v2.3.0-sampling-params-ask-user: agent sampling params, ask_user_input in CoderPane, UX polish

Add top_p/top_k/min_p/presence_penalty to AGENTS.md frontmatter and thread
through inference (agents.ts parser → Agent type → stream-phase → sentinel
summaries). Null means omit from request body, preserving provider defaults.

Wire ask_user_input interactive card into both BooCoder frontends: the
CoderPane in BooChat's SPA (CoderMessageList now renders AskUserInputCard
instead of ToolCallLine for ask_user_input tool calls) and the standalone
coder SPA (MessageBubble + new AskUserInputCard + shadcn ui primitives).

Additional fixes: SessionLandingPage uses ChatInput with slash-command
support and lazy chat creation; Session.tsx hydrate-race fix for empty pane
promotion; AgentPicker wider dropdown with line-clamp; ModelPicker min-width;
Textarea converted to forwardRef; Recon agent added to AGENTS.md; codecontext
host port exposed in docker-compose.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/src/components/panes/CoderMessageList.tsx

@@ -2,6 +2,7 @@ import { useCallback, useEffect, useMemo, useRef, type ReactNode } from 'react';
 import { MarkdownRenderer } from '@/components/MarkdownRenderer';
 import { ToolCallGroup } from '@/components/ToolCallGroup';
 import { ToolCallLine, type ToolRun } from '@/components/ToolCallLine';
+import { AskUserInputCard } from '@/components/AskUserInputCard';
 import { wireToolCallToRun, type CoderToolCallWire } from '@/lib/coder-tools';
 
 export interface CoderMessageWire {
@@ -116,6 +117,11 @@ function groupToolRuns(items: RenderItem[]): RenderItem[] {
       continue;
     }
     const name = item.run.call.name;
+    if (name === 'ask_user_input') {
+      out.push(item);
+      i += 1;
+      continue;
+    }
     let j = i + 1;
     while (
       j < items.length &&
@@ -178,10 +184,11 @@ function CoderTextBubble({ message }: { message: CoderMessageWire }) {
 
 interface Props {
   messages: CoderTimelineWire[];
+  chatId?: string;
   footer?: ReactNode;
 }
 
-export function CoderMessageList({ messages, footer }: Props) {
+export function CoderMessageList({ messages, chatId, footer }: Props) {
   const endRef = useRef<HTMLDivElement>(null);
   const scrollRef = useRef<HTMLDivElement>(null);
   const isNearBottomRef = useRef(true);
@@ -216,6 +223,16 @@ export function CoderMessageList({ messages, footer }: Props) {
             return <CoderTextBubble key={item.message.id} message={item.message} />;
           }
           if (item.kind === 'tool_run') {
+            if (item.run.call.name === 'ask_user_input' && chatId) {
+              return (
+                <AskUserInputCard
+                  key={item.key}
+                  toolCall={item.run.call}
+                  toolResult={item.run.result}
+                  chatId={chatId}
+                />
+              );
+            }
             return <ToolCallLine key={item.key} run={item.run} />;
           }
           return <ToolCallGroup key={item.key} runs={item.runs} />;

apps/web/src/components/panes/CoderPane.tsx

@@ -703,6 +703,7 @@ export function CoderPane({
         ) : (
           <CoderMessageList
             messages={messages as CoderTimelineWire[]}
+            chatId={chatId}
             footer={
               activeTaskId && !permissionPrompt && sending === false ? (
                 <p className="text-xs text-muted-foreground animate-pulse">Agent running…</p>