fix: Mejora parser de tablas LaTeX

- Elimina líneas hline duplicadas
- Mejora limpieza de comandos LaTeX en celdas
- Usa regex para manejar {contenido}
- Filtra celdas vacías

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

services/pdf_generator.py

@@ -94,13 +94,20 @@ class PDFGenerator:
                 break
 
             if in_table:
+                # Saltar líneas de hline
+                if "hline" in line.replace("\\", "").replace(" ", ""):
+                    i += 1
+                    continue
+
                 # Procesar línea de tabla
-                # Reemplazar & por separador y eliminar \\
-                row_data = line.replace("&", "|").replace("\\", "").replace("\\\\", "")
-                # Limpiar formato LaTeX básico
-                row_data = row_data.replace("hline", "").replace("\\hline", "")
+                # Reemplazar & por separador
+                row_data = line.replace("&", "|")
+                # Eliminar comandos LaTeX
+                row_data = row_data.replace("\\", "").replace("\\\\", "").replace("hline", "")
                 cells = [c.strip() for c in row_data.split("|") if c.strip()]
-                if cells:
+                # Filtrar celdas vacías
+                cells = [c for c in cells if c and c != "|"]
+                if cells and len(cells) > 1:  # Al menos 2 columnas para ser tabla válida
                     table_lines.append({"type": "row", "data": cells})
 
             i += 1
@@ -118,11 +125,15 @@ class PDFGenerator:
                 row = []
                 for cell in tl["data"]:
                     cell = cell.strip()
-                    # Eliminar comandos LaTeX restantes
-                    cell = cell.replace("\\textbf{", "").replace("}", "")
-                    cell = cell.replace("\\textit{", "")
-                    cell = cell.replace("\\emph{", "")
+                    # Eliminar comandos LaTeX restantes (manejar {contenido})
+                    import re
+                    # Eliminar \textbf{...}, \textit{...}, \emph{...}
+                    cell = re.sub(r'\\textbf\{([^}]*)\}', r'\1', cell)
+                    cell = re.sub(r'\\textit\{([^}]*)\}', r'\1', cell)
+                    cell = re.sub(r'\\emph\{([^}]*)\}', r'\1', cell)
+                    cell = cell.replace("\\", "").replace("{", "").replace("}", "")
                     cell = cell.strip()
+                    if cell:
                         row.append(cell)
                 if row:
                     data.append(row)