-4">
-                        <label class="form-label fw-bold text-muted small">YouTube URL</label>
-                        <div class="input-group mb-3">
-                            <input type="text" class="form-control form-control-lg" placeholder="https://www.youtube.com/watch?v=..."
-                                   @bind="videoUrl" disabled="@(isProcessing || isFetchingInfo)" />
+                <div class="mt-3">
+                    <label class="form-label fw-bold text-muted small">
+                        Contexto <span class="fw-normal">(opcional)</span>
+                    </label>
+                    <textarea class="form-control" rows="2"
+                              placeholder="Ex: tutorial técnico de Python para iniciantes / aula escolar sobre fotossíntese / passo a passo para montar um móvel"
+                              @bind="userContext" disabled="@isProcessing"></textarea>
                 </div>
-                    </div>
-                }
 
-                <!-- Video Info Preview -->
-                @if (videoInfo != null)
-                {
-                    <div class="border rounded-3 p-3 mb-4 d-flex align-items-start gap-3" style="background: #f0f4ff;">
-                        @if (!string.IsNullOrEmpty(videoInfo.ThumbnailUrl))
-                        {
-                            <img src="@videoInfo.ThumbnailUrl" alt="Thumbnail"
-                                 style="width: 180px; border-radius: 8px; flex-shrink: 0;" />
-                        }
-                        <div class="flex-grow-1">
-                            <h6 class="fw-bold mb-1">@videoInfo.Title</h6>
-                            <div class="text-muted small">
-                                <span class="me-3">@videoInfo.Author</span>
-                                <span>@videoInfo.Duration.ToString(@"hh\:mm\:ss")</span>
-                            </div>
-                        </div>
-                        <button class="btn btn-sm btn-outline-secondary" @onclick="ClearVideoInfo"
-                                disabled="@(isProcessing)" title="Limpar">X</button>
-                    </div>
-                }
-
-                <!-- Language Selectors -->
-                <div class="row g-3">
-                    <div class="col-md-6">
-                        <label class="form-label fw-bold text-muted small">Idioma do Video (Legendas)</label>
-                        <select class="form-select" @bind="selectedLanguage" disabled="@(isProcessing || isFetchingInfo)">
+                <div class="row g-3 mt-2">
+                    <div class="col-md-12">
+                        <label class="form-label fw-bold text-muted small">Idioma de saída</label>
+                        <select class="form-select" @bind="selectedLanguage" disabled="@isProcessing">
+                            <option value="pt">Português (BR)</option>
                             <option value="en">English</option>
-                            <option value="pt">Portuguese (BR)</option>
-                            <option value="es">Spanish</option>
-                            <option value="fr">French</option>
-                            <option value="de">German</option>
-                            <option value="ja">Japanese</option>
-                            <option value="ko">Korean</option>
-                        </select>
-                    </div>
-                    <div class="col-md-6">
-                        <label class="form-label fw-bold text-muted small">Idioma de Saida (Tutorial)</label>
-                        <select class="form-select" @bind="selectedOutputLanguage" disabled="@(isProcessing || isFetchingInfo)">
-                            <option value="pt">Portuguese (BR)</option>
-                            <option value="en">English</option>
-                            <option value="es">Spanish</option>
-                            <option value="fr">French</option>
-                            <option value="de">German</option>
+                            <option value="es">Español</option>
+                            <option value="fr">Français</option>
                         </select>
                     </div>
                 </div>
 
-                <!-- Action Buttons -->
-                <div class="mt-4">
-                    @if (videoInfo == null)
-                    {
-                        <!-- Step 1: Fetch video info -->
-                        <button class="btn btn-lg btn-primary w-100 py-3 fw-bold shadow-sm"
-                                @onclick="FetchVideoInfo"
-                                disabled="@(isProcessing || isFetchingInfo || string.IsNullOrWhiteSpace(videoUrl))">
-                            @if (isFetchingInfo)
-                            {
-                                <span class="spinner-border spinner-border-sm me-2"></span>
-                                <span>Verificando video...</span>
-                            }
-                            else
-                            {
-                                <span>Generate Tutorial PDF</span>
-                            }
-                        </button>
-                    }
-                    else
-                    {
-                        <!-- Step 2: Confirm and generate -->
-                        <div class="d-flex gap-2">
-                            <button class="btn btn-lg btn-success flex-grow-1 py-3 fw-bold shadow-sm"
-                                    @onclick="StartAnalysis"
-                                    disabled="@isProcessing">
+                <div class="d-grid mt-4">
+                    <button class="btn btn-lg btn-primary" @onclick="StartAnalysis"
+                            disabled="@(isProcessing || string.IsNullOrWhiteSpace(videoUrl))">
                         @if (isProcessing)
                         {
                             <span class="spinner-border spinner-border-sm me-2"></span>
-                                    <span>Gerando PDF...</span>
+                            <span>Analisando...</span>
                         }
                         else
                         {
-                                    <span>Confirmar e Gerar PDF</span>
+                            <span>Analisar com IA</span>
                         }
                     </button>
                 </div>
-                    }
-                </div>
             </div>
 
