diff --git a/oai/__init__.py b/oai/__init__.py
index 77da9b0..b6f4403 100644
--- a/oai/__init__.py
+++ b/oai/__init__.py
@@ -9,7 +9,7 @@ Author: Rune
 License: MIT
 """
 
-__version__ = "2.1.0"
+__version__ = "3.0.0-b2"
 __author__ = "Rune"
 __license__ = "MIT"
 
diff --git a/oai/commands/handlers.py b/oai/commands/handlers.py
index fdd5552..e9fb451 100644
--- a/oai/commands/handlers.py
+++ b/oai/commands/handlers.py
@@ -863,7 +863,8 @@ class ConfigCommand(Command):
                 # Show model selector with search term, same as /model
                 return CommandResult.success(data={"show_model_selector": True, "search": value, "set_as_default": True})
             else:
-                pass  # Show current model, silently ignore
+                # Show model selector without search filter
+                return CommandResult.success(data={"show_model_selector": True, "search": "", "set_as_default": True})
 
         elif setting == "system":
             from oai.constants import DEFAULT_SYSTEM_PROMPT
diff --git a/oai/constants.py b/oai/constants.py
index a4af2c0..f218680 100644
--- a/oai/constants.py
+++ b/oai/constants.py
@@ -10,12 +10,15 @@ from pathlib import Path
 from typing import Set, Dict, Any
 import logging
 
+# Import version from single source of truth
+from oai import __version__
+
 # =============================================================================
 # APPLICATION METADATA
 # =============================================================================
 
 APP_NAME = "oAI"
-APP_VERSION = "3.0.0"
+APP_VERSION = __version__  # Single source of truth in oai/__init__.py
 APP_URL = "https://iurl.no/oai"
 APP_DESCRIPTION = "OpenRouter AI Chat Client with MCP Integration"
 
diff --git a/oai/tui/app.py b/oai/tui/app.py
index 6f0d36a..29b0bbb 100644
--- a/oai/tui/app.py
+++ b/oai/tui/app.py
@@ -1,12 +1,15 @@
 """Main Textual TUI application for oAI."""
 
 import asyncio
+import platform
 from pathlib import Path
 from typing import Optional
 
+import pyperclip
 from textual.app import App, ComposeResult
 from textual.widgets import Input
 
+from oai import __version__
 from oai.commands.registry import CommandStatus, registry
 from oai.config.settings import Settings
 from oai.core.client import AIClient
@@ -66,7 +69,7 @@ class oAIChatApp(App):
         """Compose the TUI layout."""
         model_name = self.session.selected_model.get("name", "") if self.session.selected_model else ""
         model_info = self.session.selected_model if self.session.selected_model else None
-        yield Header(version="3.0.0", model=model_name, model_info=model_info)
+        yield Header(version=__version__, model=model_name, model_info=model_info)
         yield ChatDisplay()
         yield InputBar()
         yield CommandDropdown()
@@ -200,6 +203,10 @@ class oAIChatApp(App):
         elif event.key == "ctrl+n":
             event.prevent_default()
             self.call_later(self._handle_next_command)
+        elif event.key in ("f3", "ctrl+y"):
+            # F3 or Ctrl+Y to copy last AI response
+            event.prevent_default()
+            self.action_copy_last_response()
 
     def on_input_changed(self, event: Input.Changed) -> None:
         """Handle input value changes to show/hide command dropdown."""
@@ -817,11 +824,17 @@ class oAIChatApp(App):
             info_widget = UserMessageWidget(result.message)
             await chat_display.add_message(info_widget)
 
+        # Handle special command data (e.g., show_model_selector)
+        if result and result.data:
+            await self._handle_command_data(result.data)
+
     async def _handle_command_data(self, data: dict) -> None:
         """Handle special command result data."""
         # Model selection
         if "show_model_selector" in data:
-            self._show_model_selector(data.get("search", ""))
+            search = data.get("search", "")
+            set_as_default = data.get("set_as_default", False)
+            self._show_model_selector(search, set_as_default)
 
