add the interface half of the duck suite design language

DuckSuite_Design_Language.md covers icons only — mascot geometry, lighting,
one-idea-per-icon, readable at 64px. It says nothing about type, density or
data, which is why the chrome looks considered and every data view does not.
This is the companion document plus the primitives that enforce it.

The diagnosis it is written against, from grepping two apps: 11 uses of
text-[10px], 7 of text-[11px], 52 of text-xs and 3 of text-base, with no rule
about which meant what; six radius values; hand-picked emerald/amber/red/purple
next to unused --success/--warning/--destructive tokens; text-black/50 and
ring-black/5, which are invisible in dark mode. None of that was a bad decision,
it was the absence of one thirty times over — so the fix is to remove the choice
rather than to have better taste.

docs/design-language-interface.md sets four type ranks with a 12px floor, one
focal point per row, five state tones, three radii and a spacing rhythm. The
principles are lifted from the icon language rather than invented, because
"one focal point, reads instantly, no unnecessary decorations, if it needs
explanation it is too complicated" is already the right rule for a dense list.

components/Data/ is how you spend that vocabulary: DataRow/DataList/RowMeta,
StatusPill/StatusIcon, LoadingBlock/ErrorBlock/EmptyBlock, RelativeTime. Rules
you have to remember are rules thirty views already broke, so the shape encodes
them — DataRow takes exactly one title and everything else is meta, RowMeta
puts separators between items so a trailing dot cannot appear, RelativeTime
carries the absolute timestamp as a hover title.

Adds --info (violet) as the fifth semantic tone, light and dark. "Merged" and
"in progress" are neither good news nor bad, and painting them with --success
makes a merged PR and an open one look like the same thing.

Entirely additive: nothing imports these yet, so no existing view changes and
there is no collision with the other agent working in this tree. Typechecks
clean. Not yet rendered in a browser.

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

src/apps/officer-web/styles/globals.css

@@ -48,6 +48,9 @@
   --color-warning: hsl(var(--warning));
   --color-warning-foreground: hsl(var(--warning-foreground));
 
+  --color-info: hsl(var(--info));
+  --color-info-foreground: hsl(var(--info-foreground));
+
   --color-muted: hsl(var(--muted));
   --color-muted-foreground: hsl(var(--muted-foreground));
 
@@ -184,6 +187,12 @@
     --warning: 43 96% 56%;
     --warning-foreground: 0 0% 0%;
 
+    /* The fifth state tone. "In progress" and "merged" are neither good news nor bad, and painting
+       them with --success makes a merged PR and an open one look like the same thing. Violet because
+       it has to stay legible next to success green and destructive red at pill size. */
+    --info: 263 70% 50%;
+    --info-foreground: 0 0% 100%;
+
     --border: 214.3 31.8% 91.4%;
     --input: 214.3 31.8% 91.4%;
     --ring: 222.2 84% 4.9%;
@@ -267,6 +276,11 @@
     --warning: 43 96% 56%;
     --warning-foreground: 0 0% 0%;
 
+    /* Lifted well above the light value — 50% lightness violet on a near-black background reads as
+       muddy grey at 12px, which is exactly the size it is used at. */
+    --info: 263 90% 70%;
+    --info-foreground: 0 0% 100%;
+
     --border: 217.2 32.6% 17.5%;
     --input: 217.2 32.6% 17.5%;
     --ring: 212.7 26.8% 83.9%;