Attempt 2's proof frames showed two bugs, both now fixed from the live
evidence:
1. The #68183 install-button.png predated the installer UI restyle to the
'[ INSTALL ]' bracket look, so the template never matched and we fell
through to the position fallback. Re-captured install-button.png from a
real CI desktop frame (the actual rendered button).
2. The fallback then clicked the WRONG spot: ahk_exe's first WinGetPos
matched a hidden 16x16 helper window ('Window found at w=16 h=16' in
ahk.log), and BTN_FY=0.87 aimed below the real button anyway. The
button center measured at ~(0.50, 0.59) of the ~full-screen window.
Rewrite:
* WaitForRealWindow() skips phantom/hidden matches (requires w>400,h>300)
and returns the true rect; the installer window is then activated before
any click.
* Install-finished is now driven primarily by the authoritative
'bootstrap complete' line in bootstrap-installer.log (matches
BootstrapEvent::Complete), with the Launch template as a secondary
signal and a window-relative fallback click.
* Fallback clicks use the corrected (0.50, 0.59) window fraction.
Teknium
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