feat: Implement main application GUI with tabbed interface, add seed database, and enhance image path resolution.

gui/main_window.py

@@ -197,6 +197,21 @@ class MainWindow:
             fg=TEXT_MUTED
         ).pack(side=tk.RIGHT)
         
+        # Diagnostics Button
+        diag_btn = tk.Button(
+            status_frame,
+            text="🔍 Diagnostics",
+            font=FONT_SMALL,
+            bg=BG_MEDIUM,
+            fg=ACCENT_TERTIARY,
+            bd=0,
+            activebackground=BG_LIGHT,
+            activeforeground=TEXT_PRIMARY,
+            cursor='hand2',
+            command=self.show_diagnostics
+        )
+        diag_btn.pack(side=tk.RIGHT, padx=15)
+        
         tk.Label(
             status_frame,
             text="Made by Kiyreload  │  ",
@@ -240,6 +255,64 @@ class MainWindow:
         """Show the update dialog"""
         show_update_dialog(self.root)
     
+    def show_diagnostics(self):
+        """Show diagnostics information for debugging"""
+        diag_win = tk.Toplevel(self.root)
+        diag_win.title("System Diagnostics")
+        diag_win.geometry("700x500")
+        diag_win.configure(bg=BG_DARK)
+        
+        from db.db_queries import DB_PATH
+        import platform
+        
+        # Info text
+        info = [
+            f"--- Application Info ---",
+            f"Version: {VERSION}",
+            f"Frozen (EXE): {getattr(sys, 'frozen', False)}",
+            f"Python: {sys.version}",
+            f"Platform: {platform.platform()}",
+            "",
+            f"--- Database ---",
+            f"DB Path: {DB_PATH}",
+            f"DB Exists: {os.path.exists(DB_PATH)}",
+            "",
+            f"--- Search Paths ---",
+            f"Executable: {sys.executable}",
+            f"Script Root: {os.path.dirname(os.path.abspath(__file__))}",
+            f"MEIPASS (Temp): {getattr(sys, '_MEIPASS', 'N/A')}",
+            "",
+            f"--- Image Check ---"
+        ]
+        
+        # Check some images
+        img_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'images')
+        info.append(f"Images Dir (Source): {img_dir}")
+        info.append(f"Exists: {os.path.exists(img_dir)}")
+        
+        if os.path.exists(img_dir):
+            files = os.listdir(img_dir)
+            info.append(f"Files found: {len(files)}")
+            if len(files) > 0:
+                info.append(f"Sample: {files[0]}")
+        
+        content = "\n".join(info)
+        
+        # Display area
+        text_frame = tk.Frame(diag_win, bg=BG_DARK, padx=20, pady=20)
+        text_frame.pack(fill=tk.BOTH, expand=True)
+        
+        from gui.theme import create_styled_text
+        text_area = create_styled_text(text_frame)
+        text_area.pack(fill=tk.BOTH, expand=True)
+        text_area.insert(tk.END, content)
+        text_area.config(state=tk.DISABLED)
+        
+        # Close button
+        btn_frame = tk.Frame(diag_win, bg=BG_DARK, pady=15)
+        btn_frame.pack(fill=tk.X)
+        create_styled_button(btn_frame, text="Close", command=diag_win.destroy).pack()
+    
     def run(self):
         """
         Start the GUI application and display the main window.

utils.py

@@ -6,23 +6,45 @@ def resolve_image_path(db_path):
     """
     Resolve the absolute path to an image file.
     Handles the case where the database contains paths from a different machine/drive.
-    Also handles frozen (PyInstaller) state.
+    Searches multiple locations:
+    1. Bundled resources (_MEIPASS for PyInstaller)
+    2. Local 'images' folder next to the .exe or project root
+    3. The directory containing the source files
     """
     if not db_path:
         return None
         
     filename = os.path.basename(db_path)
     
-    # Check if running as frozen executable
-    if getattr(sys, 'frozen', False):
-        # PyInstaller creates a temp folder and stores path in _MEIPASS
-        if hasattr(sys, '_MEIPASS'):
-            root_dir = sys._MEIPASS
-        else:
-            root_dir = os.path.dirname(sys.executable)
-    else:
-        # Get the project root directory (directory where this utils.py resides)
-        root_dir = os.path.dirname(os.path.abspath(__file__))
+    # List of directories to search
+    search_dirs = []
     
-    # Construct optimal path
-    return os.path.join(root_dir, 'images', filename)
+    # 1. Check if running as frozen executable
+    if getattr(sys, 'frozen', False):
+        if hasattr(sys, '_MEIPASS'):
+            # Bundled images folder in _MEIPASS
+            search_dirs.append(os.path.join(sys._MEIPASS, 'images'))
+        
+        # Folder next to the .exe
+        exe_dir = os.path.dirname(sys.executable)
+        search_dirs.append(os.path.join(exe_dir, 'images'))
+        search_dirs.append(exe_dir) # Maybe images are flat in exe dir
+    
+    # 2. Source code directory
+    source_dir = os.path.dirname(os.path.abspath(__file__))
+    search_dirs.append(os.path.join(source_dir, 'images'))
+    
+    # 3. Parent of source code (project root)
+    project_root = os.path.dirname(source_dir)
+    search_dirs.append(os.path.join(project_root, 'images'))
+
+    # Try each search directory
+    for d in search_dirs:
+        if not d: continue
+        test_path = os.path.join(d, filename)
+        if os.path.exists(test_path):
+            return test_path
+            
+    # Fallback: if we haven't found it, return what would be the standard local path
+    # even if it doesn't exist (helpful for debugging)
+    return os.path.join(source_dir, 'images', filename)

version.py

@@ -4,7 +4,7 @@ This file is the single source of truth for the application version.
 """
 
 # Semantic versioning: MAJOR.MINOR.PATCH
-VERSION: str = "13.0.2"
+VERSION: str = "13.0.3"
 
 # Application metadata
 APP_NAME: str = "UmamusumeCardManager"