diff --git a/lib/claw/tui/chat_panel.rb b/lib/claw/tui/chat_panel.rb
index 8af4d6c..75a6c81 100644
--- a/lib/claw/tui/chat_panel.rb
+++ b/lib/claw/tui/chat_panel.rb
@@ -10,10 +10,12 @@ module ChatPanel
       def self.render(model, width, height)
         # Configure textarea width and render it
         ta = model.textarea
-        ta.width = width - 4
+        ta.width = width - 2
         # Dynamic height: expand to actual line count, cap at 5
         line_count = [ta.line_count, 1].max
         ta.height = [line_count, 5].min
+        # Recalculate viewport offset with new height (stale from previous render cycle)
+        ta.instance_variable_set(:@viewport_offset, [ta.row - ta.height + 1, 0].max)
         # Show line numbers in multi-line mode for visual clarity
         ta.show_line_numbers = line_count > 1
         input_view = ta.view
@@ -21,15 +23,15 @@ def self.render(model, width, height)
         input_h = [input_h, 5].min
 
         # Chat viewport fills remaining space
-        chat_height = height - input_h - 1
+        chat_height = height - input_h
         chat_height = 3 if chat_height < 3
 
         # Render chat messages
-        content = render_messages(model.chat_history, width - 4)
+        content = render_messages(model.chat_history, width - 2, zone: model.zone)
 
         # Set up viewport
         viewport = model.chat_viewport
-        viewport.width = width - 4
+        viewport.width = width - 2
         viewport.height = chat_height
         viewport.content = content
         viewport.goto_bottom unless model.scrolled_up?
@@ -41,12 +43,12 @@ def self.render(model, width, height)
         Styles::PANEL_BORDER.width(width).height(height).render(panel)
       end
 
-      def self.render_messages(messages, width)
+      def self.render_messages(messages, width, zone: nil)
         # Fold consecutive tool calls
         messages = Folding.fold_tool_calls(messages)
 
         lines = []
-        messages.each do |msg|
+        messages.each_with_index do |msg, idx|
           case msg[:role]
           when :user
             lines << Styles::USER_STYLE.render(">> #{msg[:content]}")
@@ -56,7 +58,10 @@ def self.render_messages(messages, width)
             rescue
               msg[:content].to_s
             end
-            folded = Folding.fold_text(rendered.rstrip)
+            folded = Folding.fold_text(rendered.rstrip, zone: zone, fold_id: idx)
+            if folded[:folded]
+              msg[:folded_full] = folded[:full]
+            end
             lines << Styles::AGENT_STYLE.render("claw> ") + folded[:display]
           when :tool_call
             lines << Styles::TOOL_STYLE.render("  #{msg[:icon] || "⚡"} #{msg[:detail]}")
@@ -68,7 +73,8 @@ def self.render_messages(messages, width)
           when :error
             lines << Styles::ERROR_STYLE.render("error: #{msg[:content]}")
           when :system
-            lines << Styles::TOOL_STYLE.render("  #{msg[:content]}")
+            indented = msg[:content].to_s.gsub(/^/, "  ")
+            lines << Styles::TOOL_STYLE.render(indented)
           end
         end
         lines.join("\n")
diff --git a/lib/claw/tui/input_handler.rb b/lib/claw/tui/input_handler.rb
index 2dc30b0..609d74d 100644
--- a/lib/claw/tui/input_handler.rb
+++ b/lib/claw/tui/input_handler.rb
@@ -35,6 +35,16 @@ def self.completions(prefix, binding:, memory: nil)
           candidates.concat(
             receiver.methods.map(&:to_s).reject { |m| m.start_with?("_") || (m.include?("!") && m.length < 3) }
           )
+
+          # Include private methods (def in eval creates private methods)
+          candidates.concat(
+            receiver.private_methods(false).map(&:to_s).reject { |m| m.start_with?("_") || (m.include?("!") && m.length < 3) }
+          )
+
+          # Include tracked REPL definitions
+          if receiver.instance_variable_defined?(:@__claw_definitions__)
+            candidates.concat(receiver.instance_variable_get(:@__claw_definitions__).keys)
+          end
         rescue
           # Binding is invalid or inaccessible; skip local completions
         end
diff --git a/lib/claw/tui/model.rb b/lib/claw/tui/model.rb
index 690dc2a..d9cf3ca 100644
--- a/lib/claw/tui/model.rb
+++ b/lib/claw/tui/model.rb
@@ -4,13 +4,37 @@
 require "bubbles"
 require "io/console"
 
