Fix Enter key semantics and add expandable model descriptions

- Replace TextEditor with NativeTextEditor (NSViewRepresentable) so plain
  Enter sends the message and Shift/Cmd+Enter inserts a newline. The old
  TextEditor passed bare Return directly to NSTextView before SwiftUI's
  onKeyPress could intercept it, accidentally making Cmd+Enter send instead.
- Add More…/Less toggle in ModelInfoView for descriptions longer than 250
  characters, with smooth expand/collapse animation.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

oAI/Views/Main/InputBar.swift

@@ -44,7 +44,7 @@ struct InputBar: View {
 
     @State private var showCommandDropdown = false
     @State private var selectedSuggestionIndex: Int = 0
-    @FocusState private var isInputFocused: Bool
+    @State private var isInputFocused: Bool = false
 
     private static let minInputHeight: CGFloat = 56
     private static let maxInputHeight: CGFloat = 320
@@ -95,55 +95,50 @@ struct InputBar: View {
                     }
 
                     // Editor — fills the fixed-height box, bottom area reserved for globe
-                    TextEditor(text: $text)
+                    NativeTextEditor(
-                        .font(.system(size: settings.inputTextSize))
+                        text: $text,
-                        .foregroundColor(.oaiPrimary)
+                        font: .systemFont(ofSize: settings.inputTextSize),
-                        .scrollContentBackground(.hidden)
+                        textColor: NSColor(Color.oaiPrimary),
-                        .padding(.horizontal, 8)
+                        isFocused: isInputFocused,
-                        .padding(.top, 6)
+                        onReturn: {
-                        .padding(.bottom, 30)
-                        .frame(maxWidth: .infinity, maxHeight: .infinity)
-                        .focused($isInputFocused)
-                        .onChange(of: text) {
-                            showCommandDropdown = text.hasPrefix("/")
-                            selectedSuggestionIndex = 0
-                        }
-                        #if os(macOS)
-                        .onKeyPress(.upArrow) {
-                            if showCommandDropdown && selectedSuggestionIndex > 0 {
-                                selectedSuggestionIndex -= 1
-                                return .handled
-                            }
-                            return .ignored
-                        }
-                        .onKeyPress(.downArrow) {
-                            if showCommandDropdown {
-                                let count = CommandSuggestionsView.filteredCommands(for: text).count
-                                if selectedSuggestionIndex < count - 1 {
-                                    selectedSuggestionIndex += 1
-                                    return .handled
-                                }
-                            }
-                            return .ignored
-                        }
-                        .onKeyPress(.escape) {
-                            if showCommandDropdown { showCommandDropdown = false; return .handled }
-                            if isGenerating { onCancel(); return .handled }
-                            return .ignored
-                        }
-                        .onKeyPress(.return, phases: .down) { press in
-                            if press.modifiers.contains(.shift) { return .ignored }
                             if showCommandDropdown {
                                 let suggestions = CommandSuggestionsView.filteredCommands(for: text)
                                 if !suggestions.isEmpty && selectedSuggestionIndex < suggestions.count {
                                     selectCommand(suggestions[selectedSuggestionIndex].command)
-                                    return .handled
+                                    return true
                                 }
                             }
-                            if !text.isEmpty { onSend(); return .handled }
+                            if !text.isEmpty { onSend(); return true }
-                            return .handled
+                            return true
-                        }
+                        },
-                        #endif
+                        onEscape: {
+                            if showCommandDropdown { showCommandDropdown = false; return true }
+                            if isGenerating { onCancel(); return true }
+                            return false
+                        },
+                        onUpArrow: {
+                            if showCommandDropdown && selectedSuggestionIndex > 0 {
+                                selectedSuggestionIndex -= 1; return true
+                            }
+                            return false
+                        },
+                        onDownArrow: {
+                            if showCommandDropdown {
+                                let count = CommandSuggestionsView.filteredCommands(for: text).count
+                                if selectedSuggestionIndex < count - 1 {
+                                    selectedSuggestionIndex += 1; return true
+                                }
+                            }
+                            return false
+                        },
+                        onFocusChange: { focused in isInputFocused = focused }
+                    )
+                    .frame(maxWidth: .infinity, maxHeight: .infinity)
+                    .onChange(of: text) {
+                        showCommandDropdown = text.hasPrefix("/")
+                        selectedSuggestionIndex = 0
+                    }
+                    .padding(.bottom, 30)
 
