chore(lint): adopt canonical golangci-lint config

Replace .golangci.yml with the shared canonical config. The old
config's top-level linters-settings block was silently ignored under
the v2 schema, so the lll/funlen/cyclop/dupl thresholds now actually
apply. The four repo-specific disables (mnd, exhaustive, paralleltest,
testpackage) move out of the config into targeted in-code nolint
directives carrying their original approval dates, keeping the config
byte-identical to the canonical one.

Fixes surfaced by the stricter settings: t.Parallel() added to all 32
tests, 24 overlong lines wrapped or their comments tightened, tcell
control-code returns rewritten as character literals, dupl markers on
the identically-shaped item data tables, and two wsl_v5 defer cuddles.

No behavior changes. The repo has no golangci-lint version pin (no
Dockerfile or CI; make lint runs the host binary, currently v2.12.2),
so there was nothing to bump.

game/rip.go

@@ -1,3 +1,4 @@
+//nolint:mnd // C-faithful literals; names hurt C-greppability (approved 2026-07-07)
 package game
 
 import (
@@ -98,8 +99,10 @@ func (g *RogueGame) totalWinner() {
 	}
 
 	g.standend()
-	g.scr.Std.MvAddStr(10, 0, "You have joined the elite ranks of those who have escaped the")
-	g.scr.Std.MvAddStr(11, 0, "Dungeons of Doom alive.  You journey home and sell all your loot at")
+	g.scr.Std.MvAddStr(10, 0,
+		"You have joined the elite ranks of those who have escaped the")
+	g.scr.Std.MvAddStr(11, 0,
+		"Dungeons of Doom alive.  You journey home and sell all your loot at")
 	g.scr.Std.MvAddStr(12, 0, "a great profit and are admitted to the Fighters' Guild.")
 	g.mvaddstr(NumLines-1, 0, "--Press space to continue--")
 	g.refresh()
@@ -132,6 +135,7 @@ func (g *RogueGame) objectWorth(obj *Object) int {
 	it := &g.Items
 	worth := 0
 
+	//nolint:exhaustive // C-faithful: only the cases C handled (approved 2026-07-07)
 	switch obj.Kind {
 	case KindFood:
 		worth = 2 * obj.Count