         # Retry prompt
         elif "retry_prompt" in data:
@@ -831,7 +844,7 @@ class oAIChatApp(App):
         elif "paste_prompt" in data:
             await self.handle_message(data["paste_prompt"])
 
-    def _show_model_selector(self, search: str = "") -> None:
+    def _show_model_selector(self, search: str = "", set_as_default: bool = False) -> None:
         """Show the model selector screen."""
         def handle_model_selection(selected: Optional[dict]) -> None:
             """Handle the model selection result."""
@@ -840,10 +853,17 @@ class oAIChatApp(App):
                 header = self.query_one(Header)
                 header.update_model(selected.get("name", ""), selected)
 
+                # Save as default if requested
+                if set_as_default:
+                    self.settings.set_default_model(selected["id"])
+
                 # Show confirmation in chat
                 async def add_confirmation():
                     chat_display = self.query_one(ChatDisplay)
-                    info_widget = UserMessageWidget(f"✓ Model changed to: {selected['id']}")
+                    if set_as_default:
+                        info_widget = UserMessageWidget(f"✓ Default model set to: {selected['id']}")
+                    else:
+                        info_widget = UserMessageWidget(f"✓ Model changed to: {selected['id']}")
                     await chat_display.add_message(info_widget)
 
                 self.call_later(add_confirmation)
@@ -1000,3 +1020,36 @@ class oAIChatApp(App):
     async def _handle_next_command(self) -> None:
         """Handle Ctrl+N to show next message."""
         await self.handle_command("/next")
+
+    def action_copy_last_response(self) -> None:
+        """Copy the last AI response to clipboard."""
+        try:
+            chat_display = self.query_one(ChatDisplay)
+
+            # Find the last AssistantMessageWidget
+            assistant_widgets = [
+                child for child in chat_display.children
+                if isinstance(child, AssistantMessageWidget)
+            ]
+
+            if not assistant_widgets:
+                self.notify("No AI responses to copy", severity="warning")
+                return
+
+            # Get the last assistant message
+            last_assistant = assistant_widgets[-1]
+            text = last_assistant.full_text
+
+            if not text:
+                self.notify("Last response is empty", severity="warning")
+                return
+
+            # Copy to clipboard
+            pyperclip.copy(text)
+
+            # Show success notification
+            preview = text[:50] + "..." if len(text) > 50 else text
+            self.notify(f"✓ Copied: {preview}", severity="information")
+
+        except Exception as e:
+            self.notify(f"Copy failed: {e}", severity="error")
diff --git a/oai/tui/screens/help_screen.py b/oai/tui/screens/help_screen.py
index 3142cc1..daa637c 100644
--- a/oai/tui/screens/help_screen.py
+++ b/oai/tui/screens/help_screen.py
@@ -63,10 +63,12 @@ class HelpScreen(ModalScreen[None]):
 [bold cyan]═══ KEYBOARD SHORTCUTS ═══[/]
 [bold]F1[/]             Show this help (Ctrl+H may not work)
 [bold]F2[/]             Open model selector (Ctrl+M may not work)
+[bold]F3[/]             Copy last AI response to clipboard
 [bold]Ctrl+S[/]         Show session statistics
 [bold]Ctrl+L[/]         Clear chat display
 [bold]Ctrl+P[/]         Show previous message
 [bold]Ctrl+N[/]         Show next message
+[bold]Ctrl+Y[/]         Copy last AI response (alternative to F3)
 [bold]Ctrl+Q[/]         Quit application
 [bold]Up/Down[/]        Navigate input history
 [bold]ESC[/]            Close dialogs
diff --git a/oai/tui/styles.tcss b/oai/tui/styles.tcss
index 6c1f0d3..7f04a9c 100644
--- a/oai/tui/styles.tcss
+++ b/oai/tui/styles.tcss
@@ -56,7 +56,9 @@ AssistantMessageWidget {
 #assistant-content {
     height: auto;
     max-height: 100%;
-    color: $text;
+    color: #cccccc;
+    link-color: #888888;
+    link-style: none;
 }
 
