Include hardware details in feedback submissions (#1726)

Add chip (e.g. Apple M1 Pro), RAM, hardware model, architecture
(arm64/x86_64), and display info to feedback metadata. All fields are
non-sensitive system properties collected via sysctlbyname, ProcessInfo,
and NSScreen. Server-side route accepts and renders the new fields in
both plain text and HTML email bodies.

Co-authored-by: Lawrence Chen <lawrencecchen@users.noreply.github.com>

Sources/ContentView.swift

@@ -8400,6 +8400,11 @@ private struct FeedbackComposerAppMetadata {
     let bundleIdentifier: String
     let osVersion: String
     let localeIdentifier: String
+    let hardwareModel: String
+    let chip: String
+    let memoryGB: String
+    let architecture: String
+    let displayInfo: String
 
     static var current: FeedbackComposerAppMetadata {
         let infoDictionary = Bundle.main.infoDictionary ?? [:]
@@ -8414,9 +8419,50 @@ private struct FeedbackComposerAppMetadata {
             appCommit: commit ?? "",
             bundleIdentifier: Bundle.main.bundleIdentifier ?? "",
             osVersion: ProcessInfo.processInfo.operatingSystemVersionString,
-            localeIdentifier: Locale.preferredLanguages.first ?? Locale.current.identifier
+            localeIdentifier: Locale.preferredLanguages.first ?? Locale.current.identifier,
+            hardwareModel: sysctlString("hw.model") ?? "",
+            chip: sysctlString("machdep.cpu.brand_string") ?? "",
+            memoryGB: formatMemoryGB(),
+            architecture: currentArchitecture(),
+            displayInfo: currentDisplayInfo()
         )
     }
+
+    private static func sysctlString(_ name: String) -> String? {
+        var size = 0
+        guard sysctlbyname(name, nil, &size, nil, 0) == 0, size > 0 else { return nil }
+        var buffer = [CChar](repeating: 0, count: size)
+        guard sysctlbyname(name, &buffer, &size, nil, 0) == 0 else { return nil }
+        return String(cString: buffer).trimmingCharacters(in: .whitespacesAndNewlines)
+    }
+
+    private static func formatMemoryGB() -> String {
+        let bytes = ProcessInfo.processInfo.physicalMemory
+        let gb = Double(bytes) / (1024 * 1024 * 1024)
+        return "\(Int(gb)) GB"
+    }
+
+    private static func currentArchitecture() -> String {
+        #if arch(arm64)
+        return "arm64"
+        #elseif arch(x86_64)
+        return "x86_64"
+        #else
+        return "unknown"
+        #endif
+    }
+
+    private static func currentDisplayInfo() -> String {
+        let screens = NSScreen.screens
+        let descriptions = screens.map { screen -> String in
+            let frame = screen.frame
+            let scale = screen.backingScaleFactor
+            return "\(Int(frame.width))x\(Int(frame.height)) @\(Int(scale))x"
+        }
+        let count = screens.count
+        let prefix = "\(count) display\(count == 1 ? "" : "s")"
+        return "\(prefix), \(descriptions.joined(separator: "; "))"
+    }
 }
 
 private enum FeedbackComposerSubmissionError: Error {
@@ -8470,6 +8516,11 @@ private enum FeedbackComposerClient {
         appendField("bundleIdentifier", value: metadata.bundleIdentifier, to: &body, boundary: boundary)
         appendField("osVersion", value: metadata.osVersion, to: &body, boundary: boundary)
         appendField("locale", value: metadata.localeIdentifier, to: &body, boundary: boundary)
+        appendField("hardwareModel", value: metadata.hardwareModel, to: &body, boundary: boundary)
+        appendField("chip", value: metadata.chip, to: &body, boundary: boundary)
+        appendField("memoryGB", value: metadata.memoryGB, to: &body, boundary: boundary)
+        appendField("architecture", value: metadata.architecture, to: &body, boundary: boundary)
+        appendField("displayInfo", value: metadata.displayInfo, to: &body, boundary: boundary)
 
         for attachment in preparedAttachments {
             appendFile(