feat: fetch and pass previous weather entries through component tree

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/weather/WeatherBoard.tsx

@@ -28,6 +28,13 @@ interface Share {
   };
 }
 
+type PreviousEntry = {
+  performanceEmoji: string | null;
+  moralEmoji: string | null;
+  fluxEmoji: string | null;
+  valueCreationEmoji: string | null;
+};
+
 interface WeatherBoardProps {
   sessionId: string;
   currentUserId: string;
@@ -44,6 +51,7 @@ interface WeatherBoardProps {
     email: string;
   };
   canEdit: boolean;
+  previousEntries: Map<string, PreviousEntry>;
 }
 
 export function WeatherBoard({
@@ -53,6 +61,7 @@ export function WeatherBoard({
   shares,
   owner,
   canEdit,
+  previousEntries,
 }: WeatherBoardProps) {
   // Get all users who have access: owner + shared users
   const allUsers = useMemo(() => {
@@ -137,6 +146,7 @@ export function WeatherBoard({
               currentUserId={currentUserId}
               entry={entry}
               canEdit={canEdit}
+              previousEntry={previousEntries.get(entry.userId) ?? null}
             />
           ))}
         </tbody>