Refactor UI actions to use client action API instead of view methods

[oblomov-dev]

Summary

This PR refactors multiple demo apps to use the new client->action->gen() API for triggering UI actions (timers, focus, title, scroll) instead of calling view builder methods like _z2ui5()->timer(), _z2ui5()->focus(), and _z2ui5()->title(). This aligns with the framework's shift toward a more explicit action-based architecture.

Key Changes

• z2ui5_cl_demo_app_000: Replaced scroll state management (mt_scroll, mv_set_scroll) with a structured s_scroll variable. Removed view-based scrolling setup and replaced with client->action->gen() call using cs_event-scroll_to. Replaced lp_title() view method with client->action->gen() using cs_event-set_title_launchpad.

• z2ui5_cl_demo_app_073: Removed timer and URL state attributes (mv_url, mv_check_timer_active). Replaced view-based timer setup with direct client->action->gen() call using cs_event-open_new_tab when the button is clicked.

• z2ui5_cl_demo_app_064: Removed view-based timer setup. Added client->action->gen() call using cs_event-start_timer in the event handler when the timer completes.

• z2ui5_cl_demo_app_082: Removed view-based timer setup. Added client->action->gen() calls using cs_event-start_timer in both the event handler and view display method.

• z2ui5_cl_demo_app_049: Removed view-based timer setup. Added client->action->gen() calls using cs_event-start_timer in both the event handler and view display method.

• z2ui5_cl_demo_app_118: Removed _z2ui5()->title() view method call. Added client->action->gen() call using cs_event-set_title in the view display method.

• z2ui5_cl_demo_app_279: Removed _z2ui5()->focus() view method call. Added client->action->gen() call using cs_event-set_focus in the view display method.

• z2ui5_cl_demo_app_307: Removed _z2ui5()->title() view method call. Added client->action->gen() call using cs_event-set_title in the view display method.

• z2ui5_cl_demo_app_316: Removed _z2ui5()->title() view method call. Added client->action->gen() call using cs_event-set_title in the view display method.

• z2ui5_cl_demo_app_320: Removed _z2ui5()->title() view method call. Added client->action->gen() call using cs_event-set_title in the view display method.

Implementation Details

• All timer actions now use cs_event-start_timer with event name and delay in milliseconds as arguments.
• Title actions use cs_event-set_title or cs_event-set_title_launchpad with the title string as an argument.
• Focus actions use cs_event-set_focus with the control ID as an argument.
• Scroll actions use cs_event-scroll_to with ID, Y position, and X position as arguments.
• State management for transient UI actions (timers, URLs) has been removed from class attributes where the action is now triggered directly via the client API.

https://claude.ai/code/session_013vV6hf86priocTxjQCFC4v