-            <!-- Progress Indicator -->
             @if (isProcessing || currentStep > 0)
             {
-                <div class="progress mb-3" style="height: 25px;">
-                    <div class="progress-bar progress-bar-striped progress-bar-animated bg-success" role="progressbar" style="width: @(progress)%">
-                        @statusMessage
-                    </div>
-                </div>
+                <ProgressIndicator Status="@statusMessage" Percent="@progress" CurrentStepIndex="@currentStep" />
             }
 
-            <!-- Logs (Collapsible) -->
             @if (logs.Count > 0)
             {
                 <div class="card shadow-sm mb-4 border-0 rounded-4 overflow-hidden">
-                    <div class="card-header bg-dark text-white d-flex justify-content-between align-items-center" style="cursor: pointer;" @onclick="ToggleLogs">
-                        <small class="fw-bold">Execution Logs</small>
-                        <small>@logs.Count items @(showLogs ? "v" : ">")</small>
+                    <div class="card-header bg-dark text-white d-flex justify-content-between align-items-center"
+                         style="cursor: pointer;" @onclick="ToggleLogs">
+                        <small class="fw-bold">Log de execução</small>
+                        <small>@logs.Count eventos @(showLogs ? "▼" : "▶")</small>
                     </div>
                     @if (showLogs)
                     {
@@ -160,7 +83,7 @@
                             @foreach (var log in logs)
                             {
                                 <div class="text-dark border-bottom py-1">
-                                    <span class="text-muted">[@log.Timestamp:HH:mm:ss]</span> @log.Message
+                                    <span class="text-muted">[@log.Timestamp.ToString("HH:mm:ss")]</span> @log.Message
                                 </div>
                             }
                         </div>
@@ -168,33 +91,28 @@
                 </div>
             }
 
+            @if (!string.IsNullOrEmpty(generatedPdfPath))
+            {
+                <PdfPreview PdfPath="@generatedPdfPath" OnCancel="@(() => generatedPdfPath = null)" />
+            }
+
         </div>
     </div>
 </div>
 
-<style>
-    .nav-pills .nav-link.active {
-        box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
-    }
-    .shadow-soft {
-        box-shadow: 0 10px 30px rgba(0,0,0,0.05);
-    }
-</style>
-
 @code {
-    private string activeTab = "youtube";
     private bool isProcessing = false;
-    private bool isFetchingInfo = false;
     private int progress = 0;
     private int currentStep = 0;
-    private string statusMessage = "Ready";
+    private string statusMessage = "Pronto";
     private bool showLogs = false;
     private List<LogEntry> logs = new();
 
     private string videoUrl = string.Empty;
-    private string selectedLanguage = "en";
-    private string selectedOutputLanguage = "pt";
-    private VideoInfo? videoInfo;
+    private string selectedLanguage = "pt";
+    private string? userContext;
+    private VideoInfo? currentVideoInfo;
+    private string? generatedPdfPath;
 
     private class LogEntry
     {
@@ -207,46 +125,15 @@
     private void AddLog(string message, int? eventProgress = null)
     {
         logs.Insert(0, new LogEntry { Message = message });
+        if (logs.Count > 100) logs.RemoveAt(logs.Count - 1);
         if (eventProgress.HasValue) progress = eventProgress.Value;
         StateHasChanged();
     }
 
