fix(sse): drop the localDb barrel imports from chat and auth (#9380)

Merge-train validated (tip 6ce4effef8). Vitest failures confirmed as base-red (#9679).

config/quality/eslint-suppressions.json

@@ -1356,24 +1356,11 @@
       "count": 1
     }
   },
-  "src/sse/handlers/chat.ts": {
-    "no-restricted-imports": {
-      "count": 1
-    }
-  },
   "src/sse/handlers/chatHelpers.ts": {
     "no-restricted-imports": {
       "count": 1
     }
   },
-  "src/sse/services/auth.ts": {
-    "no-restricted-imports": {
-      "count": 1
-    },
-    "no-restricted-syntax": {
-      "count": 1
-    }
-  },
   "src/sse/services/model.ts": {
     "no-restricted-imports": {
       "count": 2

src/sse/handlers/chat.ts

@@ -54,11 +54,10 @@ import { promoteSuccessfulComboModel } from "@/lib/combos/autoPromote";
 import {
   deleteSessionAccountAffinity,
   evictSessionAccountAffinityForConnection,
-  getCachedSettings,
-  getCombos,
-  getCombosCacheVersion,
   getSessionAccountAffinity,
-} from "@/lib/localDb";
+} from "@/lib/db/sessionAccountAffinity";
+import { getCachedSettings, getCombosCacheVersion } from "@/lib/db/readCache";
+import { getCombos } from "@/lib/db/combos";
 import { resolveModelLockoutSettings } from "@/lib/resilience/modelLockoutSettings";
 import {
   ensureOpenAIStoreSessionFallback,
@@ -956,7 +955,7 @@ async function handleChatImplementation(
     const providerPrefix = resolvedModelStr.split("/")[0];
     if (providerPrefix) {
       try {
-        const { getComboByName } = await import("@/lib/localDb");
+        const { getComboByName } = await import("@/lib/db/combos");
         const routingCombo = await getComboByName(providerPrefix);
         if (routingCombo?.id) {
           routingComboId = routingCombo.id;

src/sse/services/auth.ts

@@ -2,16 +2,19 @@ import { randomUUID, createHash } from "crypto";
 import { extractGoogApiKeyHeader } from "./googApiKeyAuth.ts";
 import {
   getCachedRawProviderConnections,
-  getProviderConnections,
   getCachedProviderNodes,
-  validateApiKey,
+  getCachedSettings,
+} from "@/lib/db/readCache";
+import {
+  getProviderConnections,
   updateProviderConnection,
   resetConnectionBackoff,
-  getSettings,
-  getCachedSettings,
   touchConnectionLastUsed,
   clearConnectionErrorIfUnchanged,
-} from "@/lib/localDb";
+} from "@/lib/db/providers";
+import { validateApiKey } from "@/lib/db/apiKeys";
+import { getSettings } from "@/lib/db/settings";
+import { toNumber } from "@/shared/utils/numeric";
 import {
   createLazyConnectionView,
   toProviderConnection,
@@ -125,15 +128,6 @@ function toStringOrNull(value: unknown): string | null {
   return typeof value === "string" && value.trim().length > 0 ? value : null;
 }
 
-function toNumber(value: unknown, fallback = 0): number {
-  if (typeof value === "number" && Number.isFinite(value)) return value;
-  if (typeof value === "string" && value.trim().length > 0) {
-    const parsed = Number(value);
-    return Number.isFinite(parsed) ? parsed : fallback;
-  }
-  return fallback;
-}
-
 function toNullableNumber(value: unknown): number | null {
   if (value === null || value === undefined) return null;
   const parsed = toNumber(value, Number.NaN);