                     // Online / offline toggle — bottom-left of the text box
                     VStack {

oAI/Views/Main/NativeTextEditor.swift

@@ -0,0 +1,171 @@
+//
+//  NativeTextEditor.swift
+//  oAI
+//
+//  NSViewRepresentable text editor with correct Enter-key semantics:
+//  plain Enter → send, Shift+Enter or Cmd+Enter → newline.
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// Copyright (C) 2026 Rune Olsen
+
+import SwiftUI
+import AppKit
+
+struct NativeTextEditor: NSViewRepresentable {
+    @Binding var text: String
+    var font: NSFont
+    var textColor: NSColor
+    var isFocused: Bool
+
+    /// Plain Enter (no modifiers). Return true if the event was consumed.
+    var onReturn: () -> Bool
+    /// Escape key. Return true if consumed.
+    var onEscape: () -> Bool
+    /// Up arrow. Return true if consumed.
+    var onUpArrow: () -> Bool
+    /// Down arrow. Return true if consumed.
+    var onDownArrow: () -> Bool
+    /// Called when the view gains or loses first-responder status.
+    var onFocusChange: (Bool) -> Void
+
+    // MARK: - NSViewRepresentable
+
+    func makeNSView(context: Context) -> NSScrollView {
+        let scrollView = NSScrollView()
+        scrollView.hasVerticalScroller = false
+        scrollView.hasHorizontalScroller = false
+        scrollView.drawsBackground = false
+        scrollView.borderType = .noBorder
+
+        let tv = context.coordinator.textView
+        tv.delegate = context.coordinator
+        tv.isEditable = true
+        tv.isRichText = false
+        tv.drawsBackground = false
+        tv.backgroundColor = .clear
+        tv.isAutomaticQuoteSubstitutionEnabled = false
+        tv.isAutomaticDashSubstitutionEnabled = false
+        tv.isAutomaticSpellingCorrectionEnabled = true
+        tv.isContinuousSpellCheckingEnabled = true
+        tv.allowsUndo = true
+        tv.isVerticallyResizable = true
+        tv.isHorizontallyResizable = false
+        tv.autoresizingMask = [.width]
+        tv.textContainer?.widthTracksTextView = true
+        tv.textContainerInset = NSSize(width: 8, height: 6)
+
+        scrollView.documentView = tv
+        return scrollView
+    }
+
+    func updateNSView(_ scrollView: NSScrollView, context: Context) {
+        let tv = context.coordinator.textView
+        let coord = context.coordinator
+
+        // Update text only when it differs (avoids caret-jumping on every keystroke)
+        if tv.string != text {
+            let sel = tv.selectedRanges
+            tv.string = text
+            let len = (tv.string as NSString).length
+            tv.selectedRanges = sel.map { v in
+                let r = v.rangeValue
+                let loc = min(r.location, len)
+                let length = min(r.length, max(0, len - loc))
+                return NSValue(range: NSRange(location: loc, length: length))
+            }
+        }
+
+        if tv.font != font       { tv.font = font }
+        if tv.textColor != textColor { tv.textColor = textColor }
+
+        // Keep coordinator callbacks current with each SwiftUI render
+        coord.textBinding  = $text
+        coord.onReturn     = onReturn
+        coord.onEscape     = onEscape
+        coord.onUpArrow    = onUpArrow
+        coord.onDownArrow  = onDownArrow
+        coord.onFocusChange = onFocusChange
+
+        if isFocused {
+            DispatchQueue.main.async {
+                guard let window = tv.window, window.firstResponder !== tv else { return }
+                window.makeFirstResponder(tv)
+            }
+        }
+    }
+
+    func makeCoordinator() -> Coordinator { Coordinator() }
+
+    // MARK: - Coordinator
+
+    final class Coordinator: NSObject, NSTextViewDelegate {
+        let textView = KeyableNSTextView()
+