-    private void ClearVideoInfo()
+    private void HandleVideoUrlChanged(string url)
     {
-        videoInfo = null;
-    }
-
-    private async Task FetchVideoInfo()
-    {
-        if (string.IsNullOrWhiteSpace(videoUrl)) return;
-        isFetchingInfo = true;
-        showLogs = true;
-
-        try
-        {
-            AddLog("Buscando informacoes do video...");
-            var response = await Http.GetAsync($"api/video-info?url={Uri.EscapeDataString(videoUrl)}");
-
-            if (!response.IsSuccessStatusCode)
-            {
-                var error = await response.Content.ReadAsStringAsync();
-                throw new Exception($"API Error: {error}");
-            }
-
-            videoInfo = await response.Content.ReadFromJsonAsync<VideoInfo>(
-                new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
-
-            if (videoInfo != null)
-                AddLog($"Video encontrado: {videoInfo.Title} ({videoInfo.Duration:hh\\:mm\\:ss})");
-        }
-        catch (Exception ex)
-        {
-            AddLog($"Erro: {ex.Message}");
-        }
-        finally
-        {
-            isFetchingInfo = false;
-        }
+        videoUrl = url;
+        currentVideoInfo = null;
     }
 
     private async Task StartAnalysis()
@@ -254,6 +141,7 @@
         isProcessing = true;
         progress = 0;
         currentStep = 0;
+        generatedPdfPath = null;
         logs.Clear();
         showLogs = true;
 
@@ -261,90 +149,86 @@
 
         try
         {
+            cts = new CancellationTokenSource();
+            var token = cts.Token;
+
+            // Buscar info do vídeo antes de iniciar
             currentStep = 1;
+            statusMessage = "Buscando informações do vídeo...";
+            AddLog($"Verificando URL: {videoUrl}", 2);
+            try
+            {
+                currentVideoInfo = await YouTubeService.GetVideoInfoAsync(videoUrl);
+                AddLog($"Vídeo encontrado: {currentVideoInfo.Title}", 5);
+            }
+            catch (Exception ex)
+            {
+                throw new Exception($"Não foi possível obter informações do vídeo: {ex.Message}");
+            }
+
             statusMessage = "Iniciando análise...";
-            AddLog("🚀 Enviando requisição para a API...", 5);
+            AddLog("Enviando para o servidor...", 8);
 
             var request = new AnalysisRequest
             {
                 VideoUrl = videoUrl,
-                Language = selectedLanguage,
-                OutputLanguage = selectedOutputLanguage,
-                Mode = "native"
+                Mode = "fast",
+                Language = "en",
+                OutputLanguage = selectedLanguage,
+                DurationSeconds = currentVideoInfo?.Duration.TotalSeconds ?? 0,
+                UserContext = string.IsNullOrWhiteSpace(userContext) ? null : userContext.Trim()
             };
 
-            cts = new CancellationTokenSource();
-            var cancellationToken = cts.Token;
-
-            var httpRequestMessage = new HttpRequestMessage(HttpMethod.Post, "api/analyze")
+            var httpRequest = new HttpRequestMessage(HttpMethod.Post, "api/analyze")
             {
                 Content = JsonContent.Create(request)
             };
 
-            using var response = await Http.SendAsync(httpRequestMessage, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
+            using var response = await Http.SendAsync(httpRequest, HttpCompletionOption.ResponseHeadersRead, token);
+            response.EnsureSuccessStatusCode();
 
-            if (!response.IsSuccessStatusCode)
+            var stream = response.Content.ReadFromJsonAsAsyncEnumerable<AnalysisEvent>(
+                new JsonSerializerOptions { PropertyNameCaseInsensitive = true }, token);
+
+            await foreach (var ev in stream.WithCancellation(token))
             {
-                var error = await response.Content.ReadAsStringAsync();
-                throw new Exception($"API Error ({response.StatusCode}): {error}");
-            }
+                if (ev == null) continue;
+                if (ev.IsError) throw new Exception(ev.Message);
 
-            var stream = response.Content.ReadFromJsonAsAsyncEnumerable<AnalysisEvent>(new JsonSerializerOptions { PropertyNameCaseInsensitive = true }, cancellationToken);
-
-            await foreach (var analysisEvent in stream.WithCancellation(cancellationToken))
-            {
-                if (analysisEvent == null) continue;
-
-                if (analysisEvent.IsError)
-                {
-                    throw new Exception($"Erro da API: {analysisEvent.Message}");
-                }
-
-                AddLog(analysisEvent.Message, analysisEvent.ProgressPercentage);
-                statusMessage = analysisEvent.Message;
-                progress = analysisEvent.ProgressPercentage;
+                AddLog(ev.Message, ev.ProgressPercentage);
+                statusMessage = ev.Message;
                 StateHasChanged();
 
