refactor: OWIN 웹서버 제거, WebView2 VirtualHost 방식으로 전환

- OWIN 관련 패키지 제거 (Microsoft.Owin.*, Microsoft.AspNet.WebApi.*)
- 모든 Web API 컨트롤러 삭제 (Controllers/*.cs)
- Startup.cs 삭제
- 기존 WebView2 Dialog 삭제 (fDashboard, fHolyday, fJobReport, fLogin_WB, fCommon)
- fDashboardNew만 유지 (SetVirtualHostNameToFolderMapping 방식)
- fMain.cs에서 OWIN 서버 시작 코드 제거
- 품목검색/설명서 메뉴 수정 (로컬 파일 참조로 변경)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Project/Dialog/fDashboard.Designer.cs

@@ -1,63 +0,0 @@
-namespace Project.Dialog
-{
-    partial class fDashboard
-    {
-        /// <summary>
-        /// Required designer variable.
-        /// </summary>
-        private System.ComponentModel.IContainer components = null;
-
-        /// <summary>
-        /// Clean up any resources being used.
-        /// </summary>
-        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
-        protected override void Dispose(bool disposing)
-        {
-            if (disposing && (components != null))
-            {
-                components.Dispose();
-            }
-            base.Dispose(disposing);
-        }
-
-        #region Windows Form Designer generated code
-
-        /// <summary>
-        /// Required method for Designer support - do not modify
-        /// the contents of this method with the code editor.
-        /// </summary>
-        private void InitializeComponent()
-        {
-            this.label1 = new System.Windows.Forms.Label();
-            this.SuspendLayout();
-            // 
-            // label1
-            // 
-            this.label1.Dock = System.Windows.Forms.DockStyle.Fill;
-            this.label1.Font = new System.Drawing.Font("맑은 고딕", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(129)));
-            this.label1.ForeColor = System.Drawing.Color.DimGray;
-            this.label1.Location = new System.Drawing.Point(0, 0);
-            this.label1.Name = "label1";
-            this.label1.Size = new System.Drawing.Size(1063, 567);
-            this.label1.TabIndex = 0;
-            this.label1.Text = "요약 화면 구성 중 입니다.\r\n\r\n업무일지는 \"관리->업무일지->목록\" 을 사용하세요";
-            this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
-            this.label1.Click += new System.EventHandler(this.label1_Click);
-            // 
-            // fDashboard
-            // 
-            this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 12F);
-            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-            this.ClientSize = new System.Drawing.Size(1063, 567);
-            this.Controls.Add(this.label1);
-            this.Name = "fDashboard";
-            this.Text = "요약";
-            this.ResumeLayout(false);
-
-        }
-
-        #endregion
-
-        private System.Windows.Forms.Label label1;
-    }
-}