fix(06-08): the pump's accepted fixes ride the chain's surfaces — puck + freshness (G7c)

- during guidance the pump consumed fixes without refreshing the chain's
  surfaces: the puck froze at the boot fix while the camera rode the
  snapped line (the UI-SPEC's recorded call: 'the puck ... carr[ies]
  progress'), and lastFix stayed at boot so the strip's 45s staleness
  law falsely flipped SIGNAL LOST mid-drive and re-ran the chain
- one injected dep (updatePuck) composes both in main.ts: lastFix = fix,
  marker.update (the RAW fix — the camera rides the SNAPPED foot, the
  two-authorities-one-line law), marker.setStale(false); the camera is
  NOT touched (the guidance camera owns the viewport — the guard
  handleLive already keeps)
- G7c pins the dep call per accepted fix + the main.ts source-scan for
  the marker composition (the RS2 boot-wiring shape)
- found while building the real-drive gate: any drive past 45s would
  have hit both defects on the road
- web 148/148, typecheck clean; captures regenerated 20/20

web/src/main.ts

@@ -450,6 +450,18 @@ async function boot(): Promise<void> {
     onGuidanceChange: () => {
       if (backSync !== null) backSync(); // confirm open/close + activation/teardown re-apply the graph
     },
+    // 06-08 G7c: the pump's fixes ride the chain's surfaces — the puck moves
+    // (the UI-SPEC's recorded call: the puck carries progress) and the
+    // chain's freshness axis stays live (a drive past 45s never flips
+    // SIGNAL LOST while fixes flow). The camera is NOT touched here: the
+    // guidance camera owns the viewport (the same guard handleLive keeps).
+    updatePuck: (fix) => {
+      lastFix = fix;
+      if (map !== null) {
+        marker.update(map, fix);
+        marker.setStale(false);
+      }
+    },
     fetchImpl: fetch.bind(globalThis),
     bearer: getSession,
   });