-                if (analysisEvent.Result != null)
+                if (ev.Result != null)
                 {
-                    var result = analysisEvent.Result;
-                    AddLog("✅ Análise concluída!", 100);
-                    statusMessage = "Pronto!";
+                    AddLog("Análise concluída!", 100);
 
-                    if (result.PdfData != null && result.PdfData.Length > 0)
+                    if (ev.Result.PdfData != null && ev.Result.PdfData.Length > 0)
                     {
-                        AddLog("Salvando PDF...");
-                        var fileName = $"VideoStudy_{result.VideoTitle ?? "Tutorial"}_{DateTime.Now:yyyyMMdd_HHmmss}.pdf";
-                        // Remove invalid filename chars
-                        fileName = string.Join("_", fileName.Split(Path.GetInvalidFileNameChars()));
-                        var savedPath = await PdfSaver.SavePdfAsync(result.PdfData, fileName);
-                        if (savedPath != null)
-                            AddLog($"✓ PDF salvo: {savedPath}");
-                        else
-                            AddLog("⚠️ Salvamento do PDF cancelado pelo usuário");
-                    }
-                    else
-                    {
-                        AddLog("⚠️ Nenhum dado de PDF retornado da API");
+                        AddLog("Salvando PDF na biblioteca...", 100);
+                        var session = await PersistenceService.SaveSessionAsync(
+                            ev.Result.PdfData,
+                            ev.Result.DocumentTitle,
+                            videoUrl);
+
+                        generatedPdfPath = session.FilePath;
+                        AddLog($"PDF salvo em: {session.FilePath}", 100);
+
+                        await Task.Delay(2000);
+                        NavigationManager.NavigateTo("library");
                     }
                     break;
                 }
             }
         }
-        catch (OperationCanceledException)
-        {
-            AddLog("⏸️ Operação cancelada.");
-            statusMessage = "Cancelado";
-        }
         catch (Exception ex)
         {
-            AddLog($"❌ Erro: {ex.Message}");
-            statusMessage = "Erro";
+            AddLog($"Erro: {ex.Message}");
+            statusMessage = "Erro na análise";
         }
         finally
         {
             isProcessing = false;
-            videoInfo = null;
             cts?.Dispose();
         }
     }

VideoStudy.UI/Pages/Library.razor

@@ -1,5 +1,5 @@
 @page "/library"
-@inject VideoStudy.Shared.Services.PersistenceService PersistenceService
+@inject PersistenceService PersistenceService
 @using VideoStudy.Shared
 @using System.Diagnostics
 

VideoStudy.UI/ServiceCollectionExtensions.cs

@@ -0,0 +1,14 @@
+using Microsoft.Extensions.DependencyInjection;
+using VideoStudy.UI.Services;
+
+namespace VideoStudy.UI;
+
+public static class ServiceCollectionExtensions
+{
+    public static IServiceCollection AddVideoStudyUI(this IServiceCollection services)
+    {
+        services.AddScoped<YouTubeService>();
+        services.AddScoped<PersistenceService>();
+        return services;
+    }
+}

VideoStudy.UI/Services/PersistenceService.cs

@@ -1,7 +1,7 @@
 using LiteDB;
 using VideoStudy.Shared;
 
-namespace VideoStudy.Shared.Services;
+namespace VideoStudy.UI.Services;
 
 public class PersistenceService
 {
@@ -10,8 +10,6 @@ public class PersistenceService
 
     public PersistenceService()
     {
-        // Define a pasta base em %USERPROFILE%/MeuVideoStudy
-        // Funciona em Windows, macOS e Linux (limitado pelo ambiente MAUI)
         _basePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "MeuVideoStudy");
         _dbPath = Path.Combine(_basePath, "videostudy.db");
 
@@ -23,22 +21,14 @@ public class PersistenceService
 
     public string GetBasePath() => _basePath;
 
-    /// <summary>
-    /// Retorna as subpastas físicas dentro do diretório base.
-    /// </summary>
     public List<string> GetFolders()
     {
-        if (!Directory.Exists(_basePath)) return new List<string>();
-        
         return Directory.GetDirectories(_basePath)
                         .Select(Path.GetFileName)
                         .Where(name => name != null)
                         .ToList()!;
     }
 
