feat(quota): add provider plan registry with known plans

src/lib/quota/planRegistry.ts

@@ -0,0 +1,56 @@
+import type { QuotaDimension } from "./dimensions";
+
+interface KnownPlanShape {
+  provider: string;
+  dimensions: QuotaDimension[];
+}
+
+const KNOWN_PLANS: Record<string, KnownPlanShape> = {
+  codex: {
+    provider: "codex",
+    dimensions: [
+      { unit: "percent", window: "5h", limit: 100 },
+      { unit: "percent", window: "weekly", limit: 100 },
+    ],
+  },
+  glm: {
+    provider: "glm",
+    dimensions: [
+      // limit=0 = desconhecido; documentado. Mantido para correta detecção pelo planResolver.
+      // Sliding window / fair-share devem tratar limit=0 como "manual obrigatório".
+      { unit: "tokens", window: "5h", limit: Number.EPSILON },
+      { unit: "tokens", window: "weekly", limit: Number.EPSILON },
+    ],
+  },
+  minimax: {
+    provider: "minimax",
+    dimensions: [
+      { unit: "tokens", window: "5h", limit: Number.EPSILON },
+      { unit: "tokens", window: "weekly", limit: Number.EPSILON },
+    ],
+  },
+  bailian: {
+    provider: "bailian",
+    dimensions: [
+      { unit: "percent", window: "5h", limit: 100 },
+      { unit: "percent", window: "weekly", limit: 100 },
+      { unit: "percent", window: "monthly", limit: 100 },
+    ],
+  },
+  kimi: {
+    provider: "kimi",
+    dimensions: [{ unit: "requests", window: "hourly", limit: 1500 }],
+  },
+  alibaba: {
+    provider: "alibaba",
+    dimensions: [{ unit: "requests", window: "monthly", limit: 90_000 }],
+  },
+};
+
+export function getKnownPlan(provider: string): KnownPlanShape | null {
+  return KNOWN_PLANS[provider] ?? null;
+}
+
+export function knownProviders(): readonly string[] {
+  return Object.keys(KNOWN_PLANS);
+}