chore: bump version to 0.4.7 (#416)

* chore: bump version to 0.4.7

* style: auto-format with Biome

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -0,0 +1,44 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Type check
+        run: npx tsc --noEmit
+
+      - name: Lint check
+        run: npm run check
+
+      - name: Build
+        run: npm run build
+
+      - name: Security audit
+        run: npm audit --audit-level=high --omit=dev

README.md

@@ -147,13 +147,14 @@ Download the native desktop app for your platform from the [Releases page](https
 | Linux | `.AppImage` or `.deb` (x64 & ARM64) |
 
 **Features:**
+- **Secure API key storage**: Credentials encrypted using OS keychain
+- **Configuration presets**: Save and switch between AI providers via menu
 - **Native file dialogs**: Open/save `.drawio` files directly
 - **Offline capable**: Works without internet after first launch
-- **Built-in settings**: Configure AI providers directly in the app
 
 **Quick Setup:**
 1. Download and install for your platform
-2. Click the settings icon in the chat panel
+2. Open the app → **Menu → Configuration → Manage Presets**
 3. Add your AI provider credentials
 4. Start creating diagrams!
 

app/[lang]/page.tsx

@@ -1,4 +1,5 @@
 "use client"
+import { usePathname, useRouter } from "next/navigation"
 import { useCallback, useEffect, useRef, useState } from "react"
 import { DrawIoEmbed } from "react-drawio"
 import type { ImperativePanelHandle } from "react-resizable-panels"
@@ -10,6 +11,7 @@ import {
     ResizablePanelGroup,
 } from "@/components/ui/resizable"
 import { useDiagram } from "@/contexts/diagram-context"
+import { i18n, type Locale } from "@/lib/i18n/config"
 
 const drawioBaseUrl =
     process.env.NEXT_PUBLIC_DRAWIO_BASE_URL || "https://embed.diagrams.net"
@@ -24,6 +26,8 @@ export default function Home() {
         showSaveDialog,
         setShowSaveDialog,
     } = useDiagram()
+    const router = useRouter()
+    const pathname = usePathname()
     const [isMobile, setIsMobile] = useState(false)
     const [isChatVisible, setIsChatVisible] = useState(true)
     const [drawioUi, setDrawioUi] = useState<"min" | "sketch">("min")
@@ -58,6 +62,18 @@ export default function Home() {
 
     // Load preferences from localStorage after mount
     useEffect(() => {
+        // Restore saved locale and redirect if needed
+        const savedLocale = localStorage.getItem("next-ai-draw-io-locale")
+        if (savedLocale && i18n.locales.includes(savedLocale as Locale)) {
+            const pathParts = pathname.split("/").filter(Boolean)
+            const currentLocale = pathParts[0]
+            if (currentLocale !== savedLocale) {
+                pathParts[0] = savedLocale
+                router.replace(`/${pathParts.join("/")}`)
+                return // Wait for redirect
+            }
+        }
+
         const savedUi = localStorage.getItem("drawio-theme")
         if (savedUi === "min" || savedUi === "sketch") {
             setDrawioUi(savedUi)
@@ -84,7 +100,7 @@ export default function Home() {
         }
 
         setIsLoaded(true)
-    }, [])
+    }, [pathname, router])
 
     const handleDarkModeChange = async () => {
         await saveDiagramToStorage()

components/model-config-dialog.tsx

@@ -412,11 +412,7 @@ export function ModelConfigDialog({
                                                 setSelectedProviderId(
                                                     provider.id,
                                                 )
-                                                setValidationStatus(
-                                                    provider.validated
-                                                        ? "success"
-                                                        : "idle",
-                                                )
+                                                setValidationStatus("idle")
                                                 setShowApiKey(false)
                                             }}
                                             className={cn(
@@ -555,6 +551,20 @@ export function ModelConfigDialog({
                                                     </span>
                                                 </div>
                                             )}
+                                            <Button
+                                                variant="ghost"
+                                                size="sm"
+                                                onClick={() =>
+                                                    setDeleteConfirmOpen(true)
+                                                }
+                                                className="text-destructive hover:text-destructive hover:bg-destructive/10"
+                                            >
+                                                <Trash2 className="h-4 w-4 mr-1.5" />
+                                                {
+                                                    dict.modelConfig
+                                                        .deleteProvider
+                                                }
+                                            </Button>
                                         </div>
 
                                         {/* Configuration Section */}
@@ -1416,24 +1426,6 @@ export function ModelConfigDialog({
                                                 )}
                                             </div>
                                         </ConfigSection>
-
-                                        {/* Danger Zone */}
-                                        <div className="pt-4">
-                                            <Button
-                                                variant="ghost"
-                                                size="sm"
-                                                onClick={() =>
-                                                    setDeleteConfirmOpen(true)
-                                                }
-                                                className="text-muted-foreground hover:text-destructive hover:bg-destructive/5 rounded-xl"
-                                            >
-                                                <Trash2 className="h-4 w-4 mr-2" />
-                                                {
-                                                    dict.modelConfig
-                                                        .deleteProvider
-                                                }
-                                            </Button>
-                                        </div>
                                     </div>
                                 </ScrollArea>
                             </>

components/settings-dialog.tsx

@@ -151,6 +151,9 @@ function SettingsContent({
     }, [open])
 
     const changeLanguage = (lang: string) => {
+        // Save locale to localStorage for persistence across restarts
+        localStorage.setItem("next-ai-draw-io-locale", lang)
+
         const parts = pathname.split("/")
         if (parts.length > 1 && i18n.locales.includes(parts[1] as Locale)) {
             parts[1] = lang

electron.d.ts

@@ -2,6 +2,29 @@
  * Type declarations for Electron API exposed via preload script
  */
 
+/** Configuration preset interface */
+interface ConfigPreset {
+    id: string
+    name: string
+    createdAt: number
+    updatedAt: number
+    config: {
+        AI_PROVIDER?: string
+        AI_MODEL?: string
+        AI_API_KEY?: string
+        AI_BASE_URL?: string
+        TEMPERATURE?: string
+        [key: string]: string | undefined
+    }
+}
+
+/** Result of applying a preset */
+interface ApplyPresetResult {
+    success: boolean
+    error?: string
+    env?: Record<string, string>
+}
+
 declare global {
     interface Window {
         /** Main window Electron API */
@@ -23,7 +46,29 @@ declare global {
             /** Save data to file via save dialog */
             saveFile: (data: string) => Promise<boolean>
         }
+
+        /** Settings window Electron API */
+        settingsAPI?: {
+            /** Get all configuration presets */
+            getPresets: () => Promise<ConfigPreset[]>
+            /** Get current preset ID */
+            getCurrentPresetId: () => Promise<string | null>
+            /** Get current preset */
+            getCurrentPreset: () => Promise<ConfigPreset | null>
+            /** Save (create or update) a preset */
+            savePreset: (preset: {
+                id?: string
+                name: string
+                config: Record<string, string | undefined>
+            }) => Promise<ConfigPreset>
+            /** Delete a preset */
+            deletePreset: (id: string) => Promise<boolean>
+            /** Apply a preset (sets environment variables and restarts server) */
+            applyPreset: (id: string) => Promise<ApplyPresetResult>
+            /** Close settings window */
+            close: () => void
+        }
     }
 }
 
