feat: claude max oauth support with multi-account switching, reasoning effort, and dynamic model listing

8 files changed, 342 insertions, 20 deletions

diff --git a/packages/frontend/src/lib/chat.svelte.ts b/packages/frontend/src/lib/chat.svelte.ts
index 9559f20..e211203 100644
--- a/packages/frontend/src/lib/chat.svelte.ts
+++ b/packages/frontend/src/lib/chat.svelte.ts
@@ -16,13 +16,23 @@ function makeDebugInfo(overrides: Partial<DebugInfo> = {}): DebugInfo {
 	};
 }
 
-function formatConversation(msgs: ChatMessage[]): string {
+function formatConversation(msgs: ChatMessage[], activeModelId: string | null): string {
 	const lines: string[] = [];
 	lines.push("=== Dispatch Conversation ===");
 	lines.push(`Exported: ${new Date().toISOString()}`);
+	lines.push(`Active Model: ${activeModelId ?? "default"}`);
 	lines.push("");
 
 	for (const msg of msgs) {
+		if (msg.role === "system") {
+			lines.push(`--- System ---`);
+			for (const seg of msg.content) {
+				if (seg.type === "text") lines.push(seg.text);
+			}
+			lines.push("");
+			continue;
+		}
+
 		const role = msg.role === "user" ? "User" : "Assistant";
 		lines.push(`--- ${role} ---`);
 
@@ -67,6 +77,9 @@ function formatConversation(msgs: ChatMessage[]): string {
 function createChatStore() {
 	let messages: ChatMessage[] = $state([]);
 	let agentStatus: "idle" | "running" | "error" = $state("idle");
+	let activeKeyId: string | null = $state(null);
+	let activeModelId: string | null = $state(null);
+	let reasoningEffort: string = $state("max");
 	let isConnected = $state(false);
 	let currentAssistantId: string | null = null;
 	let pendingPermissions: PermissionPrompt[] = $state([]);
@@ -147,16 +160,15 @@ function createChatStore() {
 				ensureCurrentAssistantMessage();
 				messages = messages.map((m) => {
 					if (m.id === currentAssistantId) {
-						const segments: ContentSegment[] = [
-							...m.content,
-							{
-								type: "tool-call",
-								id: event.toolCall.id,
-								name: event.toolCall.name,
-								arguments: event.toolCall.arguments,
-								isExpanded: false,
-							},
-						];
+					const segments: ContentSegment[] = [
+						...m.content,
+						{
+							type: "tool-call",
+							id: event.toolCall.id,
+							name: event.toolCall.name,
+							arguments: event.toolCall.arguments,
+						},
+					];
 						return { ...m, content: segments };
 					}
 					return m;
@@ -266,7 +278,11 @@ function createChatStore() {
 			const res = await fetch(url, {
 				method: "POST",
 				headers: { "Content-Type": "application/json" },
-				body: JSON.stringify({ message: text }),
+				body: JSON.stringify({ 
+					message: text,
+					...(activeKeyId && activeModelId ? { keyId: activeKeyId, modelId: activeModelId } : {}),
+					reasoningEffort,
+				}),
 			});
 			if (!res.ok) {
 				const body = await res.text();
@@ -301,7 +317,35 @@ function createChatStore() {
 	}
 
 	function copyConversation(): string {
-		return formatConversation(messages);
+		return formatConversation(messages, activeModelId);
+	}
+
+	function changeModel(keyId: string, modelId: string) {
+		const previousModel = activeModelId;
+		activeKeyId = keyId;
+		activeModelId = modelId;
+
+		if (previousModel && previousModel !== modelId) {
+			const systemMsg: ChatMessage = {
+				id: generateId(),
+				role: "system",
+				content: [{ type: "text", text: `Model changed from ${previousModel} to ${modelId}` }],
+			};
+			messages = [...messages, systemMsg];
+		} else if (!previousModel) {
+			const systemMsg: ChatMessage = {
+				id: generateId(),
+				role: "system",
+				content: [{ type: "text", text: `Model set to ${modelId}` }],
+			};
+			messages = [...messages, systemMsg];
+		}
+	}
+
+	function setKey(keyId: string) {
+		activeKeyId = keyId;
+		// Clear model when key changes since available models depend on the key
+		activeModelId = null;
 	}
 
 	function replyPermission(id: string, reply: "once" | "always" | "reject") {
@@ -358,6 +402,12 @@ function createChatStore() {
 		replyPermission,
 		copyConversation,
 		clear,
+		changeModel,
+		setKey,
+		get activeKeyId() { return activeKeyId; },
+		get activeModelId() { return activeModelId; },
+		get reasoningEffort() { return reasoningEffort; },
+		set reasoningEffort(value: string) { reasoningEffort = value; },
 	};
 }
 
