docs: file #391 — curated modern-only resolution list (user-directed)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/ISSUES.md

@@ -24,6 +24,22 @@ What does NOT go here:
 - Every session: scan OPEN issues at start; promote/close anything we touched during the session before ending.
 - Promoting to a Phase: mark as `DONE (promoted to Phase X)` + commit SHA where the Phase entry landed.
 
+## #391 — Resolution list: offer only modern modes from the monitor's real mode list (user-directed curation)
+
+**Status:** OPEN — filed 2026-08-13, user-directed ("we should only
+support modern resolutions. Not any old format"). Today's Resolution
+dropdown offers a list that includes legacy 4:3 modes (800x600 was
+pickable) and modes the desktop cannot host (3840x2160 on a 2560x1440
+desktop, which silently clamps). Replace it with: enumerate the actual
+monitor mode list (GLFW glfwGetVideoModes — the same enumeration #388's
+fullscreen mode-validation needs, one shared source), filter to modern
+widescreen families (16:9/16:10/21:9, sensible minimum size), and for
+windowed picks offer only sizes that fit the desktop work area. Retail
+showed every adapter mode including 4:3 — curating the list is a
+deliberate deviation; add its register row (intentional architecture,
+user-directed) in the implementing commit. Part of the display block
+(#376/#377/#388/#389/#390).
+
 ## #390 — UI windows stranded off-screen when the resolution shrinks (no retail reposition/clamp on display change)
 
 **Status:** OPEN — filed 2026-08-13 (user gate report: "If I go from a high