Refactor samples 011-020 to app guidelines

[oblomov-dev]

• Remove mv_/mo_ prefixes from all DATA attributes
• Move client and helper methods from PUBLIC to PROTECTED section
• Rename method names: set_view→view_display, z2ui5_on_→on_, render_tab_*→view_display, ui5_*→clean names
• Replace single quotes with backticks for all string literals
• Fix blank lines in class definitions and method bodies per coding conventions
• Use IF/ELSEIF lifecycle chain instead of IF/RETURN + CASE patterns
• Use inline check_on_event for ≤3 events, CASE for ≥4 events
• Extract view_display for apps where main() would exceed 50 lines
• Rename ty_row→ty_s_row, ty_chart→ty_s_chart, add ty_t_rows where used twice
• Replace && concatenation with string templates where variables are embedded
• Always use client->check_app_prev_stack() for shownavbutton

https://claude.ai/code/session_01HH52uVT6bQkXiuRChb1pz7