feat(provider): add pipeline reasoning controls (#2373)

* feat(provider): add pipeline reasoning controls

* fix(provider): preserve local agent model compatibility

* refactor(web): use shadcn reasoning slider

* fix(runtime): stabilize reasoning chat delivery

* fix(provider): route reasoning controls by model family

* fix(provider): handle hosted Kimi reasoning protocols

* fix(provider): map qwen reasoning levels to budgets

* fix(provider): preserve think tags in streamed reasoning

* fix(provider): preserve reasoning tool metadata

* style(provider): satisfy ruff checks after merge

* fix(persistence): preserve reasoning migration compatibility

web/src/components/ui/slider.tsx

@@ -0,0 +1,36 @@
+import * as React from 'react';
+import * as SliderPrimitive from '@radix-ui/react-slider';
+
+import { cn } from '@/lib/utils';
+
+const Slider = React.forwardRef<
+  React.ComponentRef<typeof SliderPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof SliderPrimitive.Root>
+>(({ className, ...props }, ref) => (
+  <SliderPrimitive.Root
+    ref={ref}
+    data-slot="slider"
+    className={cn(
+      'relative flex w-full touch-none select-none items-center data-[disabled]:opacity-50',
+      className,
+    )}
+    {...props}
+  >
+    <SliderPrimitive.Track
+      data-slot="slider-track"
+      className="relative h-1.5 w-full grow overflow-hidden rounded-full bg-primary/20"
+    >
+      <SliderPrimitive.Range
+        data-slot="slider-range"
+        className="absolute h-full bg-primary"
+      />
+    </SliderPrimitive.Track>
+    <SliderPrimitive.Thumb
+      data-slot="slider-thumb"
+      className="block size-4 shrink-0 rounded-full border border-primary/50 bg-background shadow transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50"
+    />
+  </SliderPrimitive.Root>
+));
+Slider.displayName = SliderPrimitive.Root.displayName;
+
+export { Slider };