Initial commit: EGBE chatbot template

Stripped from vercel/chatbot (Apache 2.0):
- Dropped @vercel/* packages and AI Gateway
- Removed artifacts feature (code/text/sheet/image side panel)
- Switched AI provider to @ai-sdk/openai-compatible -> EGBE LiteLLM
- Replaced Vercel Blob upload with data URLs
- Dropped Redis resumable streams and rate limiter (in-memory now)
- Added Dockerfile (Next.js standalone) + entrypoint that runs migrations
- Wired DATABASE_URL, EGBE_AI_API_URL/KEY, NEXT_PUBLIC_BASE_URL for app-deploy.sh

lib/ai/models.ts

@@ -0,0 +1,88 @@
+export const DEFAULT_CHAT_MODEL = "claude-sonnet";
+
+export type ModelCapabilities = {
+  tools: boolean;
+  vision: boolean;
+  reasoning: boolean;
+};
+
+export type ChatModel = {
+  id: string;
+  name: string;
+  provider: string;
+  description: string;
+};
+
+export const chatModels: ChatModel[] = [
+  {
+    id: "claude-sonnet",
+    name: "Claude Sonnet 4.6",
+    provider: "anthropic",
+    description: "Anthropic's flagship model — balanced reasoning and speed",
+  },
+  {
+    id: "claude-haiku",
+    name: "Claude Haiku 4.5",
+    provider: "anthropic",
+    description: "Fast and cheap Anthropic model",
+  },
+  {
+    id: "gpt-5.4",
+    name: "GPT-5.4",
+    provider: "openai",
+    description: "OpenAI's flagship",
+  },
+  {
+    id: "gpt-5.4-mini",
+    name: "GPT-5.4 Mini",
+    provider: "openai",
+    description: "Fast and cheap OpenAI model",
+  },
+  {
+    id: "kimi-k2.6",
+    name: "Kimi K2.6",
+    provider: "moonshotai",
+    description: "Moonshot AI flagship",
+  },
+  {
+    id: "minimax-m2.7",
+    name: "MiniMax M2.7",
+    provider: "minimax",
+    description: "MiniMax open-source model",
+  },
+  {
+    id: "qwen3-coder",
+    name: "Qwen3 Coder",
+    provider: "alibaba",
+    description: "Code-specialized model",
+  },
+];
+
+export const titleModel = chatModels.find((m) => m.id === "claude-haiku")!;
+
+export const allowedModelIds = new Set(chatModels.map((m) => m.id));
+
+export const modelsByProvider = chatModels.reduce(
+  (acc, model) => {
+    if (!acc[model.provider]) {
+      acc[model.provider] = [];
+    }
+    acc[model.provider].push(model);
+    return acc;
+  },
+  {} as Record<string, ChatModel[]>
+);
+
+export const modelCapabilities: Record<string, ModelCapabilities> = {
+  "claude-sonnet": { tools: true, vision: true, reasoning: true },
+  "claude-haiku": { tools: true, vision: true, reasoning: false },
+  "gpt-5.4": { tools: true, vision: true, reasoning: true },
+  "gpt-5.4-mini": { tools: true, vision: true, reasoning: false },
+  "kimi-k2.6": { tools: true, vision: false, reasoning: false },
+  "minimax-m2.7": { tools: true, vision: false, reasoning: false },
+  "qwen3-coder": { tools: true, vision: false, reasoning: false },
+};
+
+export function getActiveModels(): ChatModel[] {
+  return chatModels;
+}