spawn Claude in fullscreen mode and route mouse-wheel to PgUp/PgDown

Spawn `claude` directly as the tmux command with
CLAUDE_CODE_NO_FLICKER=1 so Claude Code runs in its fullscreen TUI
mode (input box pinned at bottom, owns its own scrollback). Mouse
wheel events are converted to PgUp/PgDown key input — universal
scroll signal that Claude, less, vim normal mode all respect, and
sidesteps the mouse-mode-but-no-scroll dead end where TUI apps
capture mouse without binding the wheel.

Drops the 1000-row tmux canvas + SingleChildScrollView experiment
in favor of viewport-sized tmux and Claude's native bottom-pinning.

Makefile install target now kills the clide tmux server so the
new config takes effect immediately. Marked TEMP — to be removed
once we no longer need the rapid-iteration loop.

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

Makefile

@@ -170,9 +170,11 @@ ifeq ($(FLUTTER_OS),linux)
 	  > $(HOME)/.local/share/applications/net.schweitz.clide.desktop
 	@gtk-update-icon-cache -f -t $(HOME)/.local/share/icons/hicolor 2>/dev/null || true
 	@update-desktop-database $(HOME)/.local/share/applications 2>/dev/null || true
+	@tmux -L clide kill-server 2>/dev/null || true
 	@echo "installed: $(INSTALL_DIR)/clide -> $(INSTALL_PREFIX)/clide/clide"
 	@echo "desktop:   ~/.local/share/applications/net.schweitz.clide.desktop"
 	@echo "version:   $(VERSION)"
+	@echo "tmux:      clide socket killed (TEMP)"
 else ifeq ($(FLUTTER_OS),macos)
 	@mkdir -p $(HOME)/Applications
 	rm -rf $(HOME)/Applications/clide.app