Add USB checkout system and SSO profile page

New Features:
- USB Device checkout/check-in system with barcode scanning
  - displayusb.asp: List all USB devices with status
  - addusb.asp: Add new USB devices via barcode scan
  - checkout_usb.asp/savecheckout_usb.asp: Check out USB to SSO
  - checkin_usb.asp/savecheckin_usb.asp: Check in with wipe confirmation
  - usb_history.asp: Full checkout history with filters
  - api_usb.asp: JSON API for AJAX lookups
- displayprofile.asp: SSO profile page showing user info and USB history
- Date/time format changed to 12-hour (MM/DD/YYYY h:mm AM/PM)
- SSO links in USB history now link to profile page via search

Database:
- New machinetypeid 44 for USB devices
- New usb_checkouts table for tracking checkouts

Cleanup:
- Removed v2 folder (duplicate/old files)
- Removed old debug/test files
- Removed completed migration documentation

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

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

CLAUDE_PROJECT_INSTRUCTIONS.md

@@ -0,0 +1,76 @@
+# Claude.ai Project Instructions for ShopDB
+
+Copy this into your Claude.ai project's "Instructions" field.
+
+---
+
+## Project Instructions (Copy Below This Line)
+
+You are helping maintain ShopDB, a Classic ASP/VBScript web application for GE Aerospace shop floor infrastructure management.
+
+### Technology Context
+- **Language:** Classic ASP with VBScript (NOT .NET)
+- **Database:** MySQL 5.6 (NOT SQL Server)
+- **Frontend:** Bootstrap 4.6, jQuery, DataTables
+
+### Critical VBScript Rules
+1. **No IIf() function** - VBScript doesn't have it. Use If-Then-Else:
+   ```vbscript
+   ' WRONG: value = IIf(condition, "yes", "no")
+   ' RIGHT:
+   If condition Then
+       value = "yes"
+   Else
+       value = "no"
+   End If
+   ```
+
+2. **Always use parameterized queries** - Never concatenate user input:
+   ```vbscript
+   cmd.CommandText = "SELECT * FROM machines WHERE machineid = ?"
+   cmd.Parameters.Append cmd.CreateParameter("@id", 3, 1, , machineId)
+   ```
+
+3. **Convert text fields to strings** with `& ""` to avoid Null errors:
+   ```vbscript
+   hostname = rs("hostname") & ""
+   ```
+
+4. **HTMLEncode all output** to prevent XSS:
+   ```vbscript
+   Response.Write(Server.HTMLEncode(value))
+   ```
+
+### Database Schema (Current)
+- `machines` table contains Equipment, PCs, and Network Devices
+- PCs identified by: `pctypeid IS NOT NULL` or `machinetypeid IN (33,34,35)`
+- Equipment identified by: `pctypeid IS NULL`
+- Network interfaces in `communications` table (use `address` not `ipaddress`)
+- Relationships in `machinerelationships` table
+- Printers stay in separate `printers` table
+
+### File Naming Conventions
+- `display*.asp` - View/list pages (read-only)
+- `add*.asp` - Forms for adding new records
+- `edit*.asp` - Forms for editing existing records
+- `save*.asp` - Backend handlers for form submissions
+- `update*.asp` - Backend handlers for updates
+
+### Common Patterns
+When asked to modify ASP code:
+1. Check for existing similar code patterns in the file
+2. Follow the existing error handling style
+3. Use the same SQL helper functions (ExecuteQuery, etc.)
+4. Maintain consistent indentation (tabs or spaces matching file)
+
+### When Debugging
+- Check for Null handling issues first
+- Look for missing `& ""` on string fields
+- Verify column names match current schema
+- Check if using old `pc` table references (should use `machines`)
+
+### Response Style
+- Be concise - this is a legacy codebase, not a greenfield project
+- Match existing code style when making changes
+- Don't add unnecessary comments or refactoring
+- Focus on the specific task requested