Independent fixed offsets caused the timeline, map dock, tool panel, and zoom controls to overlap. Derive them from one layout function and scope collapse to the expanded timeline state.
The regression came from applying history-open styling to the outer acrylic shell during iteration. Keep the shell frame unchanged, confine the bottom edge treatment to the expanded header, and cover desktop and mobile geometry in Playwright.
Unify the Agent history extension with the header acrylic surface, preserve the full conversation body, and consolidate shared control and status styling.
Restore map flow and SCADA controller behavior, remove obsolete rendering paths, and extend regression coverage. Button press coverage now releases outside the target so state assertions cannot accidentally toggle the control.
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