-    /// <summary>
-    /// Cria uma nova pasta física.
-    /// </summary>
     public void CreateFolder(string folderName)
     {
         var path = Path.Combine(_basePath, folderName);
@@ -48,27 +38,30 @@ public class PersistenceService
         }
     }
 
-    /// <summary>
-    /// Salva o PDF no disco e registra no LiteDB.
-    /// </summary>
+    public void RenameFolder(string oldName, string newName)
+    {
+        var oldPath = Path.Combine(_basePath, oldName);
+        var newPath = Path.Combine(_basePath, newName);
+        if (Directory.Exists(oldPath) && !Directory.Exists(newPath))
+        {
+            Directory.Move(oldPath, newPath);
+        }
+    }
+
     public async Task<VideoStudySession> SaveSessionAsync(byte[] pdfData, string title, string? youtubeId, string folderName = "Geral")
     {
-        // Garantir que a pasta existe
         var folderPath = Path.Combine(_basePath, folderName);
         if (!Directory.Exists(folderPath))
         {
             Directory.CreateDirectory(folderPath);
         }
 
-        // Criar nome de arquivo seguro
         var safeTitle = string.Join("_", title.Split(Path.GetInvalidFileNameChars()));
         var fileName = $"{safeTitle}_{DateTime.Now:yyyyMMdd_HHmmss}.pdf";
         var filePath = Path.Combine(folderPath, fileName);
 
-        // Gravar arquivo físico
         await File.WriteAllBytesAsync(filePath, pdfData);
 
-        // Registrar no LiteDB
         using var db = new LiteDatabase(_dbPath);
         var collection = db.GetCollection<VideoStudySession>("sessions");
 
@@ -87,9 +80,6 @@ public class PersistenceService
         return session;
     }
 
-    /// <summary>
-    /// Recupera todas as sessões do banco.
-    /// </summary>
     public List<VideoStudySession> GetAllSessions()
     {
         using var db = new LiteDatabase(_dbPath);
@@ -98,4 +88,13 @@ public class PersistenceService
                  .OrderByDescending(x => x.CreatedAt)
                  .ToList();
     }
+
+    public List<VideoStudySession> GetSessionsByFolder(string folderName)
+    {
+        using var db = new LiteDatabase(_dbPath);
+        return db.GetCollection<VideoStudySession>("sessions")
+                 .Find(x => x.FolderName == folderName)
+                 .OrderByDescending(x => x.CreatedAt)
+                 .ToList();
+    }
 }

VideoStudy.UI/Services/YouTubeService.cs

@@ -0,0 +1,21 @@
+using System.Net.Http.Json;
+using VideoStudy.Shared;
+
+namespace VideoStudy.UI.Services;
+
+public class YouTubeService
+{
+    private readonly HttpClient _httpClient;
+
+    public YouTubeService(HttpClient httpClient)
+    {
+        _httpClient = httpClient;
+    }
+
+    public async Task<VideoInfo> GetVideoInfoAsync(string url)
+    {
+        var encodedUrl = Uri.EscapeDataString(url);
+        var info = await _httpClient.GetFromJsonAsync<VideoInfo>($"api/video-info?url={encodedUrl}");
+        return info ?? throw new Exception("Não foi possível obter informações do vídeo.");
+    }
+}

VideoStudy.UI/VideoStudy.UI.csproj

@@ -1,13 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net10.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <Platforms>AnyCPU;x64</Platforms>
   </PropertyGroup>
 
-
   <ItemGroup>
     <SupportedPlatform Include="browser" />
   </ItemGroup>
@@ -16,12 +15,17 @@
     <PackageReference Include="Microsoft.AspNetCore.Components.Web" Version="8.0.22" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
+    <PackageReference Include="Microsoft.AspNetCore.Components.Web" Version="9.0.5" />
+  </ItemGroup>
+
   <ItemGroup Condition="'$(TargetFramework)' == 'net10.0'">
     <PackageReference Include="Microsoft.AspNetCore.Components.Web" Version="10.0.0" />
   </ItemGroup>
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Http" Version="10.0.2" />
+    <PackageReference Include="LiteDB" Version="5.0.21" />
   </ItemGroup>
 