-export {}
+export { ConfigPreset, ApplyPresetResult }

electron/main/app-menu.ts

@@ -1,4 +1,19 @@
-import { app, Menu, type MenuItemConstructorOptions, shell } from "electron"
+import {
+    app,
+    BrowserWindow,
+    dialog,
+    Menu,
+    type MenuItemConstructorOptions,
+    shell,
+} from "electron"
+import {
+    applyPresetToEnv,
+    getAllPresets,
+    getCurrentPresetId,
+    setCurrentPreset,
+} from "./config-manager"
+import { restartNextServer } from "./next-server"
+import { showSettingsWindow } from "./settings-window"
 
 /**
  * Build and set the application menu
@@ -9,6 +24,13 @@ export function buildAppMenu(): void {
     Menu.setApplicationMenu(menu)
 }
 
+/**
+ * Rebuild the menu (call this when presets change)
+ */
+export function rebuildAppMenu(): void {
+    buildAppMenu()
+}
+
 /**
  * Get the menu template
  */
@@ -24,6 +46,15 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
             submenu: [
                 { role: "about" },
                 { type: "separator" },
+                {
+                    label: "Settings...",
+                    accelerator: "CmdOrCtrl+,",
+                    click: () => {
+                        const win = BrowserWindow.getFocusedWindow()
+                        showSettingsWindow(win || undefined)
+                    },
+                },
+                { type: "separator" },
                 { role: "services" },
                 { type: "separator" },
                 { role: "hide" },
@@ -38,7 +69,22 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
     // File menu
     template.push({
         label: "File",
-        submenu: [isMac ? { role: "close" } : { role: "quit" }],
+        submenu: [
+            ...(isMac
+                ? []
+                : [
+                      {
+                          label: "Settings",
+                          accelerator: "CmdOrCtrl+,",
+                          click: () => {
+                              const win = BrowserWindow.getFocusedWindow()
+                              showSettingsWindow(win || undefined)
+                          },
+                      },
+                      { type: "separator" } as MenuItemConstructorOptions,
+                  ]),
+            isMac ? { role: "close" } : { role: "quit" },
+        ],
     })
 
     // Edit menu
@@ -83,6 +129,9 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
         ],
     })
 
+    // Configuration menu with presets
+    template.push(buildConfigMenu())
+
     // Window menu
     template.push({
         label: "Window",
@@ -123,3 +172,70 @@ function getMenuTemplate(): MenuItemConstructorOptions[] {
 
     return template
 }
+
+/**
+ * Build the Configuration menu with presets
+ */
+function buildConfigMenu(): MenuItemConstructorOptions {
+    const presets = getAllPresets()
+    const currentPresetId = getCurrentPresetId()
+
+    const presetItems: MenuItemConstructorOptions[] = presets.map((preset) => ({
+        label: preset.name,
+        type: "radio",
+        checked: preset.id === currentPresetId,
+        click: async () => {
+            const previousPresetId = getCurrentPresetId()
+            const env = applyPresetToEnv(preset.id)
+
+            if (env) {
+                try {
+                    await restartNextServer()
+                    rebuildAppMenu() // Rebuild menu to update checkmarks
+                } catch (error) {
+                    console.error("Failed to restart server:", error)
+
+                    // Revert to previous preset on failure
+                    if (previousPresetId) {
+                        applyPresetToEnv(previousPresetId)
+                    } else {
+                        setCurrentPreset(null)
+                    }
+
+                    // Rebuild menu to restore previous checkmark state
+                    rebuildAppMenu()
+
+                    // Show error dialog to notify user
+                    dialog.showErrorBox(
+                        "Configuration Error",
+                        `Failed to apply preset "${preset.name}". The server could not be restarted.\n\nThe previous configuration has been restored.\n\nError: ${error instanceof Error ? error.message : String(error)}`,
+                    )
+                }
+            }
+        },
+    }))
+
+    return {
+        label: "Configuration",
+        submenu: [
+            ...(presetItems.length > 0
+                ? [
+                      { label: "Switch Preset", enabled: false },
+                      { type: "separator" } as MenuItemConstructorOptions,
+                      ...presetItems,
+                      { type: "separator" } as MenuItemConstructorOptions,
+                  ]
+                : []),
+            {
+                label:
+                    presetItems.length > 0
+                        ? "Manage Presets..."
+                        : "Add Configuration Preset...",
+                click: () => {
+                    const win = BrowserWindow.getFocusedWindow()
+                    showSettingsWindow(win || undefined)
+                },
+            },
+        ],
+    }
+}

