feat(treasury): drop Member Activity and the source tiles, name the subnet

Three changes to /treasury, grouped because they all touch the same page and
the same area of it.

Member Activity leaves the treasury page. The chart, its hook and its i18n keys
all stay — HomeStaticContent still renders it — so this removes the usage, not
the component. The chart row goes from three columns to two.

The inflow source tiles go too. Their aggregate ("Subnet · 5 entries") was the
summary above the list; the per-row badges stay, since telling each credit apart
is what that panel is for. `inflows.entries` and `inflows.sources` were left
orphaned and are removed.

The badge reads "Morpheus Subnet" instead of "Subnet", and that rename has a
consequence worth spelling out. The tagging rule treats every USDC credit from
the SplitsWarehouse as subnet income, which holds only because the subnet split
is currently the sole 0xSplits paying this treasury. The first rider sponsorship
payout will leave the same address — and where "Subnet" was vague enough to slip
by, "Morpheus Subnet" would put a specific false claim on a public treasury page.
The warning beside `splitsAmbiguous` now says so directly: disambiguating stopped
being cosmetic the day that string changed.

i18n parity: 52 keys per locale, identical order.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: sktbrd

messages/en/treasury.json

@@ -73,10 +73,8 @@
     "auction": "Auction",
     "auctionHint": "Arrived from the auction house as an internal transfer",
     "viewTx": "View transaction on Basescan",
-    "sources": "By source",
-    "subnet": "Subnet",
+    "subnet": "Morpheus Subnet",
     "splits": "Splits",
-    "transfer": "Transfer",
-    "entries": "entries"
+    "transfer": "Transfer"
   }
 }

messages/pt-br/treasury.json

@@ -73,10 +73,8 @@
     "auction": "Leilão",
     "auctionHint": "Chegou do contrato de leilão como transferência interna",
     "viewTx": "Ver transação no Basescan",
-    "sources": "Por fonte",
-    "subnet": "Subnet",
+    "subnet": "Morpheus Subnet",
     "splits": "Splits",
-    "transfer": "Transferência",
-    "entries": "entradas"
+    "transfer": "Transferência"
   }
 }

src/app/[locale]/treasury/page.tsx

@@ -65,13 +65,6 @@ const ProposalsPerMonthChart = dynamic(
     })),
   { loading: () => <div className="h-[300px] rounded-xl bg-muted animate-pulse" /> },
 );
-const MemberActivityChart = dynamic(
-  () =>
-    import("@/components/treasury/MemberActivityChart").then((mod) => ({
-      default: mod.MemberActivityChart,
-    })),
-  { loading: () => <div className="h-[300px] rounded-xl bg-muted animate-pulse" /> },
-);
 
 export default async function TreasuryPage({ params }: { params: Promise<{ locale: string }> }) {
   const { locale } = await params;
@@ -136,16 +129,13 @@ export default async function TreasuryPage({ params }: { params: Promise<{ local
         </div>
 
         {/* Charts */}
-        <div className="grid grid-cols-1 gap-6 lg:grid-cols-3">
+        <div className="grid grid-cols-1 gap-6 lg:grid-cols-2">
           <div className="lg:col-span-1 min-w-0">
             <AuctionBidsPerMonthChart />
           </div>
           <div className="lg:col-span-1 min-w-0">
             <ProposalsPerMonthChart />
           </div>
-          <div className="lg:col-span-1 min-w-0">
-            <MemberActivityChart />
-          </div>
         </div>
 
         {/* Holdings, paired: fungible on the left, the Gnars themselves on the

src/components/treasury/TreasuryInflows.tsx

@@ -76,30 +76,6 @@ export async function TreasuryInflows({ locale }: { locale: string }) {
         </CardTitle>
       </CardHeader>
       <CardContent>
-        {inflows.length > 0 ? (
-          <div className="mb-3 grid grid-cols-2 gap-2 sm:grid-cols-4">
-            {(["auction", "subnet", "splits", "transfer"] as const)
-              .map((src) => ({
-                src,
-                rows: inflows.filter((f) => f.source === src),
-              }))
-              .filter(({ rows }) => rows.length > 0)
-              .map(({ src, rows }) => (
-                <div key={src} className="rounded-lg border border-border bg-muted/40 p-2.5">
-                  <div
-                    className={`inline-flex items-center rounded-full border px-1.5 py-0.5 text-[10px] font-semibold ${SOURCE_TONE[src]}`}
-                  >
-                    {t(src)}
-                  </div>
-                  <div className="mt-1.5 font-mono text-sm font-semibold tabular-nums">
-                    {rows.length}
-                  </div>
-                  <div className="text-[11px] text-muted-foreground">{t("entries")}</div>
-                </div>
-              ))}
-          </div>
-        ) : null}
-
         {inflows.length === 0 ? (
           <p className="py-6 text-center text-sm text-muted-foreground">{t("empty")}</p>
         ) : (

src/services/treasury-inflows.ts

@@ -138,6 +138,17 @@ export const loadTreasuryInflows = cache(
           // rider split has distributed yet. Until one has, warehouse credits are
           // unambiguously subnet; after that they degrade to the honest `splits`
           // rather than silently claiming the wrong origin.
+          //
+          // READ THIS BEFORE TOUCHING THE `subnet` BRANCH. The label users see is
+          // no longer the vague "Subnet" — it now reads "Morpheus Subnet", which
+          // names a specific product. So the failure mode changed with it: the
+          // first rider sponsorship payout would not just be filed under a fuzzy
+          // heading, it would appear on a public treasury page as Morpheus
+          // earnings when it is nothing of the sort. Disambiguating stopped being
+          // cosmetic the day that string was renamed. `splitsAmbiguous` and the
+          // `splits` tag exist precisely so that day costs one flag, not a
+          // redesign — set it and these rows degrade to an honest label instead
+          // of asserting a false origin.
           const source: InflowSource =
             from === DAO_ADDRESSES.auction.toLowerCase()
               ? "auction"