fix(test): retype petProfileSummary chain mock to satisfy tsc --project build

CI failed on PR #137 because `tsc --project .` (the build path used by the
Docker image) is stricter than `pnpm typecheck` was reporting during local
iteration — two TS2322 errors surfaced in the new mock:

  1. `chain.from = (table: { _name: string }) => ...` was assigned through
     a `Record<string, (...args: unknown[]) => unknown>` index signature,
     and `{ _name: string }` is not assignable from `unknown`.
  2. `chain.then = (onFulfilled?: (v: unknown[]) => unknown) => ...` was
     not assignable to the `PromiseLike<T>.then` signature TS now infers
     for the awaitable, because TS expects `onfulfilled` to also accept
     `null`.

Replace the proxy-based loose chain with a typed `ChainLike` interface so
the build typechecker is satisfied. Behaviour is unchanged — all 7 GRO-2014
regression tests still pass.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/__tests__/petProfileSummary.test.ts

@@ -81,12 +81,14 @@ function resetDb() {
 }
 
 // ─── @groombook/db mock ──────────────────────────────────────────────────────
+//
+// Each select chain needs to know which table it's targeting and which columns
+// it's projecting so we can return the right mocked rows. We thread that state
+// through a per-call object whose chain methods all return `this`. The chain
+// is also `then`-able so any `await` position resolves to the rows.
 
 vi.mock("@groombook/db", () => {
-  // Each "select chain" needs to know which table it's targeting so we can
-  // hand back the right mocked rows. We can't tell tables apart by reference
-  // in Drizzle-land, so use named proxies and inspect them in `from()`.
-  const named = (name: string) =>
+  const namedTable = (name: string) =>
     new Proxy(
       { _name: name },
       {
@@ -97,27 +99,28 @@ vi.mock("@groombook/db", () => {
       }
     );
 
-  const pets = named("pets");
-  const appointments = named("appointments");
-  const services = named("services");
-  const staff = named("staff");
+  const pets = namedTable("pets");
+  const appointments = namedTable("appointments");
+  const services = namedTable("services");
+  const staff = namedTable("staff");
 
-  function buildSelect(projection?: Record<string, unknown>) {
+  // The full chain interface is intentionally loose — only `then` is exposed
+  // with a typed signature so vitest's await resolves to the right shape.
+  interface ChainLike {
+    from: (table: { _name: string }) => ChainLike;
+    where: (...args: unknown[]) => ChainLike;
+    innerJoin: (...args: unknown[]) => ChainLike;
+    leftJoin: (...args: unknown[]) => ChainLike;
+    orderBy: (...args: unknown[]) => ChainLike;
+    limit: (...args: unknown[]) => ChainLike;
+    then: <T = unknown[]>(
+      onfulfilled?: ((value: unknown[]) => T | PromiseLike<T>) | null
+    ) => Promise<T>;
+  }
+
+  function buildSelect(projection?: Record<string, unknown>): ChainLike {
     let targetTable = "";
-    const chain: Record<string, (...args: unknown[]) => unknown> = {};
 
-    chain.from = (table: { _name: string }) => {
-      targetTable = table._name;
-      return chain;
-    };
-    chain.innerJoin = () => chain;
-    chain.leftJoin = () => chain;
-    chain.orderBy = () => chain;
-    chain.limit = () => chain;
-
-    // .where(...) on the pets-select is the terminal call in the route — it
-    // is awaited directly. Other queries chain through .limit/.orderBy. We
-    // make every chain "thenable" so any await position resolves to rows.
     const resolveRows = (): unknown[] => {
       if (targetTable === "pets") {
         if (dbState.throwOnPetSelect) {
@@ -126,11 +129,6 @@ vi.mock("@groombook/db", () => {
         return dbState.petRow ? [dbState.petRow] : [];
       }
       if (targetTable === "appointments") {
-        // Disambiguate by projection shape:
-        //   - linkage check projects `{ id: appointments.id }`
-        //   - recentHistory projects multiple columns including serviceName
-        //   - visit count projects `{ count: ... }`
-        //   - upcoming projects multiple columns including confirmationStatus
         const keys = projection ? Object.keys(projection) : [];
         if (projection && keys.length === 1 && keys[0] === "id") {
           return dbState.linkageRow ? [dbState.linkageRow] : [];
@@ -145,16 +143,31 @@ vi.mock("@groombook/db", () => {
       }
       return [];
     };
-    chain.where = (..._args: unknown[]) => {
-      // After .where, the chain is still awaitable. Return chain itself so
-      // .limit/.orderBy can follow, but also expose `then` for the case
-      // where .where is the last call (pets-select).
-      return chain;
+
+    const chain: ChainLike = {
+      from(table) {
+        targetTable = table._name;
+        return chain;
+      },
+      where() {
+        return chain;
+      },
+      innerJoin() {
+        return chain;
+      },
+      leftJoin() {
+        return chain;
+      },
+      orderBy() {
+        return chain;
+      },
+      limit() {
+        return chain;
+      },
+      then(onfulfilled) {
+        return Promise.resolve(resolveRows()).then(onfulfilled ?? undefined);
+      },
     };
-    // Make the whole chain thenable so any await position works.
-    (chain as unknown as PromiseLike<unknown[]>).then = (
-      onFulfilled?: (v: unknown[]) => unknown
-    ) => Promise.resolve(resolveRows()).then(onFulfilled);
 
     return chain;
   }
@@ -167,14 +180,13 @@ vi.mock("@groombook/db", () => {
     appointments,
     services,
     staff,
-    and: vi.fn((..._args: unknown[]) => ({ _op: "and" })),
-    or: vi.fn((..._args: unknown[]) => ({ _op: "or" })),
-    eq: vi.fn((..._args: unknown[]) => ({ _op: "eq" })),
+    and: vi.fn(() => ({ _op: "and" })),
+    or: vi.fn(() => ({ _op: "or" })),
+    eq: vi.fn(() => ({ _op: "eq" })),
     desc: vi.fn((arg: unknown) => arg),
     exists: vi.fn((arg: unknown) => arg),
     sql: Object.assign(
-      (..._args: unknown[]) => ({ _op: "sql" }),
-      // tag template fallback
+      () => ({ _op: "sql" }),
       { [Symbol.toPrimitive]: () => "sql" }
     ),
   };