electron/main/config-manager.ts

@@ -0,0 +1,460 @@
+import { randomUUID } from "node:crypto"
+import { existsSync, mkdirSync, readFileSync, writeFileSync } from "node:fs"
+import path from "node:path"
+import { app, safeStorage } from "electron"
+
+/**
+ * Fields that contain sensitive data and should be encrypted
+ */
+const SENSITIVE_FIELDS = ["AI_API_KEY"] as const
+
+/**
+ * Prefix to identify encrypted values
+ */
+const ENCRYPTED_PREFIX = "encrypted:"
+
+/**
+ * Check if safeStorage encryption is available
+ */
+function isEncryptionAvailable(): boolean {
+    return safeStorage.isEncryptionAvailable()
+}
+
+/**
+ * Track if we've already warned about plaintext storage
+ */
+let hasWarnedAboutPlaintext = false
+
+/**
+ * Encrypt a sensitive value using safeStorage
+ * Warns if encryption is not available (API key stored in plaintext)
+ */
+function encryptValue(value: string): string {
+    if (!value) {
+        return value
+    }
+
+    if (!isEncryptionAvailable()) {
+        if (!hasWarnedAboutPlaintext) {
+            console.warn(
+                "⚠️ SECURITY WARNING: safeStorage not available. " +
+                    "API keys will be stored in PLAINTEXT. " +
+                    "On Linux, install gnome-keyring or similar for secure storage.",
+            )
+            hasWarnedAboutPlaintext = true
+        }
+        return value
+    }
+
+    try {
+        const encrypted = safeStorage.encryptString(value)
+        return ENCRYPTED_PREFIX + encrypted.toString("base64")
+    } catch (error) {
+        console.error("Encryption failed:", error)
+        // Fail secure: don't store if encryption fails
+        throw new Error(
+            "Failed to encrypt API key. Cannot securely store credentials.",
+        )
+    }
+}
+
+/**
+ * Decrypt a sensitive value using safeStorage
+ * Returns the original value if it's not encrypted or decryption fails
+ */
+function decryptValue(value: string): string {
+    if (!value || !value.startsWith(ENCRYPTED_PREFIX)) {
+        return value
+    }
+    if (!isEncryptionAvailable()) {
+        console.warn(
+            "Cannot decrypt value: safeStorage encryption is not available",
+        )
+        return value
+    }
+    try {
+        const base64Data = value.slice(ENCRYPTED_PREFIX.length)
+        const buffer = Buffer.from(base64Data, "base64")
+        return safeStorage.decryptString(buffer)
+    } catch (error) {
+        console.error("Failed to decrypt value:", error)
+        return value
+    }
+}
+
+/**
+ * Encrypt sensitive fields in a config object
+ */
+function encryptConfig(
+    config: Record<string, string | undefined>,
+): Record<string, string | undefined> {
+    const encrypted = { ...config }
+    for (const field of SENSITIVE_FIELDS) {
+        if (encrypted[field]) {
+            encrypted[field] = encryptValue(encrypted[field] as string)
+        }
+    }
+    return encrypted
+}
+
+/**
+ * Decrypt sensitive fields in a config object
+ */
+function decryptConfig(
+    config: Record<string, string | undefined>,
+): Record<string, string | undefined> {
+    const decrypted = { ...config }
+    for (const field of SENSITIVE_FIELDS) {
+        if (decrypted[field]) {
+            decrypted[field] = decryptValue(decrypted[field] as string)
+        }
+    }
+    return decrypted
+}
+
+/**
+ * Configuration preset interface
+ */
+export interface ConfigPreset {
+    id: string
+    name: string
+    createdAt: number
+    updatedAt: number
+    config: {
+        AI_PROVIDER?: string
+        AI_MODEL?: string
+        AI_API_KEY?: string
+        AI_BASE_URL?: string
+        TEMPERATURE?: string
+        [key: string]: string | undefined
+    }
+}
+
+/**
+ * Configuration file structure
+ */
+interface ConfigPresetsFile {
+    version: 1
+    currentPresetId: string | null
+    presets: ConfigPreset[]
+}
+
+const CONFIG_FILE_NAME = "config-presets.json"
+
+/**
+ * Get the path to the config file
+ */
+function getConfigFilePath(): string {
+    const userDataPath = app.getPath("userData")
+    return path.join(userDataPath, CONFIG_FILE_NAME)
+}
+
+/**
+ * Load presets from the config file
+ * Decrypts sensitive fields automatically
+ */
+export function loadPresets(): ConfigPresetsFile {
+    const configPath = getConfigFilePath()
+
+    if (!existsSync(configPath)) {
+        return {
+            version: 1,
+            currentPresetId: null,
+            presets: [],
+        }
+    }
+
+    try {
+        const content = readFileSync(configPath, "utf-8")
+        const data = JSON.parse(content) as ConfigPresetsFile
+
+        // Decrypt sensitive fields in each preset
+        data.presets = data.presets.map((preset) => ({
+            ...preset,
+            config: decryptConfig(preset.config) as ConfigPreset["config"],
+        }))
+
+        return data
+    } catch (error) {
+        console.error("Failed to load config presets:", error)
+        return {
+            version: 1,
+            currentPresetId: null,
+            presets: [],
+        }
+    }
+}
+
+/**
+ * Save presets to the config file
+ * Encrypts sensitive fields automatically
+ */
+export function savePresets(data: ConfigPresetsFile): void {
+    const configPath = getConfigFilePath()
+    const userDataPath = app.getPath("userData")
+
+    // Ensure the directory exists
+    if (!existsSync(userDataPath)) {
+        mkdirSync(userDataPath, { recursive: true })
+    }
+
+    // Encrypt sensitive fields before saving
+    const dataToSave: ConfigPresetsFile = {
+        ...data,
+        presets: data.presets.map((preset) => ({
+            ...preset,
+            config: encryptConfig(preset.config) as ConfigPreset["config"],
+        })),
+    }
+
+    try {
+        writeFileSync(configPath, JSON.stringify(dataToSave, null, 2), "utf-8")
+    } catch (error) {
+        console.error("Failed to save config presets:", error)
+        throw error
+    }
+}
+
+/**
+ * Get all presets
+ */
+export function getAllPresets(): ConfigPreset[] {
+    const data = loadPresets()
+    return data.presets
+}
+
+/**
+ * Get current preset ID
+ */
+export function getCurrentPresetId(): string | null {
+    const data = loadPresets()
+    return data.currentPresetId
+}
+
+/**
+ * Get current preset
+ */
+export function getCurrentPreset(): ConfigPreset | null {
+    const data = loadPresets()