diff --git a/packages/frontend/src/lib/components/ChatMessage.svelte b/packages/frontend/src/lib/components/ChatMessage.svelte
index 387dbdc..c8b3f6e 100644
--- a/packages/frontend/src/lib/components/ChatMessage.svelte
+++ b/packages/frontend/src/lib/components/ChatMessage.svelte
@@ -6,8 +6,20 @@ import ToolCallDisplay from "./ToolCallDisplay.svelte";
 const { message }: { message: ChatMessage } = $props();
 
 const isUser = $derived(message.role === "user");
+const isSystem = $derived(message.role === "system");
 </script>
 
+{#if isSystem}
+	<div class="flex justify-center my-2">
+		<div class="badge badge-ghost gap-1 text-xs opacity-60">
+			{#each message.content as segment}
+				{#if segment.type === "text"}
+					{segment.text}
+				{/if}
+			{/each}
+		</div>
+	</div>
+{:else}
 <div class="chat chat-start mb-2">
 	<div class="chat-bubble max-w-[80%] break-words {isUser ? 'chat-bubble-primary' : 'bg-transparent'}">
 		{#if message.thinking}
@@ -31,3 +43,4 @@ const isUser = $derived(message.role === "user");
 		{/if}
 	</div>
 </div>
+{/if}
diff --git a/packages/frontend/src/lib/components/Header.svelte b/packages/frontend/src/lib/components/Header.svelte
index 5d14593..721a773 100644
--- a/packages/frontend/src/lib/components/Header.svelte
+++ b/packages/frontend/src/lib/components/Header.svelte
@@ -30,7 +30,7 @@ async function handleCopy() {
 	</div>
 	<div class="navbar-end flex items-center gap-3">
 		<span class="text-xs text-base-content/60 hidden sm:block">
-			DeepSeek V4 Flash via OpenCode Go
+			{chatStore.activeModelId ?? "Default Model"}
 		</span>
 		<button
 			type="button"
diff --git a/packages/frontend/src/lib/components/MarkdownRenderer.svelte b/packages/frontend/src/lib/components/MarkdownRenderer.svelte
index f9925c6..f73140f 100644
--- a/packages/frontend/src/lib/components/MarkdownRenderer.svelte
+++ b/packages/frontend/src/lib/components/MarkdownRenderer.svelte
@@ -92,9 +92,10 @@
 
