tooltips: tense-aware expiry (expires/expired) + a <60min 'N min' bucket in the shared relative_ts — TDD

The token + position-circle expiry tooltips hardcoded 'expires' and never
flipped to 'expired' once the time passed — a seat whose `cost_current_until`
(the 7d cost clock) lapsed still read 'expires 11:30 p.m.' (staging 2026-06-08).

- New `expiry_phrase(dt)` filter (lyric_extras): 'expires <when>' for a FUTURE
  datetime, 'expired <when>' for a PAST one — the verb carries the tense so the
  underlying `relative_ts` stays direction-agnostic. Wired into
  `Token.tooltip_expiry` + the position-circle `data-tt-expiry` (position-tooltip.js
  copies it verbatim, so no JS change).
- `relative_ts` gains a <60min → 'N min' bucket (buckets: 60min / 24h / 7d /
  12mo / >12mo). Per user-spec it stays SHARED, so scroll.html's provenance feed
  (+ post.html / my-games row-ts) now reads 'N min' for very recent events too.

TDD: relative_ts <60min past+future + the 1h boundary; expiry_phrase
none/future/past/wraps-relative_ts; billboard post-line test updated (3h→clock-
time, + new just-posted→'N min'). 727 lyric+billboard+gameboard ITs green.

Bundled (parallel work): rootvars.scss chroma-hue primaries brightened
(--priRd/Or/Gn/Tk/Bl/Id + --terGn).

[[project-position-circle-tooltips]]

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/static_src/scss/rootvars.scss

@@ -119,16 +119,16 @@
 
     /* Chroma Hues */
     // red (A-Fire)
-    --priRd: 233, 53, 37;
+    --priRd: 253, 73, 57;
     --secRd: 193, 43, 28;
     --terRd: 155, 31, 15;
     --quaRd: 119, 20,  4;
     --quiRd:  85, 11,  0;
     --sixRd:  54,  4,  0;
     // orange (B-Fire)
-    --priOr: 225, 133, 40;
+    --priOr: 245, 183, 90;
     --secOr: 187, 111, 30;
-    --terOr: 150,  88, 17;
+    --terOr: 130,  88, 17;
     --quaOr: 115,  67,  6;
     --quiOr:  82,  47,  0;
     --sixOr:  51,  29,  0;
@@ -147,14 +147,14 @@
     --quiLm:  47,  64, 15;
     --sixLm:  25,  40,  6;
     // green (A-Space)
-    --priGn:   0, 160, 75;
+    --priGn:   0, 240, 125;
     --secGn:   0, 135, 62;
-    --terGn:   0, 109, 48;
+    --terGn:   0, 99, 41;
     --quaGn:   0,  85, 35;
     --quiGn:   0,  62, 23;
     --sixGn:   0,  40, 12;
     // teal (B-Space)
-    --priTk:   0, 184, 162;
+    --priTk:   0, 204, 182;
     --secTk:   0, 154, 136;
     --terTk:   0, 125, 110;
     --quaTk:   0,  97,  85;
@@ -168,14 +168,14 @@
     --quiCy:   0,  67,  78;
     --sixCy:   0,  43,  52;
     // blue (B-Air)
-    --priBl:  20, 141, 205;
+    --priBl:  40, 181, 245;
     --secBl:  18, 119, 173;
     --terBl:   8,  95, 140;
     --quaBl:   3,  73, 109;
     --quiBl:   0,  52,  79;
     --sixBl:   0,  33,  51;
     // indigo (A-Water)
-    --priId:  79, 102, 212;
+    --priId:  111, 133, 244;
     --secId:  66,  88, 184;
     --terId:  53,  74, 156;
     --quaId:  44,  60, 131;