fix(web/office): suppress ol counters on Recent picks list

The prose rule at prototype.css:835 paints ::before counters
("1.", "2.", "3.") on every `ol > li` inside .proto-section. The
office Recent picks list renders as bordered cards — .office-pick
zeroes the inline padding for that card layout, so the counter at
`left: 0` landed directly on top of the title's first character.

User-reported via screenshot: the digits were overlapping "B" of
Beth, "S" of Scott, "H" of How. Suppressed the counter for this
specific list shape with `.office-pick-list > li::before { content:
none }`. Behavior in other prose contexts (post bodies, comments,
editorial docs) is unchanged.

Author: xiaolai

web/src/styles/prototype.css

@@ -4149,6 +4149,14 @@ a.proto-inbox-chip:hover {
   padding: 0;
   margin: 0;
 }
+/* The .proto-section prose rules paint ::before counters on every
+ * `ol > li` (1., 2., 3.). Recent picks render as bordered cards, not
+ * a numbered list, and .office-pick zeroes the inline padding — so
+ * the counter at `left: 0` would overlap the title's first
+ * character. Suppress the counter for this specific list shape. */
+.office-pick-list > li::before {
+  content: none;
+}
 .office-pick {
   padding: var(--sp-20) 0;
   border-bottom: var(--bw-hair) solid var(--rule-hair);