 		const promise = (async () => {
 			try {
-				// Vite resolves this template literal at build time into a glob
-				// over all matching language modules, so each is a separate chunk.
-				const mod = await import(`highlight.js/lib/languages/${name}`);
+				// Dynamic import for languages not in the hot set above.
+				// @vite-ignore: the variable `name` is intentionally dynamic;
+				// missing modules are caught by the try/catch below.
+				const mod = await import(/* @vite-ignore */ `highlight.js/lib/languages/${name}`);
 				hljs.registerLanguage(name, mod.default);
 				return true;
 			} catch {
diff --git a/packages/frontend/src/lib/components/ModelSelector.svelte b/packages/frontend/src/lib/components/ModelSelector.svelte
new file mode 100644
index 0000000..b88b2e3
--- /dev/null
+++ b/packages/frontend/src/lib/components/ModelSelector.svelte
@@ -0,0 +1,187 @@
+<script module>
+	const modelCache = new Map<string, string[]>();
+</script>
+
+<script lang="ts">
+	import type { KeyInfo } from "../types.js";
+	import { config } from "../config.js";
+
+	// Moves an element to document.body so modals escape the sidebar's
+	// transform stacking context and cover the full viewport.
+	function portal(node: HTMLElement) {
+		document.body.appendChild(node);
+		return {
+			destroy() {
+				node.remove();
+			},
+		};
+	}
+
+	const {
+		keys = [],
+		activeKeyId = null,
+		activeModelId = null,
+		reasoningEffort = "max",
+		onKeyChange,
+		onModelChange,
+		onReasoningChange,
+	}: {
+		keys?: KeyInfo[];
+		activeKeyId?: string | null;
+		activeModelId?: string | null;
+		reasoningEffort?: string;
+		onKeyChange: (keyId: string) => void;
+		onModelChange: (keyId: string, modelId: string) => void;
+		onReasoningChange: (effort: string) => void;
+	} = $props();
+
+	let showKeyModal = $state(false);
+	let showModelModal = $state(false);
+	let availableModels = $state<string[]>([]);
+	let loadingModels = $state(false);
+	let modelError = $state<string | null>(null);
+
+	function selectKey(keyId: string) {
+		showKeyModal = false;
+		onKeyChange(keyId);
+	}
+
+	async function openModelModal() {
+		if (!activeKeyId) return;
+		showModelModal = true;
+		modelError = null;
+
+		// Check session cache
+		if (modelCache.has(activeKeyId)) {
+			availableModels = modelCache.get(activeKeyId)!;
+			loadingModels = false;
+			return;
+		}
+
+		loadingModels = true;
+		availableModels = [];
+
+		try {
+			const res = await fetch(
+				`${config.apiBase}/models/available?keyId=${encodeURIComponent(activeKeyId)}`,
+			);
+			if (!res.ok) {
+				const data = await res.json().catch(() => ({}));
+				modelError = data.error ?? `Failed to fetch models (HTTP ${res.status})`;
+				return;
+			}
+			const data = await res.json();
+			availableModels = data.models ?? [];
+			// Cache for session
+			modelCache.set(activeKeyId, availableModels);
+		} catch (err) {
+			modelError = err instanceof Error ? err.message : "Failed to fetch models";
+		} finally {
+			loadingModels = false;
+		}
+	}
+
+	function selectModel(model: string) {
+		showModelModal = false;
+		if (activeKeyId) {
+			onModelChange(activeKeyId, model);
+		}
+	}
+</script>
+
+<div class="bg-base-200 rounded-lg p-3">
+	<div class="flex items-center justify-between">
+		<span class="text-sm font-medium">Key</span>
+		<button class="btn btn-sm btn-outline" onclick={() => (showKeyModal = true)}>
+			{activeKeyId ?? "Select Key"}
+		</button>
+	</div>
+
+	<div class="flex items-center justify-between mt-2">
+		<span class="text-sm font-medium">Model</span>
+		<button class="btn btn-sm btn-outline" onclick={openModelModal} disabled={!activeKeyId}>
+			{activeModelId ?? "Select Model"}
+		</button>
+	</div>
+
+	{#if activeModelId}
+		<div class="flex items-center justify-between mt-2">
+			<span class="text-sm font-medium">Thinking</span>
+			<select
+				class="select select-bordered select-sm"
+				value={reasoningEffort}
+				onchange={(e) => onReasoningChange(e.currentTarget.value)}
+			>
+				<option value="none">Off</option>
+				<option value="low">Low</option>
+				<option value="medium">Medium</option>
+				<option value="high">High</option>
+				<option value="max">Max</option>
+			</select>
+		</div>
+	{/if}
+</div>
+
+{#if showKeyModal}
+	<div class="modal modal-open" use:portal>
+		<div class="modal-box">
+			<h3 class="font-bold text-xl">Select Key</h3>
+			<div class="mt-4 flex flex-col gap-2">
+				{#each keys as key}
+					<button
+						class="btn {key.id === activeKeyId
+							? 'btn-primary'
+							: 'btn-ghost'} justify-start text-base"
+						onclick={() => selectKey(key.id)}
+					>
+						<span class="font-mono">{key.id}</span>
+						<span class="badge ml-auto">{key.provider}</span>
+						<span
+							class="badge {key.status === 'active'
+								? 'badge-success'
+								: 'badge-error'}">{key.status}</span
+						>
+					</button>
+				{/each}
+			</div>
+			<div class="modal-action">
+				<button class="btn" onclick={() => (showKeyModal = false)}>Cancel</button>
+			</div>
+		</div>
+		<button type="button" class="modal-backdrop" onclick={() => (showKeyModal = false)} aria-label="Close modal"></button>
+	</div>
+{/if}
+
+{#if showModelModal}
+	<div class="modal modal-open" use:portal>
+		<div class="modal-box">
+			<h3 class="font-bold text-xl">Select Model</h3>
+			{#if loadingModels}
+				<div class="flex justify-center py-8">
+					<span class="loading loading-spinner loading-lg"></span>
+				</div>
+			{:else if modelError}
+				<div class="alert alert-error mt-4 text-base">
+					<span>{modelError}</span>
+				</div>
+			{:else}
+				<div class="mt-4 flex flex-col gap-1 max-h-96 overflow-y-auto">
+					{#each availableModels as model}
+						<button
+							class="btn {model === activeModelId
+								? 'btn-primary'
+								: 'btn-ghost'} justify-start font-mono text-base"
+							onclick={() => selectModel(model)}
+						>
+							{model}
+						</button>
+					{/each}
+				</div>
+			{/if}
+			<div class="modal-action">
+				<button class="btn" onclick={() => (showModelModal = false)}>Cancel</button>
+			</div>
+		</div>
+		<button type="button" class="modal-backdrop" onclick={() => (showModelModal = false)} aria-label="Close modal"></button>
+	</div>
+{/if}
diff --git a/packages/frontend/src/lib/components/SidebarPanel.svelte b/packages/frontend/src/lib/components/SidebarPanel.svelte
new file mode 100644
index 0000000..fe92486
--- /dev/null
+++ b/packages/frontend/src/lib/components/SidebarPanel.svelte
@@ -0,0 +1,53 @@
+<script lang="ts">
+	import ModelStatus from "./ModelStatus.svelte";
+	import TaskListPanel from "./TaskListPanel.svelte";
+	import ConfigPanel from "./ConfigPanel.svelte";
+	import SkillsBrowser from "./SkillsBrowser.svelte";
+	import PermissionLog from "./PermissionLog.svelte";
+	import type { TaskItem, LogEntry, KeyInfo, ModelInfo } from "../types.js";
+
+	const {
+		models = [],
+		keys = [],
+		tags = [],
+		tasks = [],
+		permissionLog = [],
+		apiBase = "",
+	}: {
+		models?: ModelInfo[];
+		keys?: KeyInfo[];
+		tags?: string[];
+		tasks?: TaskItem[];
+		permissionLog?: LogEntry[];
+		apiBase?: string;
+	} = $props();
+
+	let selected = $state("Tasks");
+
+	const options = ["Model Status", "Tasks", "Config", "Skills", "Permission Log"];
+</script>
+
+<div class="bg-base-200 rounded-lg p-3">
+	<select
+		class="select select-bordered select-sm w-full"
+		bind:value={selected}
+	>
+		{#each options as option}
+			<option value={option}>{option}</option>
+		{/each}
+	</select>
+
+	<div class="mt-2">
+		{#if selected === "Model Status"}
+			<ModelStatus {models} {keys} {tags} />
+		{:else if selected === "Tasks"}
+			<TaskListPanel {tasks} />
+		{:else if selected === "Config"}
+			<ConfigPanel {apiBase} />
+		{:else if selected === "Skills"}
+			<SkillsBrowser {apiBase} />
+		{:else if selected === "Permission Log"}
+			<PermissionLog entries={permissionLog} />
+		{/if}
+	</div>
+</div>
diff --git a/packages/frontend/src/lib/components/ToolCallDisplay.svelte b/packages/frontend/src/lib/components/ToolCallDisplay.svelte
index d85372c..805de6d 100644
--- a/packages/frontend/src/lib/components/ToolCallDisplay.svelte
+++ b/packages/frontend/src/lib/components/ToolCallDisplay.svelte
@@ -3,7 +3,7 @@ import type { ToolCallDisplay } from "../types.js";
 
