audit popover and dialog

docs/CHECKLIST.md

@@ -14,9 +14,6 @@ is the first downstream consumer; its screens drive the order.
 Platform metric adoption continues one component at a time; each stop goes
 through the review gate and a gallery pass.
 
-- [ ] **Popover platform chrome** — overlay border gate; the anchor gap
-      through `Theme::spacing`.
-- [ ] **Dialog platform chrome** — overlay border gate.
 - [ ] **Toast platform chrome** — overlay border gate.
 - [ ] **Tooltip platform chrome** — overlay border gate.
 - [ ] **Alert platform chrome** — overlay border gate.
@@ -69,9 +66,9 @@ Gaps surfaced by the signed comparison; ordered by signed's usage.
       (GNOME gsettings `font-name`, KDE `kdeglobals font=`), per-source
       border + focus chrome (`Theme::borders`), and a per-platform spacing
       unit (`Theme::spacing`); overlay borders engage in dark mode, where
-      the elevation shadow barely reads and floating layers separate by
-      border instead. Components adopt the tokens one by one
-      (see Next and Queue)
+      floating layers separate by border instead of shadow — dark elevation
+      shadows are dropped entirely, since they only muddied the dark scrim.
+      Components adopt the tokens one by one (see Next and Queue)
 
 ### icons (`crates/icons`)
 
@@ -111,6 +108,13 @@ Gaps surfaced by the signed comparison; ordered by signed's usage.
       `Theme::spacing`, and every action row renders at the stated
       `menu_item_height` with content centered, so the stated metric is the
       whole row; rows carry debug selectors for headless geometry tests
+- [x] Popover platform chrome — the panel border behind
+      `Theme::borders.overlays` (and dark mode); the anchor gap is the
+      spacing unit and rides `anchored().offset`, not a margin, so the
+      window-edge clamp stays intact; the panel carries a debug selector
+- [x] Dialog platform chrome — the panel border behind
+      `Theme::borders.overlays` (and dark mode), taking the surface color
+      where the platform paints none
 - [x] Button, Checkbox, Switch, Radio + RadioGroup, Toggle, Link, Slider,
       Progress, Avatar (image + seeded pixel-art fallback)
 - [x] Spinner — painted ring + rotating-icon variant, indeterminate and