[e010rror]

UI & UX Improvements:

• Single Persistent Dialog Window: Refactored the installation flow (Parsing -> Confirmation -> Installing -> Success/Failed/Error) into a single persistent dialog (InstallFlowDialogFragment) that updates in-place without dismissing, closing, or flashing between stages.
• Consistent Layout & Divider Cleanup: Dynamically hides unused buttons (View.GONE) and explicit button-bar dividers when not flanked by visible buttons, ensuring clean 1-button centering during Parsing/Installing and symmetric 50/50 2-button splits during Confirmation/Completion without vertical resizing.
• Preserved TV D-Pad & Phone Touch Behavior: Kept universal D-Pad key handling for TV Box remotes and suppressed touch-mode focus highlights on phones and tablets.