+    if (!data.currentPresetId) {
+        return null
+    }
+    return data.presets.find((p) => p.id === data.currentPresetId) || null
+}
+
+/**
+ * Create a new preset
+ */
+export function createPreset(
+    preset: Omit<ConfigPreset, "id" | "createdAt" | "updatedAt">,
+): ConfigPreset {
+    const data = loadPresets()
+    const now = Date.now()
+
+    const newPreset: ConfigPreset = {
+        id: randomUUID(),
+        name: preset.name,
+        config: preset.config,
+        createdAt: now,
+        updatedAt: now,
+    }
+
+    data.presets.push(newPreset)
+    savePresets(data)
+
+    return newPreset
+}
+
+/**
+ * Update an existing preset
+ */
+export function updatePreset(
+    id: string,
+    updates: Partial<Omit<ConfigPreset, "id" | "createdAt">>,
+): ConfigPreset | null {
+    const data = loadPresets()
+    const index = data.presets.findIndex((p) => p.id === id)
+
+    if (index === -1) {
+        return null
+    }
+
+    const updatedPreset: ConfigPreset = {
+        ...data.presets[index],
+        ...updates,
+        updatedAt: Date.now(),
+    }
+
+    data.presets[index] = updatedPreset
+    savePresets(data)
+
+    return updatedPreset
+}
+
+/**
+ * Delete a preset
+ */
+export function deletePreset(id: string): boolean {
+    const data = loadPresets()
+    const index = data.presets.findIndex((p) => p.id === id)
+
+    if (index === -1) {
+        return false
+    }
+
+    data.presets.splice(index, 1)
+
+    // Clear current preset if it was deleted
+    if (data.currentPresetId === id) {
+        data.currentPresetId = null
+    }
+
+    savePresets(data)
+    return true
+}
+
+/**
+ * Set the current preset
+ */
+export function setCurrentPreset(id: string | null): boolean {
+    const data = loadPresets()
+
+    if (id !== null) {
+        const preset = data.presets.find((p) => p.id === id)
+        if (!preset) {
+            return false
+        }
+    }
+
+    data.currentPresetId = id
+    savePresets(data)
+    return true
+}
+
+/**
+ * Map generic AI_API_KEY and AI_BASE_URL to provider-specific environment variables
+ */
+const PROVIDER_ENV_MAP: Record<string, { apiKey: string; baseUrl: string }> = {
+    openai: { apiKey: "OPENAI_API_KEY", baseUrl: "OPENAI_BASE_URL" },
+    anthropic: { apiKey: "ANTHROPIC_API_KEY", baseUrl: "ANTHROPIC_BASE_URL" },
+    google: {
+        apiKey: "GOOGLE_GENERATIVE_AI_API_KEY",
+        baseUrl: "GOOGLE_BASE_URL",
+    },
+    azure: { apiKey: "AZURE_API_KEY", baseUrl: "AZURE_BASE_URL" },
+    openrouter: {
+        apiKey: "OPENROUTER_API_KEY",
+        baseUrl: "OPENROUTER_BASE_URL",
+    },
+    deepseek: { apiKey: "DEEPSEEK_API_KEY", baseUrl: "DEEPSEEK_BASE_URL" },
+    siliconflow: {
+        apiKey: "SILICONFLOW_API_KEY",
+        baseUrl: "SILICONFLOW_BASE_URL",
+    },
+    gateway: { apiKey: "AI_GATEWAY_API_KEY", baseUrl: "AI_GATEWAY_BASE_URL" },
+    // bedrock and ollama don't use API keys in the same way
+    bedrock: { apiKey: "", baseUrl: "" },
+    ollama: { apiKey: "", baseUrl: "OLLAMA_BASE_URL" },
+}
+
+/**
+ * Apply preset environment variables to the current process
+ * Returns the environment variables that were applied
+ */
+export function applyPresetToEnv(id: string): Record<string, string> | null {
+    const data = loadPresets()
+    const preset = data.presets.find((p) => p.id === id)
+
+    if (!preset) {
+        return null
+    }
+
+    const appliedEnv: Record<string, string> = {}
+    const provider = preset.config.AI_PROVIDER?.toLowerCase()
+
+    for (const [key, value] of Object.entries(preset.config)) {
+        if (value !== undefined && value !== "") {
+            // Map generic AI_API_KEY to provider-specific key
+            if (
+                key === "AI_API_KEY" &&
+                provider &&
+                PROVIDER_ENV_MAP[provider]
+            ) {
+                const providerApiKey = PROVIDER_ENV_MAP[provider].apiKey
+                if (providerApiKey) {
+                    process.env[providerApiKey] = value
+                    appliedEnv[providerApiKey] = value
+                }
+            }
+            // Map generic AI_BASE_URL to provider-specific key
+            else if (
+                key === "AI_BASE_URL" &&
+                provider &&
+                PROVIDER_ENV_MAP[provider]
+            ) {
+                const providerBaseUrl = PROVIDER_ENV_MAP[provider].baseUrl
+                if (providerBaseUrl) {
+                    process.env[providerBaseUrl] = value
+                    appliedEnv[providerBaseUrl] = value
+                }
+            }
+            // Apply other env vars directly
+            else {
+                process.env[key] = value
+                appliedEnv[key] = value
+            }
+        }
+    }
+
+    // Set as current preset
+    data.currentPresetId = id
+    savePresets(data)
+
+    return appliedEnv
+}
+
+/**
+ * Get environment variables from current preset
+ * Maps generic AI_API_KEY/AI_BASE_URL to provider-specific keys
+ */
+export function getCurrentPresetEnv(): Record<string, string> {
+    const preset = getCurrentPreset()
+    if (!preset) {
+        return {}
+    }
+
+    const env: Record<string, string> = {}
+    const provider = preset.config.AI_PROVIDER?.toLowerCase()
+
+    for (const [key, value] of Object.entries(preset.config)) {
+        if (value !== undefined && value !== "") {
+            // Map generic AI_API_KEY to provider-specific key
+            if (
+                key === "AI_API_KEY" &&
+                provider &&
+                PROVIDER_ENV_MAP[provider]
+            ) {
+                const providerApiKey = PROVIDER_ENV_MAP[provider].apiKey
+                if (providerApiKey) {
+                    env[providerApiKey] = value
+                }
+            }
+            // Map generic AI_BASE_URL to provider-specific key
+            else if (
+                key === "AI_BASE_URL" &&
+                provider &&
+                PROVIDER_ENV_MAP[provider]
+            ) {
+                const providerBaseUrl = PROVIDER_ENV_MAP[provider].baseUrl
+                if (providerBaseUrl) {
+                    env[providerBaseUrl] = value
+                }
+            }
+            // Apply other env vars directly
+            else {
+                env[key] = value
+            }
+        }
+    }
+    return env
+}