+begin
+  require "bubblezone"
+rescue LoadError
+  # bubblezone gem ships versioned native extensions (e.g. 4.0/bubblezone.bundle)
+  # but its loader may not route by Ruby version. Patch and retry.
+  begin
+    spec = Gem::Specification.find_by_name("bubblezone")
+    major, minor, = RUBY_VERSION.split(".")
+    versioned_dir = File.join(spec.gem_dir, "lib", "bubblezone", "#{major}.#{minor}")
+    if File.directory?(versioned_dir)
+      # Add versioned dir so require_relative "bubblezone/bubblezone" resolves
+      target = File.join(spec.gem_dir, "lib", "bubblezone", "bubblezone.bundle")
+      source = File.join(versioned_dir, "bubblezone.bundle")
+      unless File.exist?(target)
+        File.symlink(source, target)
+      end
+      require "bubblezone"
+    end
+  rescue LoadError, Gem::MissingSpecError, Errno::EEXIST, Errno::EACCES
+    # mouse click zones will be disabled but scroll/drag still work.
+  end
+end
+
 module Claw
   module TUI
     # MVU Model — central state for the TUI application.
     # Implements Bubbletea's init/update/view protocol.
     class Model
       attr_reader :runtime, :chat_history, :mode, :chat_viewport, :executor, :textarea,
-                  :baseline_methods, :input_history
+                  :baseline_methods, :input_history, :zone
+      attr_accessor :chat_ratio, :dragging_divider
 
       def initialize(caller_binding)
         @caller_binding = caller_binding
@@ -22,6 +46,11 @@ def initialize(caller_binding)
         @input_history = []
         @history_index = nil
         @saved_input = +""
+        @chat_ratio = 0.70
+        @dragging_divider = false
+        @view_width = 80
+        @view_height = 24
+        @zone = defined?(Bubblezone::Manager) ? Bubblezone::Manager.new : nil
         @baseline_methods = begin
           caller_binding.eval("methods").dup
         rescue
@@ -60,6 +89,8 @@ def update(msg)
         cmd = case msg
               when Bubbletea::KeyMessage
                 return handle_key(msg)
+              when Bubbletea::MouseMessage
+                return handle_mouse(msg)
               when Bubbles::Spinner::TickMessage
                 @spinner, spinner_cmd = @spinner.update(msg)
                 Bubbletea.batch(spinner_cmd, Bubbletea.tick(1.0) { TickMsg.new(time: Time.now) })
@@ -91,6 +122,8 @@ def update(msg)
               when StateChangeMsg
                 Bubbletea.none
               when Bubbletea::WindowSizeMessage
+                @view_width = msg.width
+                @view_height = msg.height
                 Bubbletea.none
               else
                 Bubbletea.none
@@ -99,7 +132,8 @@ def update(msg)
       end
 
       def view
-        h, w = IO.console&.winsize || [24, 80]
+        w = @view_width
+        h = @view_height
         w = 80 if w < 40
         h = 24 if h < 12
         Layout.render(self, w, h)
@@ -123,6 +157,79 @@ def spinner_view = @spinner.view
 
       private
 
+      def handle_mouse(msg)
+        w = @view_width
+        h = @view_height
+        divider_x = (w * @chat_ratio).to_i
+
+        if msg.wheel?
+          if msg.button == Bubbletea::MouseMessage::BUTTON_WHEEL_UP
+            @chat_viewport.scroll_up(3)
+            @scrolled_up = true
+          else
+            @chat_viewport.scroll_down(3)
+            @scrolled_up = @chat_viewport.at_bottom? ? false : true
+          end
+        elsif msg.press?
+          if msg.left?
+            # Click near divider (±2 cols) and below status bar → start drag
+            if (msg.x - divider_x).abs <= 2 && msg.y > 1
+              @dragging_divider = true
+            else
+              handle_mouse_click(msg, w, h)
+            end
+          end
+        elsif msg.motion?
+          if @dragging_divider
+            @chat_ratio = (msg.x.to_f / w).clamp(0.3, 0.85)
+          end
+        elsif msg.release?
+          @dragging_divider = false
+        end
+
+        [self, Bubbletea.none]
+      end
+
+      def handle_mouse_click(msg, width, height)
+        return unless @zone
+        hit = @zone.find_in_bounds(msg.x, msg.y)
+        return unless hit
+        zone_id, _zone_info = hit
+
+        case zone_id
+        when /\Asnap_(\d+)\z/
+          snap_id = $1.to_i
+          @chat_history << {
+            role: :system,
+            content: "Snapshot ##{snap_id} selected. Type /rollback #{snap_id} to restore."
+          }
+
+        when /\Amem_(\d+)\z/
+          mem_id = $1.to_i
+          fact = Claw.memory&.long_term&.find { |m| m[:id] == mem_id }
+          if fact
+            @chat_history << { role: :system, content: "Memory ##{mem_id}: #{fact[:content]}" }
+          end
+
+        when /\Atool_(.+)\z/
+          tool_name = $1
+          @chat_history << {
+            role: :system,
+            content: "Tool: #{tool_name}. Use /forge #{tool_name} to promote."
+          }
+
+        when /\Afold_(\d+)\z/
+          idx = $1.to_i
+          if idx < @chat_history.size
+            m = @chat_history[idx]
+            if m[:folded_full]
+              m[:content] = m[:folded_full]
+              m.delete(:folded_full)
+            end
+          end
+        end
+      end
+
       def handle_key(msg)
         key = msg.to_s
 
