fix: enable clipboard paste (Ctrl+V) in text input components

The textinput component's paste functionality is asynchronous - when
Ctrl+V is pressed, it returns a Paste command that reads from clipboard
and returns an internal pasteMsg. This message needs to be forwarded
back to textinput.Update() to actually insert the text.

Previously, only tea.KeyMsg was routed to input components, so pasteMsg
was never delivered. Added a default case in App.Update() to forward
unhandled messages to active textinput-based components (ConnectionDialog
and SearchInput).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: rebelice

internal/app/app.go

@@ -1384,6 +1384,20 @@ func (a *App) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		a.state.Width = msg.Width
 		a.state.Height = msg.Height
 		a.updatePanelDimensions()
+
+	default:
+		// Forward other messages (like textinput's internal pasteMsg) to active input components
+		// This enables clipboard paste functionality (Ctrl+V) in text inputs
+		// Only components that use charmbracelet/bubbles/textinput need these messages
+		var cmd tea.Cmd
+		if a.showConnectionDialog {
+			a.connectionDialog, cmd = a.connectionDialog.Update(msg)
+			return a, cmd
+		}
+		if a.showSearch {
+			a.searchInput, cmd = a.searchInput.Update(msg)
+			return a, cmd
+		}
 	}
 	return a, nil
 }