electron/main/index.ts

@@ -1,8 +1,10 @@
 import { app, BrowserWindow, dialog, shell } from "electron"
 import { buildAppMenu } from "./app-menu"
+import { getCurrentPresetEnv } from "./config-manager"
 import { loadEnvFile } from "./env-loader"
 import { registerIpcHandlers } from "./ipc-handlers"
 import { startNextServer, stopNextServer } from "./next-server"
+import { registerSettingsWindowHandlers } from "./settings-window"
 import { createWindow, getMainWindow } from "./window-manager"
 
 // Single instance lock
@@ -22,12 +24,19 @@ if (!gotTheLock) {
     // Load environment variables from .env files
     loadEnvFile()
 
+    // Apply saved preset environment variables (overrides .env)
+    const presetEnv = getCurrentPresetEnv()
+    for (const [key, value] of Object.entries(presetEnv)) {
+        process.env[key] = value
+    }
+
     const isDev = process.env.NODE_ENV === "development"
     let serverUrl: string | null = null
 
     app.whenReady().then(async () => {
         // Register IPC handlers
         registerIpcHandlers()
+        registerSettingsWindowHandlers()
 
         // Build application menu
         buildAppMenu()

electron/main/ipc-handlers.ts

@@ -1,4 +1,43 @@
 import { app, BrowserWindow, dialog, ipcMain } from "electron"
+import {
+    applyPresetToEnv,
+    type ConfigPreset,
+    createPreset,
+    deletePreset,
+    getAllPresets,
+    getCurrentPreset,
+    getCurrentPresetId,
+    setCurrentPreset,
+    updatePreset,
+} from "./config-manager"
+import { restartNextServer } from "./next-server"
+
+/**
+ * Allowed configuration keys for presets
+ * This whitelist prevents arbitrary environment variable injection
+ */
+const ALLOWED_CONFIG_KEYS = new Set([
+    "AI_PROVIDER",
+    "AI_MODEL",
+    "AI_API_KEY",
+    "AI_BASE_URL",
+    "TEMPERATURE",
+])
+
+/**
+ * Sanitize preset config to only include allowed keys
+ */
+function sanitizePresetConfig(
+    config: Record<string, string | undefined>,
+): Record<string, string | undefined> {
+    const sanitized: Record<string, string | undefined> = {}
+    for (const key of ALLOWED_CONFIG_KEYS) {
+        if (key in config && typeof config[key] === "string") {
+            sanitized[key] = config[key]
+        }
+    }
+    return sanitized
+}
 
 /**
  * Register all IPC handlers
@@ -84,4 +123,90 @@ export function registerIpcHandlers(): void {
             return false
         }
     })
+
+    // ==================== Config Presets ====================
+
+    ipcMain.handle("config-presets:get-all", () => {
+        return getAllPresets()
+    })
+
+    ipcMain.handle("config-presets:get-current", () => {
+        return getCurrentPreset()
+    })
+
+    ipcMain.handle("config-presets:get-current-id", () => {
+        return getCurrentPresetId()
+    })
+
+    ipcMain.handle(
+        "config-presets:save",
+        (
+            _event,
+            preset: Omit<ConfigPreset, "id" | "createdAt" | "updatedAt"> & {
+                id?: string
+            },
+        ) => {
+            // Validate preset name
+            if (typeof preset.name !== "string" || !preset.name.trim()) {
+                throw new Error("Invalid preset name")
+            }
+
+            // Sanitize config to only allow whitelisted keys
+            const sanitizedConfig = sanitizePresetConfig(preset.config ?? {})
+
+            if (preset.id) {
+                // Update existing preset
+                return updatePreset(preset.id, {
+                    name: preset.name.trim(),
+                    config: sanitizedConfig,
+                })
+            }
+            // Create new preset
+            return createPreset({
+                name: preset.name.trim(),
+                config: sanitizedConfig,
+            })
+        },
+    )
+
+    ipcMain.handle("config-presets:delete", (_event, id: string) => {
+        return deletePreset(id)
+    })
+
+    ipcMain.handle("config-presets:apply", async (_event, id: string) => {
+        const env = applyPresetToEnv(id)
+        if (!env) {
+            return { success: false, error: "Preset not found" }
+        }
+
+        const isDev = process.env.NODE_ENV === "development"
+
+        if (isDev) {
+            // In development mode, the config file change will trigger
+            // the file watcher in electron-dev.mjs to restart Next.js
+            // We just need to save the preset (already done in applyPresetToEnv)
+            return { success: true, env, devMode: true }
+        }
+
+        // Production mode: restart the Next.js server to apply new environment variables
+        try {
+            await restartNextServer()
+            return { success: true, env }
+        } catch (error) {
+            return {
+                success: false,
+                error:
+                    error instanceof Error
+                        ? error.message
+                        : "Failed to restart server",
+            }
+        }
+    })
+
+    ipcMain.handle(
+        "config-presets:set-current",
+        (_event, id: string | null) => {
+            return setCurrentPreset(id)
+        },
+    )
 }

electron/main/port-manager.ts

@@ -3,16 +3,16 @@ import { app } from "electron"
 
