fix(providers): update the v6 SDK packages and fix Claude and Gemini settings

- Update ai to 6.0.300 and the @ai-sdk providers to their latest v6-line
  versions. @ai-sdk/anthropic 3.0.47 did not know claude-opus-4-7/4-8
  and capped their output at 32000 tokens; 3.0.127 allows 128000
- Drop the fine-grained-tool-streaming beta header for the Anthropic API:
  the provider now streams tool input per tool (eager_input_streaming)
- Claude 4.7 and later reject a non-default temperature/top_p/top_k and
  the extended thinking budget with a 400. A middleware retries once
  without them, so TEMPERATURE and *_THINKING_BUDGET_TOKENS no longer
  break those models
- Prompt caching also reaches Claude on the Anthropic API and OpenRouter;
  before, only Bedrock got a cache marker
- GOOGLE_TOP_K and GOOGLE_TOP_P never reached Gemini: they were sent as
  Google provider options, which drops them. They are call settings now.
  GOOGLE_CANDIDATE_COUNT and GOOGLE_REASONING_EFFORT, which the provider
  does not support, are removed
- Add @ai-sdk/openai-compatible as a direct dependency

lib/deprecated-params.ts

@@ -0,0 +1,90 @@
+import { wrapLanguageModel } from "ai"
+import { rejectionText } from "@/lib/output-token-limit"
+
+type WrappedModel = ReturnType<typeof wrapLanguageModel>
+
+/**
+ * Claude 4.7 and later answer a non-default temperature, top_p or top_k,
+ * and the extended thinking budget (thinking type "enabled"), with a 400.
+ * TEMPERATURE and the *_THINKING_BUDGET_TOKENS settings send exactly these.
+ */
+const DEPRECATED_PARAM =
+    /`?(?:temperature|top_p|top_k)`? is deprecated for this model|"?thinking\.type\.enabled"? is not supported/i
+
+interface CallParams {
+    temperature?: number
+    topP?: number
+    topK?: number
+    providerOptions?: Record<string, Record<string, unknown> | undefined>
+}
+
+/** Drop a thinking config of type "enabled" stored under key, if any. */
+function withoutEnabledThinking(
+    options: Record<string, unknown> | undefined,
+    key: string,
+): Record<string, unknown> | undefined {
+    const config = options?.[key] as { type?: string } | undefined
+    if (config?.type !== "enabled") return options
+    const { [key]: _, ...rest } = options as Record<string, unknown>
+    return rest
+}
+
+/**
+ * The params without the settings newer Claude models reject, or null when
+ * the error is about something else or there is nothing to drop. The model
+ * then runs with its own default sampling and thinking.
+ */
+export function withoutDeprecatedParams<T extends CallParams>(
+    error: unknown,
+    params: T,
+): T | null {
+    const text = rejectionText(error)
+    if (!text || !DEPRECATED_PARAM.test(text)) return null
+
+    const { temperature, topP, topK, ...rest } = params
+    const options = params.providerOptions
+    const anthropic = withoutEnabledThinking(options?.anthropic, "thinking")
+    const bedrock = withoutEnabledThinking(options?.bedrock, "reasoningConfig")
+    const changed =
+        temperature !== undefined ||
+        topP !== undefined ||
+        topK !== undefined ||
+        anthropic !== options?.anthropic ||
+        bedrock !== options?.bedrock
+    if (!changed) return null
+
+    return {
+        ...rest,
+        ...(options && {
+            providerOptions: {
+                ...options,
+                ...(anthropic && { anthropic }),
+                ...(bedrock && { bedrock }),
+            },
+        }),
+    } as T
+}
+
+/** Retry the stream once without the settings newer Claude models reject. */
+export function withDeprecatedParamsFallback(
+    model: WrappedModel,
+): WrappedModel {
+    return wrapLanguageModel({
+        model,
+        middleware: {
+            specificationVersion: "v3",
+            async wrapStream({ doStream, params, model: inner }) {
+                try {
+                    return await doStream()
+                } catch (error) {
+                    const retry = withoutDeprecatedParams(error, params)
+                    if (!retry) throw error
+                    console.warn(
+                        "[model params] Rejected sampling or thinking settings, retrying with the model defaults",
+                    )
+                    return await inner.doStream(retry)
+                }
+            },
+        },
+    })
+}