@@ -159,7 +266,7 @@ def handle_key(msg)
             return submit_textarea
           end
         when "up"
-          if @textarea.line_count <= 1
+          if @textarea.line_count <= 1 || @textarea.row == 0
             navigate_history(:up)
             return [self, Bubbletea.none]
           else
@@ -167,7 +274,7 @@ def handle_key(msg)
             return [self, ta_cmd]
           end
         when "down"
-          if @textarea.line_count <= 1
+          if @textarea.line_count <= 1 || @textarea.row == @textarea.line_count - 1
             navigate_history(:down)
             return [self, Bubbletea.none]
           else
diff --git a/lib/claw/version.rb b/lib/claw/version.rb
index 7284284..63a820a 100644
--- a/lib/claw/version.rb
+++ b/lib/claw/version.rb
@@ -2,5 +2,5 @@
 
 module Claw
   VERSION = "0.2.2"
-  BUILD = "20260407-011"
+  BUILD = "20260407-014"
 end
diff --git a/spec/claw/tui/model_spec.rb b/spec/claw/tui/model_spec.rb
index 7629bec..cd4ca2f 100644
--- a/spec/claw/tui/model_spec.rb
+++ b/spec/claw/tui/model_spec.rb
@@ -353,6 +353,35 @@ def submit(model, text)
       expect(model.textarea.value).to eq("only_one")
     end
 
+    it "navigates history from first line of multi-line content" do
+      submit(model, "def abc\n  1\nend")
+      submit(model, "2 + 2")
+      # Navigate up to "2 + 2"
+      model.update(make_key("up"))
+      expect(model.textarea.value).to eq("2 + 2")
+      # Navigate up again to multi-line entry
+      model.update(make_key("up"))
+      expect(model.textarea.value).to eq("def abc\n  1\nend")
+      # Cursor is on last line (row == line_count - 1 after value= sets cursor to end)
+      # Navigate up — cursor on row 0 would navigate history, but cursor is at end
+      # so first up moves cursor to line 0, then next up navigates history
+    end
+
+    it "navigates history from last line of multi-line content via down" do
+      submit(model, "first")
+      submit(model, "second")
+      # Go to "first"
+      model.update(make_key("up"))
+      model.update(make_key("up"))
+      expect(model.textarea.value).to eq("first")
+      # Navigate down through entries
+      model.update(make_key("down"))
+      expect(model.textarea.value).to eq("second")
+      # Navigate down past last entry → empty
+      model.update(make_key("down"))
+      expect(model.textarea.value).to eq("")
+    end
+
     it "preserves saved input after up/down cycle" do
       model.textarea.value = "partial"
       model.update(make_key("a"))  # type 'a' to get "partiala" in textarea
@@ -397,6 +426,13 @@ def submit(model, text)
       expect(model.chat_history.size).to eq(before_count)
     end
 
+    it "completes user-defined private methods" do
+      submit(model, "def zzz_priv_test_method; 99; end")
+      model.textarea.value = "zzz_priv"
+      model.update(make_key("tab"))
+      expect(model.textarea.value).to eq("zzz_priv_test_method")
+    end
+
     it "completes slash commands" do
       model.textarea.value = "/sn"
       model.update(make_key("tab"))