 /**
  * Port configuration
+ * Using fixed ports to preserve localStorage across restarts
+ * (localStorage is origin-specific, so changing ports loses all saved data)
  */
 const PORT_CONFIG = {
     // Development mode uses fixed port for hot reload compatibility
     development: 6002,
-    // Production mode port range (will find first available)
-    production: {
-        min: 10000,
-        max: 65535,
-    },
-    // Maximum attempts to find an available port
+    // Production mode uses fixed port (61337) to preserve localStorage
+    // Falls back to sequential ports if unavailable
+    production: 61337,
+    // Maximum attempts to find an available port (fallback)
     maxAttempts: 100,
 }
 
@@ -36,19 +36,11 @@ export function isPortAvailable(port: number): Promise<boolean> {
     })
 }
 
-/**
- * Generate a random port within the production range
- */
-function getRandomPort(): number {
-    const { min, max } = PORT_CONFIG.production
-    return Math.floor(Math.random() * (max - min + 1)) + min
-}
-
 /**
  * Find an available port
  * - In development: uses fixed port (6002)
- * - In production: finds a random available port
- * - If a port was previously allocated, verifies it's still available
+ * - In production: uses fixed port (61337) to preserve localStorage
+ * - Falls back to sequential ports if preferred port is unavailable
  *
  * @param reuseExisting If true, try to reuse the previously allocated port
  * @returns Promise<number> The available port
@@ -56,6 +48,9 @@ function getRandomPort(): number {
  */
 export async function findAvailablePort(reuseExisting = true): Promise<number> {
     const isDev = !app.isPackaged
+    const preferredPort = isDev
+        ? PORT_CONFIG.development
+        : PORT_CONFIG.production
 
     // Try to reuse cached port if requested and available
     if (reuseExisting && allocatedPort !== null) {
@@ -69,29 +64,22 @@ export async function findAvailablePort(reuseExisting = true): Promise<number> {
         allocatedPort = null
     }
 
-    if (isDev) {
-        // Development mode: use fixed port
-        const port = PORT_CONFIG.development
-        const available = await isPortAvailable(port)
-        if (available) {
-            allocatedPort = port
-            return port
-        }
-        console.warn(
-            `Development port ${port} is in use, finding alternative...`,
-        )
+    // Try preferred port first
+    if (await isPortAvailable(preferredPort)) {
+        allocatedPort = preferredPort
+        return preferredPort
     }
 
-    // Production mode or dev port unavailable: find random available port
-    for (let attempt = 0; attempt < PORT_CONFIG.maxAttempts; attempt++) {
-        const port = isDev
-            ? PORT_CONFIG.development + attempt + 1
-            : getRandomPort()
+    console.warn(
+        `Preferred port ${preferredPort} is in use, finding alternative...`,
+    )
 
-        const available = await isPortAvailable(port)
-        if (available) {
+    // Fallback: try sequential ports starting from preferred + 1
+    for (let attempt = 1; attempt <= PORT_CONFIG.maxAttempts; attempt++) {
+        const port = preferredPort + attempt
+        if (await isPortAvailable(port)) {
             allocatedPort = port
-            console.log(`Allocated port: ${port}`)
+            console.log(`Allocated fallback port: ${port}`)
             return port
         }
     }

electron/main/settings-window.ts

@@ -0,0 +1,78 @@
+import path from "node:path"
+import { app, BrowserWindow, ipcMain } from "electron"
+
+let settingsWindow: BrowserWindow | null = null
+
+/**
+ * Create and show the settings window
+ */
+export function showSettingsWindow(parentWindow?: BrowserWindow): void {
+    // If settings window already exists, focus it
+    if (settingsWindow && !settingsWindow.isDestroyed()) {
+        settingsWindow.focus()
+        return
+    }
+
+    // Determine path to settings preload script
+    // In compiled output: dist-electron/preload/settings.js
+    const preloadPath = path.join(__dirname, "..", "preload", "settings.js")
+
+    // Determine path to settings HTML
+    // In packaged app: app.asar/dist-electron/settings/index.html
+    // In development: electron/settings/index.html
+    const settingsHtmlPath = app.isPackaged
+        ? path.join(__dirname, "..", "settings", "index.html")
+        : path.join(__dirname, "..", "..", "electron", "settings", "index.html")
+
+    settingsWindow = new BrowserWindow({
+        width: 600,
+        height: 700,
+        minWidth: 500,
+        minHeight: 500,
+        parent: parentWindow,
+        modal: false,
+        show: false,
+        title: "Settings - Next AI Draw.io",
+        webPreferences: {
+            preload: preloadPath,
+            contextIsolation: true,
+            nodeIntegration: false,
+            sandbox: true,
+        },
+    })
+    settingsWindow.loadFile(settingsHtmlPath)
+
+    settingsWindow.once("ready-to-show", () => {
+        settingsWindow?.show()
+    })
+
+    settingsWindow.on("closed", () => {
+        settingsWindow = null
+    })
+}
+
+/**
+ * Close the settings window if it exists
+ */
+export function closeSettingsWindow(): void {
+    if (settingsWindow && !settingsWindow.isDestroyed()) {
+        settingsWindow.close()
+        settingsWindow = null
+    }
+}
+
+/**
+ * Check if settings window is open
+ */
+export function isSettingsWindowOpen(): boolean {
+    return settingsWindow !== null && !settingsWindow.isDestroyed()
+}
+
+/**
+ * Register settings window IPC handlers
+ */
+export function registerSettingsWindowHandlers(): void {
+    ipcMain.on("settings:close", () => {
+        closeSettingsWindow()
+    })
+}

electron/preload/settings.ts

@@ -0,0 +1,35 @@
+/**
+ * Preload script for settings window
+ * Exposes APIs for managing configuration presets
+ */
+import { contextBridge, ipcRenderer } from "electron"
+
+// Expose settings API to the renderer process
+contextBridge.exposeInMainWorld("settingsAPI", {
+    // Get all presets
+    getPresets: () => ipcRenderer.invoke("config-presets:get-all"),
+
+    // Get current preset ID
+    getCurrentPresetId: () =>
+        ipcRenderer.invoke("config-presets:get-current-id"),
+
+    // Get current preset
+    getCurrentPreset: () => ipcRenderer.invoke("config-presets:get-current"),
+
+    // Save (create or update) a preset
+    savePreset: (preset: {
+        id?: string
+        name: string
+        config: Record<string, string | undefined>
+    }) => ipcRenderer.invoke("config-presets:save", preset),
+
+    // Delete a preset
+    deletePreset: (id: string) =>
+        ipcRenderer.invoke("config-presets:delete", id),
+
+    // Apply a preset (sets environment variables and restarts server)
+    applyPreset: (id: string) => ipcRenderer.invoke("config-presets:apply", id),
+
+    // Close settings window
+    close: () => ipcRenderer.send("settings:close"),
+})