   <ItemGroup>

VideoStudy.UI/_Imports.razor

@@ -9,4 +9,6 @@
 @using VideoStudy.UI
 @using VideoStudy.UI.Layout
 @using VideoStudy.UI.Pages
+@using VideoStudy.UI.Components
+@using VideoStudy.UI.Services
 @using VideoStudy.Shared

VideoStudy.sln

@@ -7,80 +7,72 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VideoStudy.Shared", "VideoS
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VideoStudy.API", "VideoStudy.API\VideoStudy.API.csproj", "{022CD193-2FB4-4507-BAA2-56DB7A40841E}"
 EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "VideoStudy.Desktop", "VideoStudy.Desktop", "{A245341F-91C7-4FC3-9EB8-FC6455180427}"
-EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VideoStudy.Desktop", "VideoStudy.Desktop\VideoStudy.Desktop\VideoStudy.Desktop.csproj", "{0E1E304A-DEC7-4704-BCE8-65A4DACE00BC}"
-EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VideoStudy.Desktop.Client", "VideoStudy.Desktop\VideoStudy.Desktop.Client\VideoStudy.Desktop.Client.csproj", "{59672094-7BE6-4CB2-8401-59D59D8AF07A}"
-EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VideoStudy.UI", "VideoStudy.UI\VideoStudy.UI.csproj", "{CE82389C-E484-4EAC-8F78-0FB5C6EB63A4}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VideoStudy.Native", "VideoStudy.Native\VideoStudy.Native.csproj", "{0387DAAC-724C-43D1-9C68-D8383F05E909}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VideoStudy.App", "VideoStudy.App\VideoStudy.App.csproj", "{D6ABA32E-D5C0-4E94-8E1C-2E6B2C83519E}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
 		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
 		Release|Any CPU = Release|Any CPU
 		Release|x64 = Release|x64
+		Release|x86 = Release|x86
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
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 		{C2F5E2F7-0872-422B-B246-A9EC585AF3CC}.Debug|x64.Build.0 = Debug|x64
+		{C2F5E2F7-0872-422B-B246-A9EC585AF3CC}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{C2F5E2F7-0872-422B-B246-A9EC585AF3CC}.Debug|x86.Build.0 = Debug|Any CPU
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+		{022CD193-2FB4-4507-BAA2-56DB7A40841E}.Release|x86.ActiveCfg = Release|Any CPU
+		{022CD193-2FB4-4507-BAA2-56DB7A40841E}.Release|x86.Build.0 = Release|Any CPU
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+		{CE82389C-E484-4EAC-8F78-0FB5C6EB63A4}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{CE82389C-E484-4EAC-8F78-0FB5C6EB63A4}.Debug|x86.Build.0 = Debug|Any CPU
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-		{0387DAAC-724C-43D1-9C68-D8383F05E909}.Release|x64.Build.0 = Release|x64
+		{CE82389C-E484-4EAC-8F78-0FB5C6EB63A4}.Release|x86.ActiveCfg = Release|Any CPU
+		{CE82389C-E484-4EAC-8F78-0FB5C6EB63A4}.Release|x86.Build.0 = Release|Any CPU
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+		{D6ABA32E-D5C0-4E94-8E1C-2E6B2C83519E}.Debug|x64.Build.0 = Debug|x64
+		{D6ABA32E-D5C0-4E94-8E1C-2E6B2C83519E}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{D6ABA32E-D5C0-4E94-8E1C-2E6B2C83519E}.Debug|x86.Build.0 = Debug|Any CPU
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+		{D6ABA32E-D5C0-4E94-8E1C-2E6B2C83519E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D6ABA32E-D5C0-4E94-8E1C-2E6B2C83519E}.Release|x64.ActiveCfg = Release|x64
+		{D6ABA32E-D5C0-4E94-8E1C-2E6B2C83519E}.Release|x64.Build.0 = Release|x64
+		{D6ABA32E-D5C0-4E94-8E1C-2E6B2C83519E}.Release|x86.ActiveCfg = Release|Any CPU
+		{D6ABA32E-D5C0-4E94-8E1C-2E6B2C83519E}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
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-		{0E1E304A-DEC7-4704-BCE8-65A4DACE00BC} = {A245341F-91C7-4FC3-9EB8-FC6455180427}
-		{59672094-7BE6-4CB2-8401-59D59D8AF07A} = {A245341F-91C7-4FC3-9EB8-FC6455180427}
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 		SolutionGuid = {68B75065-924C-42D1-8B6C-A4B5678C2A85}
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