 const { toolCall }: { toolCall: ToolCallDisplay } = $props();
 
-let isExpanded = $state(toolCall.isExpanded);
+let isExpanded = $state(false);
 
 function toggle() {
 	isExpanded = !isExpanded;
diff --git a/packages/frontend/src/lib/types.ts b/packages/frontend/src/lib/types.ts
index fcf6f92..9c83eac 100644
--- a/packages/frontend/src/lib/types.ts
+++ b/packages/frontend/src/lib/types.ts
@@ -4,7 +4,6 @@ export interface ToolCallDisplay {
 	arguments: Record<string, unknown>;
 	result?: string;
 	isError?: boolean;
-	isExpanded: boolean;
 	shellOutput?: { stdout: string; stderr: string };
 }
 
@@ -26,7 +25,7 @@ export type ContentSegment =
 
 export interface ChatMessage {
 	id: string;
-	role: "user" | "assistant";
+	role: "user" | "assistant" | "system";
 	content: ContentSegment[];
 	thinking?: string;
 	isStreaming?: boolean;
@@ -82,6 +81,25 @@ export interface PermissionPrompt {
 	metadata: Record<string, unknown>;
 }
 
+export interface ModelOverride {
+	keyId: string;
+	modelId: string;
+}
+
+export interface KeyInfo {
+	id: string;
+	provider: string;
+	status: "active" | "exhausted";
+	lastError: string | null;
+	exhaustedAt: number | null;
+}
+
+export interface ModelInfo {
+	id: string;
+	provider: string;
+	tags: string[];
+}
+
 export interface LogEntry {
 	id: string;
 	permission: string;