electron/settings/index.html

@@ -0,0 +1,116 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'; style-src 'self';">
+    <title>Settings - Next AI Draw.io</title>
+    <link rel="stylesheet" href="./settings.css">
+</head>
+<body>
+    <div class="container">
+        <div class="deprecation-notice">
+            <strong>⚠️ Deprecation Notice</strong>
+            <p>This settings panel will be removed in a future update.</p>
+            <p>Please use the <strong>AI Model Configuration</strong> button (left of the Send button in the chat panel) to configure your AI providers. Your settings there will persist across updates.</p>
+        </div>
+
+        <h1>Configuration Presets</h1>
+
+        <div class="section">
+            <h2>Presets</h2>
+            <div id="preset-list" class="preset-list">
+                <!-- Presets will be loaded here -->
+            </div>
+            <button id="add-preset-btn" class="btn btn-primary">
+                + Add New Preset
+            </button>
+        </div>
+    </div>
+
+    <!-- Add/Edit Preset Modal -->
+    <div id="preset-modal" class="modal-overlay">
+        <div class="modal">
+            <div class="modal-header">
+                <h3 id="modal-title">Add Preset</h3>
+            </div>
+            <div class="modal-body">
+                <form id="preset-form">
+                    <input type="hidden" id="preset-id">
+
+                    <div class="form-group">
+                        <label for="preset-name">Preset Name *</label>
+                        <input type="text" id="preset-name" required placeholder="e.g., Work, Personal, Testing">
+                    </div>
+
+                    <div class="form-group">
+                        <label for="ai-provider">AI Provider</label>
+                        <select id="ai-provider">
+                            <option value="">-- Select Provider --</option>
+                            <option value="openai">OpenAI</option>
+                            <option value="anthropic">Anthropic (Claude)</option>
+                            <option value="google">Google AI (Gemini)</option>
+                            <option value="azure">Azure OpenAI</option>
+                            <option value="bedrock">AWS Bedrock</option>
+                            <option value="openrouter">OpenRouter</option>
+                            <option value="deepseek">DeepSeek</option>
+                            <option value="siliconflow">SiliconFlow</option>
+                            <option value="ollama">Ollama (Local)</option>
+                        </select>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="ai-model">Model ID</label>
+                        <input type="text" id="ai-model" placeholder="e.g., gpt-4o, claude-sonnet-4-5">
+                        <div class="hint">The model identifier to use with the selected provider</div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="ai-api-key">API Key</label>
+                        <input type="password" id="ai-api-key" placeholder="Your API key">
+                        <div class="hint">This will be stored locally on your device</div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="ai-base-url">Base URL (Optional)</label>
+                        <input type="text" id="ai-base-url" placeholder="https://api.example.com/v1">
+                        <div class="hint">Custom API endpoint URL</div>
+                    </div>
+
+                    <div class="form-group">
+                        <label for="temperature">Temperature (Optional)</label>
+                        <input type="text" id="temperature" placeholder="0.7">
+                        <div class="hint">Controls randomness (0.0 - 2.0)</div>
+                    </div>
+                </form>
+            </div>
+            <div class="modal-footer">
+                <button type="button" id="cancel-btn" class="btn btn-secondary">Cancel</button>
+                <button type="button" id="save-btn" class="btn btn-primary">Save</button>
+            </div>
+        </div>
+    </div>
+
+    <!-- Delete Confirmation Modal -->
+    <div id="delete-modal" class="modal-overlay">
+        <div class="modal">
+            <div class="modal-header">
+                <h3>Delete Preset</h3>
+            </div>
+            <div class="modal-body">
+                <p>Are you sure you want to delete "<span id="delete-preset-name"></span>"?</p>
+                <p class="delete-warning">This action cannot be undone.</p>
+            </div>
+            <div class="modal-footer">
+                <button type="button" id="delete-cancel-btn" class="btn btn-secondary">Cancel</button>
+                <button type="button" id="delete-confirm-btn" class="btn btn-danger">Delete</button>
+            </div>
+        </div>
+    </div>
+
+    <!-- Toast notification -->
+    <div id="toast" class="toast"></div>
+
+    <script src="./settings.js"></script>
+</body>
+</html>

electron/settings/settings.css

@@ -0,0 +1,344 @@
+:root {
+    --bg-primary: #ffffff;
+    --bg-secondary: #f5f5f5;
+    --bg-hover: #e8e8e8;
+    --text-primary: #1a1a1a;
+    --text-secondary: #666666;
+    --border-color: #e0e0e0;
+    --accent-color: #0066cc;
+    --accent-hover: #0052a3;
+    --danger-color: #dc3545;
+    --success-color: #28a745;
+}
+
+@media (prefers-color-scheme: dark) {
+    :root {
+        --bg-primary: #1a1a1a;
+        --bg-secondary: #2d2d2d;
+        --bg-hover: #3d3d3d;
+        --text-primary: #ffffff;
+        --text-secondary: #a0a0a0;
+        --border-color: #404040;
+        --accent-color: #4da6ff;
+        --accent-hover: #66b3ff;
+    }
+}
+
+.deprecation-notice {
+    background-color: #fff3cd;
+    border: 1px solid #ffc107;
+    border-radius: 8px;
+    padding: 16px;
+    margin-bottom: 20px;
+}
+
+.deprecation-notice strong {
+    color: #856404;
+    display: block;
+    margin-bottom: 8px;
+    font-size: 14px;
+}
+
+.deprecation-notice p {
+    color: #856404;
+    font-size: 13px;
+    margin: 4px 0;
+}
+
+@media (prefers-color-scheme: dark) {
+    .deprecation-notice {
+        background-color: #332701;
+        border-color: #665200;
+    }
+
+    .deprecation-notice strong,
+    .deprecation-notice p {
+        color: #ffc107;
+    }
+}
+
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+body {
+    font-family:
+        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
+        sans-serif;
+    background-color: var(--bg-primary);
+    color: var(--text-primary);
+    line-height: 1.5;
+}
+
+.container {
+    max-width: 560px;
+    margin: 0 auto;
+    padding: 24px;
+}
+
+h1 {
+    font-size: 24px;
+    font-weight: 600;
+    margin-bottom: 24px;
+    padding-bottom: 16px;
+    border-bottom: 1px solid var(--border-color);
+}
+
+h2 {
+    font-size: 16px;
+    font-weight: 600;
+    margin-bottom: 16px;
+    color: var(--text-secondary);
+}
+
+.section {
+    margin-bottom: 32px;
+}
+
+.preset-list {
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
+    margin-bottom: 16px;
+}
+
+.preset-card {
+    background: var(--bg-secondary);
+    border: 1px solid var(--border-color);
+    border-radius: 8px;
+    padding: 16px;
+    cursor: pointer;
+    transition: all 0.2s ease;
+}
+
+.preset-card:hover {
+    background: var(--bg-hover);
+}
+
+.preset-card.active {
+    border-color: var(--accent-color);
+    box-shadow: 0 0 0 1px var(--accent-color);
+}
+
+.preset-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 8px;
+}
+
+.preset-name {
+    font-weight: 600;
+    font-size: 15px;
+}
+
+.preset-badge {
+    background: var(--accent-color);
+    color: white;
+    font-size: 11px;
+    padding: 2px 8px;
+    border-radius: 10px;
+}
+
+.preset-info {
+    font-size: 13px;
+    color: var(--text-secondary);
+}
+
+.preset-actions {
+    display: flex;
+    gap: 8px;
+    margin-top: 12px;
+}
+
+.btn {
+    padding: 8px 16px;
+    border: none;
+    border-radius: 6px;
+    font-size: 14px;
+    cursor: pointer;
+    transition: all 0.2s ease;
+    font-weight: 500;
+}
+
+.btn-primary {
+    background: var(--accent-color);
+    color: white;
+}
+
+.btn-primary:hover {
+    background: var(--accent-hover);
+}
+
+.btn-secondary {
+    background: var(--bg-secondary);
+    color: var(--text-primary);
+    border: 1px solid var(--border-color);
+}
+
+.btn-secondary:hover {
+    background: var(--bg-hover);
+}
+
+.btn-danger {
+    background: var(--danger-color);
+    color: white;
+}
+
+.btn-danger:hover {
+    opacity: 0.9;
+}
+
+.btn-sm {
+    padding: 6px 12px;
+    font-size: 13px;
+}
+
+.empty-state {
+    text-align: center;
+    padding: 40px 20px;
+    color: var(--text-secondary);
+}
+
+.empty-state p {
+    margin-bottom: 16px;
+}
+
+/* Modal */
+.modal-overlay {
+    display: none;
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background: rgba(0, 0, 0, 0.5);
+    z-index: 100;
+    align-items: center;
+    justify-content: center;
+}
+
+.modal-overlay.show {
+    display: flex;
+}
+
+.modal {
+    background: var(--bg-primary);
+    border-radius: 12px;
+    width: 90%;
+    max-width: 480px;
+    max-height: 90vh;
+    overflow-y: auto;
+    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
+}
+
+.modal-header {
+    padding: 20px 24px;
+    border-bottom: 1px solid var(--border-color);
+}
+
+.modal-header h3 {
+    font-size: 18px;
+    font-weight: 600;
+}
+
+.modal-body {
+    padding: 24px;
+}
+
+.modal-footer {
+    padding: 16px 24px;
+    border-top: 1px solid var(--border-color);
+    display: flex;
+    justify-content: flex-end;
+    gap: 12px;
+}
+
+.form-group {
+    margin-bottom: 20px;
+}
+
+.form-group label {
+    display: block;
+    font-size: 14px;
+    font-weight: 500;
+    margin-bottom: 6px;
+}
+
+.form-group input,
+.form-group select {
+    width: 100%;
+    padding: 10px 12px;
+    border: 1px solid var(--border-color);
+    border-radius: 6px;
+    font-size: 14px;
+    background: var(--bg-primary);
+    color: var(--text-primary);
+}
+
+.form-group input:focus,
+.form-group select:focus {
+    outline: none;
+    border-color: var(--accent-color);
+    box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.2);
+}
+
+.form-group .hint {
+    font-size: 12px;
+    color: var(--text-secondary);
+    margin-top: 4px;
+}
+
+.loading {
+    display: inline-block;
+    width: 16px;
+    height: 16px;
+    border: 2px solid var(--border-color);
+    border-top-color: var(--accent-color);
+    border-radius: 50%;
+    animation: spin 0.8s linear infinite;
+}
+
+@keyframes spin {
+    to {
+        transform: rotate(360deg);
+    }
+}
+
+.toast {
+    position: fixed;
+    bottom: 24px;
+    left: 50%;
+    transform: translateX(-50%);
+    background: var(--text-primary);
+    color: var(--bg-primary);
+    padding: 12px 24px;
+    border-radius: 8px;
+    font-size: 14px;
+    z-index: 200;
+    opacity: 0;
+    transition: opacity 0.3s ease;
+}
+
+.toast.show {
+    opacity: 1;
+}
+
+.toast.success {
+    background: var(--success-color);
+    color: white;
+}
+
+.toast.error {
+    background: var(--danger-color);
+    color: white;
+}
+
+/* Inline style replacements */
+.delete-warning {
+    color: var(--text-secondary);
+    margin-top: 8px;
+    font-size: 14px;
+}