 InputBar {
diff --git a/oai/tui/widgets/header.py b/oai/tui/widgets/header.py
index 7c28441..cfbd09a 100644
--- a/oai/tui/widgets/header.py
+++ b/oai/tui/widgets/header.py
@@ -8,7 +8,7 @@ from typing import Optional, Dict, Any
 class Header(Static):
     """Header displaying app title, version, current model, and capabilities."""
 
-    def __init__(self, version: str = "3.0.0", model: str = "", model_info: Optional[Dict[str, Any]] = None):
+    def __init__(self, version: str = "3.0.1", model: str = "", model_info: Optional[Dict[str, Any]] = None):
         super().__init__()
         self.version = version
         self.model = model
diff --git a/oai/tui/widgets/message.py b/oai/tui/widgets/message.py
index e7e4cc2..98d6226 100644
--- a/oai/tui/widgets/message.py
+++ b/oai/tui/widgets/message.py
@@ -2,10 +2,29 @@
 
 from typing import Any, AsyncIterator, Tuple
 
+from rich.console import Console
 from rich.markdown import Markdown
+from rich.style import Style
+from rich.theme import Theme
 from textual.app import ComposeResult
 from textual.widgets import RichLog, Static
 
+# Custom theme for Markdown rendering - neutral colors matching the dark theme
+MARKDOWN_THEME = Theme({
+    "markdown.text": Style(color="#cccccc"),
+    "markdown.paragraph": Style(color="#cccccc"),
+    "markdown.code": Style(color="#e0e0e0", bgcolor="#2a2a2a"),
+    "markdown.code_block": Style(color="#e0e0e0", bgcolor="#2a2a2a"),
+    "markdown.heading": Style(color="#ffffff", bold=True),
+    "markdown.h1": Style(color="#ffffff", bold=True),
+    "markdown.h2": Style(color="#eeeeee", bold=True),
+    "markdown.h3": Style(color="#dddddd", bold=True),
+    "markdown.link": Style(color="#aaaaaa", underline=False),
+    "markdown.link_url": Style(color="#888888"),
+    "markdown.emphasis": Style(color="#cccccc", italic=True),
+    "markdown.strong": Style(color="#ffffff", bold=True),
+})
+
 
 class UserMessageWidget(Static):
     """Widget for displaying user messages."""
@@ -54,7 +73,9 @@ class AssistantMessageWidget(Static):
             if hasattr(chunk, "delta_content") and chunk.delta_content:
                 self.full_text += chunk.delta_content
                 log.clear()
-                log.write(Markdown(self.full_text))
+                # Use neutral code theme for syntax highlighting
+                md = Markdown(self.full_text, code_theme="github-dark", inline_code_theme="github-dark")
+                log.write(md)
 
             if hasattr(chunk, "usage") and chunk.usage:
                 usage = chunk.usage
@@ -66,4 +87,6 @@ class AssistantMessageWidget(Static):
         self.full_text = content
         log = self.query_one("#assistant-content", RichLog)
         log.clear()
-        log.write(Markdown(content))
+        # Use neutral code theme for syntax highlighting
+        md = Markdown(content, code_theme="github-dark", inline_code_theme="github-dark")
+        log.write(md)
diff --git a/pyproject.toml b/pyproject.toml
index 4e41212..cfc4767 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "oai"
-version = "3.0.0"
+version = "3.0.0-b2"  # MUST match oai/__init__.py __version__
 description = "OpenRouter AI Chat Client - A feature-rich terminal-based chat application"
 readme = "README.md"
 license = {text = "MIT"}