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* Precise Seam: new full-coverage policy for Seam Blocked A Seam Blocked modifier that covers a whole perimeter now blocks it, like a perimeter painted red all round, instead of being skipped. It overrides painting and lower-priority modifiers, like Enforced and Neutral. A new warning names the modifier: "Seam Blocked modifier "<name>" of "<object>" covers an entire perimeter". It is shown only when a perimeter stays entirely Blocked after all weak modifiers. The full-containment warning now covers only Center, Left and Right. * Precise Seam: fix seams on perimeters blocked all round - SeamComparator::is_first_not_much_worse() compares the types first, so two Blocked candidates fall through like Neutral ones. On a perimeter blocked all round, by a whole Seam Blocked modifier or by red painting, Random put the seam on the closing vertex of every layer and Aligned stopped aligning. - The whole-perimeter Blocked warning flags only the highest whole zone, the one in effect. A lower whole zone it overwrites is no longer reported, and the candidate scan runs only when that zone is Blocked. - The warning msgids take the type name from the menu's "Seam Blocked" msgid. - PreciseSeamWarnings::set() shares the load-before-store idiom, and every weak segment records its modifier. - Tests: a whole Blocked perimeter gets the seams of an unmarked one under every seam position; overwritten whole Blocked zones are not reported. --------- Co-authored-by: Ian Bassi <ian.bassi@outlook.com>