feat: enable edit context options

frontend/src/app/workspace/chats/[thread_id]/page.tsx

@@ -114,6 +114,8 @@ export default function ChatPage() {
           className="max-w-(--container-width-md)"
           autoFocus={isNewThread}
           status={thread.isLoading ? "streaming" : "ready"}
+          context={threadContext}
+          onContextChange={setThreadContext}
           onSubmit={handleSubmit}
           onStop={handleStop}
         />

frontend/src/components/workspace/input-box.tsx

@@ -1,6 +1,6 @@
 import type { ChatStatus } from "ai";
-import { LightbulbIcon, LightbulbOffIcon } from "lucide-react";
-import { useCallback, type ComponentProps } from "react";
+import { CheckIcon, LightbulbIcon, LightbulbOffIcon } from "lucide-react";
+import { useCallback, useMemo, useState, type ComponentProps } from "react";
 
 import {
   PromptInput,
@@ -11,23 +11,70 @@ import {
   PromptInputTextarea,
   type PromptInputMessage,
 } from "@/components/ai-elements/prompt-input";
+import type { AgentThreadContext } from "@/core/threads";
 import { cn } from "@/lib/utils";
 
+import {
+  ModelSelector,
+  ModelSelectorContent,
+  ModelSelectorInput,
+  ModelSelectorItem,
+  ModelSelectorList,
+  ModelSelectorLogo,
+  ModelSelectorName,
+  ModelSelectorTrigger,
+  type ModelSelectorLogoProps,
+} from "../ai-elements/model-selector";
+
 import { Tooltip } from "./tooltip";
 
+const AVAILABLE_MODELS = [
+  { name: "deepseek-v3.2", displayName: "DeepSeek v3.2", provider: "deepseek" },
+  {
+    name: "doubao-seed-1.8",
+    displayName: "Doubao Seed 1.8",
+    provider: "doubao",
+  },
+];
+
 export function InputBox({
   className,
   autoFocus,
   status = "ready",
+  context,
+  onContextChange,
   onSubmit,
   onStop,
   ...props
 }: Omit<ComponentProps<typeof PromptInput>, "onSubmit"> & {
   assistantId?: string | null;
   status?: ChatStatus;
+  context: AgentThreadContext;
+  onContextChange?: (context: AgentThreadContext) => void;
   onSubmit?: (message: PromptInputMessage) => void;
   onStop?: () => void;
 }) {
+  const [modelDialogOpen, setModelDialogOpen] = useState(false);
+  const selectedModel = useMemo(
+    () => AVAILABLE_MODELS.find((m) => m.name === context.model),
+    [context.model],
+  );
+  const handleModelSelect = useCallback(
+    (model: string) => {
+      onContextChange?.({
+        ...context,
+        model,
+      });
+      setModelDialogOpen(false);
+    },
+    [onContextChange, context],
+  );
+  const handleThinkingToggle = useCallback(() => {
+    onContextChange?.({
+      ...context,
+      thinking_enabled: !context.thinking_enabled,
+    });
+  }, [onContextChange, context]);
   const handleSubmit = useCallback(
     async (message: PromptInputMessage) => {
       if (status === "streaming") {
@@ -62,13 +109,72 @@ export function InputBox({
       </PromptInputBody>
       <PromptInputFooter className="flex">
         <div>
-          <Tooltip content="">
-            <PromptInputButton>
-              <LightbulbOffIcon className="size-4" />
+          <Tooltip
+            content={
+              context.thinking_enabled ? (
+                <div className="tex-sm flex flex-col gap-1">
+                  <div>Thinking is enabled</div>
+                  <div className="opacity-50">Click to disable thinking</div>
+                </div>
+              ) : (
+                <div className="tex-sm flex flex-col gap-1">
+                  <div>Thinking is disabled</div>
+                  <div className="opacity-50">Click to enable thinking</div>
+                </div>
+              )
+            }
+          >
+            <PromptInputButton onClick={handleThinkingToggle}>
+              {context.thinking_enabled ? (
+                <LightbulbIcon className="text-primary size-4" />
+              ) : (
+                <LightbulbOffIcon className="size-4" />
+              )}
             </PromptInputButton>
           </Tooltip>
         </div>
         <div className="flex items-center gap-2">
+          <ModelSelector
+            open={modelDialogOpen}
+            onOpenChange={setModelDialogOpen}
+          >
+            <ModelSelectorTrigger asChild>
+              <PromptInputButton>
+                <ModelSelectorLogo
+                  className="size-4"
+                  provider={
+                    selectedModel?.provider as ModelSelectorLogoProps["provider"]
+                  }
+                />
+                <ModelSelectorName>
+                  {selectedModel?.displayName}
+                </ModelSelectorName>
+              </PromptInputButton>
+            </ModelSelectorTrigger>
+            <ModelSelectorContent>
+              <ModelSelectorInput placeholder="Search models..." />
+              <ModelSelectorList>
+                {AVAILABLE_MODELS.map((m) => (
+                  <ModelSelectorItem
+                    key={m.name}
+                    value={m.name}
+                    onSelect={() => handleModelSelect(m.name)}
+                  >
+                    <ModelSelectorLogo
+                      className="size-4"
+                      provider={m.provider}
+                    />
+                    <ModelSelectorName>{m.displayName}</ModelSelectorName>
+                    {m.name === context.model ? (
+                      <CheckIcon className="ml-auto size-4" />
+                    ) : (
+                      <div className="ml-auto size-4" />
+                    )}
+                  </ModelSelectorItem>
+                ))}
+              </ModelSelectorList>
+            </ModelSelectorContent>
+          </ModelSelector>
           <PromptInputSubmit
             className="rounded-full"
             variant="outline"