chore: remove dead code and clean up stale artifacts

Remove unused `getClipboardText()` from PlatformActions and all
implementations. Delete obsolete EZLink.json sample file and CEPAS
compat parsing from MetrodroidJsonParser. Remove stale plan documents.
Also add kotlin-serialization plugin to web module, fix synchronous
XHR binary loading in wasmJs ResourceAccessor, and update README
WebUSB description.

Author: Claude

README.md

@@ -184,7 +184,7 @@ Some MIFARE Classic cards require encryption keys to read. You can obtain keys u
 * **Android:** NFC-enabled device running Android 6.0 (API 23) or later
 * **iOS:** iPhone 7 or later with iOS support for CoreNFC
 * **macOS** (experimental): Mac with a PC/SC-compatible NFC smart card reader (e.g., ACR122U), a PN533-based USB NFC controller (e.g., SCL3711), or a Sony RC-S956 (PaSoRi) USB NFC reader
-* **Web** (experimental): Any modern browser with WebAssembly support. Card data can be imported from JSON files exported by other platforms. NFC reading via WebUSB is planned but not yet implemented.
+* **Web** (experimental): Any modern browser with WebAssembly support. Card data can be imported from JSON files exported by other platforms. Live NFC card reading is supported in Chrome/Edge/Opera via WebUSB with a PN533-based USB NFC reader (e.g., SCL3711).
 
 ## Building
 

app/desktop/src/jvmMain/kotlin/com/codebutler/farebot/desktop/DesktopPlatformActions.kt

@@ -3,7 +3,6 @@ package com.codebutler.farebot.desktop
 import com.codebutler.farebot.shared.platform.PlatformActions
 import java.awt.Desktop
 import java.awt.Toolkit
-import java.awt.datatransfer.DataFlavor
 import java.awt.datatransfer.StringSelection
 import java.io.File
 import java.net.URI
@@ -27,15 +26,6 @@ class DesktopPlatformActions : PlatformActions {
         clipboard.setContents(StringSelection(text), null)
     }
 
-    override fun getClipboardText(): String? {
-        val clipboard = Toolkit.getDefaultToolkit().systemClipboard
-        return try {
-            clipboard.getData(DataFlavor.stringFlavor) as? String
-        } catch (_: Exception) {
-            null
-        }
-    }
-
     override fun shareText(text: String) {
         copyToClipboard(text)
         showToast("Copied to clipboard")

app/src/androidMain/kotlin/com/codebutler/farebot/app/core/platform/AndroidPlatformActions.kt

@@ -84,14 +84,6 @@ class AndroidPlatformActions(
         clipboard.setPrimaryClip(ClipData.newPlainText("FareBot", text))
     }
 
-    override fun getClipboardText(): String? {
-        val clipboard = context.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
-        return clipboard.primaryClip
-            ?.getItemAt(0)
-            ?.text
-            ?.toString()
-    }
-
     override fun shareText(text: String) {
         val intent =
             Intent(Intent.ACTION_SEND).apply {

app/src/commonMain/composeResources/files/samples/EZLink.json

@@ -11,8 +11,6 @@ interface PlatformActions {
 
     fun copyToClipboard(text: String)
 
-    fun getClipboardText(): String?
-
     fun shareText(text: String)
 
     fun showToast(message: String)