refactor: modularizar como PocketSync con soporte de perfiles

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

ui/summary_panel.py

@@ -0,0 +1,33 @@
+import tkinter as tk
+
+from ui import styles
+
+
+class SummaryPanel(tk.Frame):
+    """Panel de texto deshabilitado para mostrar el resumen de sync."""
+
+    def __init__(self, parent, **kwargs):
+        super().__init__(parent, **kwargs)
+
+        tk.Label(self, text="Resumen:", font=styles.FONT_LABEL).pack(pady=(6, 2))
+
+        self._text = tk.Text(
+            self,
+            height=6,
+            state="disabled",
+            bg=styles.SUMMARY_BG,
+            fg=styles.SUMMARY_FG,
+            font=styles.FONT_MONO,
+        )
+        self._text.pack(fill="both", expand=False, padx=styles.PAD_X, pady=styles.PAD_Y)
+
+    def append(self, line: str) -> None:
+        self._text.configure(state="normal")
+        self._text.insert(tk.END, line + "\n")
+        self._text.see(tk.END)
+        self._text.configure(state="disabled")
+
+    def clear(self) -> None:
+        self._text.configure(state="normal")
+        self._text.delete(1.0, tk.END)
+        self._text.configure(state="disabled")