+        // Updated on every SwiftUI render via updateNSView
+        var textBinding:   Binding<String>?
+        var onReturn:      () -> Bool = { false }
+        var onEscape:      () -> Bool = { false }
+        var onUpArrow:     () -> Bool = { false }
+        var onDownArrow:   () -> Bool = { false }
+        var onFocusChange: (Bool) -> Void = { _ in }
+
+        override init() {
+            super.init()
+            textView.coordinator = self
+        }
+
+        func textDidChange(_ notification: Notification) {
+            guard let tv = notification.object as? NSTextView else { return }
+            textBinding?.wrappedValue = tv.string
+        }
+    }
+}
+
+// MARK: - KeyableNSTextView
+
+/// NSTextView that routes Return / Escape / arrow keys to the SwiftUI
+/// coordinator before the AppKit default handling runs.
+final class KeyableNSTextView: NSTextView {
+    weak var coordinator: NativeTextEditor.Coordinator?
+
+    override func keyDown(with event: NSEvent) {
+        guard let coord = coordinator else { super.keyDown(with: event); return }
+
+        let flags = event.modifierFlags.intersection(.deviceIndependentFlagsMask)
+        let shift = flags.contains(.shift)
+        let cmd   = flags.contains(.command)
+
+        switch event.keyCode {
+        case 36: // Return
+            if shift || cmd {
+                // Shift+Enter or Cmd+Enter → literal newline
+                insertNewlineIgnoringFieldEditor(nil)
+            } else {
+                // Plain Enter → let SwiftUI decide (send or select dropdown item)
+                if !coord.onReturn() {
+                    insertNewlineIgnoringFieldEditor(nil)
+                }
+            }
+        case 53: // Escape
+            if !coord.onEscape() { super.keyDown(with: event) }
+        case 126: // Up arrow
+            if !coord.onUpArrow() { super.keyDown(with: event) }
+        case 125: // Down arrow
+            if !coord.onDownArrow() { super.keyDown(with: event) }
+        default:
+            super.keyDown(with: event)
+        }
+    }
+
+    override func becomeFirstResponder() -> Bool {
+        let ok = super.becomeFirstResponder()
+        if ok { coordinator?.onFocusChange(true) }
+        return ok
+    }
+
+    override func resignFirstResponder() -> Bool {
+        let ok = super.resignFirstResponder()
+        if ok { coordinator?.onFocusChange(false) }
+        return ok
+    }
+}

oAI/Views/Screens/ModelInfoView.swift

@@ -30,6 +30,7 @@ struct ModelInfoView: View {
 
     @Environment(\.dismiss) var dismiss
     @Bindable private var settings = SettingsService.shared
+    @State private var isDescriptionExpanded = false
 
     var body: some View {
         VStack(spacing: 0) {
@@ -78,8 +79,18 @@ struct ModelInfoView: View {
                             Text(desc)
                                 .font(.body)
                                 .foregroundColor(.primary)
-                                .fixedSize(horizontal: false, vertical: true)
+                                .lineLimit(isDescriptionExpanded ? nil : 4)
                                 .textSelection(.enabled)
+                            if desc.count > 250 {
+                                Button(isDescriptionExpanded ? "Less" : "More…") {
+                                    withAnimation(.easeInOut(duration: 0.2)) {
+                                        isDescriptionExpanded.toggle()
+                                    }
+                                }
+                                .font(.callout)
+                                .foregroundStyle(.blue)
+                                .buttonStyle(.plain)
+                            }
                         }
                         .padding(.leading, 4)
                     }