electron/settings/settings.js

@@ -0,0 +1,311 @@
+// Settings page JavaScript
+// This file handles the UI interactions for the settings window
+
+let presets = []
+let currentPresetId = null
+let editingPresetId = null
+let deletingPresetId = null
+
+// DOM Elements
+const presetList = document.getElementById("preset-list")
+const addPresetBtn = document.getElementById("add-preset-btn")
+const presetModal = document.getElementById("preset-modal")
+const deleteModal = document.getElementById("delete-modal")
+const presetForm = document.getElementById("preset-form")
+const modalTitle = document.getElementById("modal-title")
+const toast = document.getElementById("toast")
+
+// Form fields
+const presetIdField = document.getElementById("preset-id")
+const presetNameField = document.getElementById("preset-name")
+const aiProviderField = document.getElementById("ai-provider")
+const aiModelField = document.getElementById("ai-model")
+const aiApiKeyField = document.getElementById("ai-api-key")
+const aiBaseUrlField = document.getElementById("ai-base-url")
+const temperatureField = document.getElementById("temperature")
+
+// Buttons
+const cancelBtn = document.getElementById("cancel-btn")
+const saveBtn = document.getElementById("save-btn")
+const deleteCancelBtn = document.getElementById("delete-cancel-btn")
+const deleteConfirmBtn = document.getElementById("delete-confirm-btn")
+
+// Initialize
+document.addEventListener("DOMContentLoaded", async () => {
+    await loadPresets()
+    setupEventListeners()
+})
+
+// Load presets from main process
+async function loadPresets() {
+    try {
+        presets = await window.settingsAPI.getPresets()
+        currentPresetId = await window.settingsAPI.getCurrentPresetId()
+        renderPresets()
+    } catch (error) {
+        console.error("Failed to load presets:", error)
+        showToast("Failed to load presets", "error")
+    }
+}
+
+// Render presets list
+function renderPresets() {
+    if (presets.length === 0) {
+        presetList.innerHTML = `
+            <div class="empty-state">
+                <p>No presets configured yet.</p>
+                <p>Add a preset to quickly switch between different AI configurations.</p>
+            </div>
+        `
+        return
+    }
+
+    presetList.innerHTML = presets
+        .map((preset) => {
+            const isActive = preset.id === currentPresetId
+            const providerLabel = getProviderLabel(preset.config.AI_PROVIDER)
+
+            return `
+            <div class="preset-card ${isActive ? "active" : ""}" data-id="${preset.id}">
+                <div class="preset-header">
+                    <span class="preset-name">${escapeHtml(preset.name)}</span>
+                    ${isActive ? '<span class="preset-badge">Active</span>' : ""}
+                </div>
+                <div class="preset-info">
+                    ${providerLabel ? `Provider: ${providerLabel}` : "No provider configured"}
+                    ${preset.config.AI_MODEL ? ` • Model: ${escapeHtml(preset.config.AI_MODEL)}` : ""}
+                </div>
+                <div class="preset-actions">
+                    ${!isActive ? `<button class="btn btn-primary btn-sm apply-btn" data-id="${preset.id}">Apply</button>` : ""}
+                    <button class="btn btn-secondary btn-sm edit-btn" data-id="${preset.id}">Edit</button>
+                    <button class="btn btn-secondary btn-sm delete-btn" data-id="${preset.id}">Delete</button>
+                </div>
+            </div>
+        `
+        })
+        .join("")
+
+    // Add event listeners to buttons
+    presetList.querySelectorAll(".apply-btn").forEach((btn) => {
+        btn.addEventListener("click", (e) => {
+            e.stopPropagation()
+            applyPreset(btn.dataset.id)
+        })
+    })
+
+    presetList.querySelectorAll(".edit-btn").forEach((btn) => {
+        btn.addEventListener("click", (e) => {
+            e.stopPropagation()
+            openEditModal(btn.dataset.id)
+        })
+    })
+
+    presetList.querySelectorAll(".delete-btn").forEach((btn) => {
+        btn.addEventListener("click", (e) => {
+            e.stopPropagation()
+            openDeleteModal(btn.dataset.id)
+        })
+    })
+}
+
+// Setup event listeners
+function setupEventListeners() {
+    addPresetBtn.addEventListener("click", () => openAddModal())
+    cancelBtn.addEventListener("click", () => closeModal())
+    saveBtn.addEventListener("click", () => savePreset())
+    deleteCancelBtn.addEventListener("click", () => closeDeleteModal())
+    deleteConfirmBtn.addEventListener("click", () => confirmDelete())
+
+    // Close modal on overlay click
+    presetModal.addEventListener("click", (e) => {
+        if (e.target === presetModal) closeModal()
+    })
+    deleteModal.addEventListener("click", (e) => {
+        if (e.target === deleteModal) closeDeleteModal()
+    })
+
+    // Handle Enter key in form
+    presetForm.addEventListener("keydown", (e) => {
+        if (e.key === "Enter") {
+            e.preventDefault()
+            savePreset()
+        }
+    })
+}
+
+// Open add modal
+function openAddModal() {
+    editingPresetId = null
+    modalTitle.textContent = "Add Preset"
+    presetForm.reset()
+    presetIdField.value = ""
+    presetModal.classList.add("show")
+    presetNameField.focus()
+}
+
+// Open edit modal
+function openEditModal(id) {
+    const preset = presets.find((p) => p.id === id)
+    if (!preset) return
+
+    editingPresetId = id
+    modalTitle.textContent = "Edit Preset"
+
+    presetIdField.value = preset.id
+    presetNameField.value = preset.name
+    aiProviderField.value = preset.config.AI_PROVIDER || ""
+    aiModelField.value = preset.config.AI_MODEL || ""
+    aiApiKeyField.value = preset.config.AI_API_KEY || ""
+    aiBaseUrlField.value = preset.config.AI_BASE_URL || ""
+    temperatureField.value = preset.config.TEMPERATURE || ""
+
+    presetModal.classList.add("show")
+    presetNameField.focus()
+}
+
+// Close modal
+function closeModal() {
+    presetModal.classList.remove("show")
+    editingPresetId = null
+}
+
+// Open delete modal
+function openDeleteModal(id) {
+    const preset = presets.find((p) => p.id === id)
+    if (!preset) return
+
+    deletingPresetId = id
+    document.getElementById("delete-preset-name").textContent = preset.name
+    deleteModal.classList.add("show")
+}
+
+// Close delete modal
+function closeDeleteModal() {
+    deleteModal.classList.remove("show")
+    deletingPresetId = null
+}
+
+// Save preset
+async function savePreset() {
+    const name = presetNameField.value.trim()
+    if (!name) {
+        showToast("Please enter a preset name", "error")
+        presetNameField.focus()
+        return
+    }
+
+    const preset = {
+        id: editingPresetId || undefined,
+        name: name,
+        config: {
+            AI_PROVIDER: aiProviderField.value || undefined,
+            AI_MODEL: aiModelField.value.trim() || undefined,
+            AI_API_KEY: aiApiKeyField.value.trim() || undefined,
+            AI_BASE_URL: aiBaseUrlField.value.trim() || undefined,
+            TEMPERATURE: temperatureField.value.trim() || undefined,
+        },
+    }
+
+    // Remove undefined values
+    Object.keys(preset.config).forEach((key) => {
+        if (preset.config[key] === undefined) {
+            delete preset.config[key]
+        }
+    })
+
+    try {
+        saveBtn.disabled = true
+        saveBtn.innerHTML = '<span class="loading"></span>'
+
+        await window.settingsAPI.savePreset(preset)
+        await loadPresets()
+        closeModal()
+        showToast(
+            editingPresetId ? "Preset updated" : "Preset created",
+            "success",
+        )
+    } catch (error) {
+        console.error("Failed to save preset:", error)
+        showToast("Failed to save preset", "error")
+    } finally {
+        saveBtn.disabled = false
+        saveBtn.textContent = "Save"
+    }
+}
+
+// Confirm delete
+async function confirmDelete() {
+    if (!deletingPresetId) return
+
+    try {
+        deleteConfirmBtn.disabled = true
+        deleteConfirmBtn.innerHTML = '<span class="loading"></span>'
+
+        await window.settingsAPI.deletePreset(deletingPresetId)
+        await loadPresets()
+        closeDeleteModal()
+        showToast("Preset deleted", "success")
+    } catch (error) {
+        console.error("Failed to delete preset:", error)
+        showToast("Failed to delete preset", "error")
+    } finally {
+        deleteConfirmBtn.disabled = false
+        deleteConfirmBtn.textContent = "Delete"
+    }
+}
+
+// Apply preset
+async function applyPreset(id) {
+    try {
+        const btn = presetList.querySelector(`.apply-btn[data-id="${id}"]`)
+        if (btn) {
+            btn.disabled = true
+            btn.innerHTML = '<span class="loading"></span>'
+        }
+
+        const result = await window.settingsAPI.applyPreset(id)
+        if (result.success) {
+            currentPresetId = id
+            renderPresets()
+            showToast("Preset applied, server restarting...", "success")
+        } else {
+            showToast(result.error || "Failed to apply preset", "error")
+        }
+    } catch (error) {
+        console.error("Failed to apply preset:", error)
+        showToast("Failed to apply preset", "error")
+    }
+}
+
+// Get provider display label
+function getProviderLabel(provider) {
+    const labels = {
+        openai: "OpenAI",
+        anthropic: "Anthropic",
+        google: "Google AI",
+        azure: "Azure OpenAI",
+        bedrock: "AWS Bedrock",
+        openrouter: "OpenRouter",
+        deepseek: "DeepSeek",
+        siliconflow: "SiliconFlow",
+        ollama: "Ollama",
+    }
+    return labels[provider] || provider
+}
+
+// Show toast notification
+function showToast(message, type = "") {
+    toast.textContent = message
+    toast.className = "toast show" + (type ? ` ${type}` : "")
+
+    setTimeout(() => {
+        toast.classList.remove("show")
+    }, 3000)
+}
+
+// Escape HTML to prevent XSS
+function escapeHtml(text) {
+    const div = document.createElement("div")
+    div.textContent = text
+    return div.innerHTML
+}

lib/types/model-config.ts

@@ -83,22 +83,24 @@ export const PROVIDER_INFO: Record<
 // Suggested models per provider for quick add
 export const SUGGESTED_MODELS: Record<ProviderName, string[]> = {
     openai: [
-        // GPT-4o series (latest)
+        "gpt-5.2-pro",
+        "gpt-5.2-chat-latest",
+        "gpt-5.2",
+        "gpt-5.1-codex-mini",
+        "gpt-5.1-codex",
+        "gpt-5.1-chat-latest",
+        "gpt-5.1",
+        "gpt-5-pro",
+        "gpt-5",
+        "gpt-5-mini",
+        "gpt-5-nano",
+        "gpt-5-codex",
+        "gpt-5-chat-latest",
+        "gpt-4.1",
+        "gpt-4.1-mini",
+        "gpt-4.1-nano",
         "gpt-4o",
         "gpt-4o-mini",
-        "gpt-4o-2024-11-20",
-        // GPT-4 Turbo
-        "gpt-4-turbo",
-        "gpt-4-turbo-preview",
-        // o1/o3 reasoning models
-        "o1",
-        "o1-mini",
-        "o1-preview",
-        "o3-mini",
-        // GPT-4
-        "gpt-4",
-        // GPT-3.5
-        "gpt-3.5-turbo",
     ],
     anthropic: [
         // Claude 4.5 series (latest)

package-lock.json

@@ -1,12 +1,12 @@
 {
     "name": "next-ai-draw-io",
-    "version": "0.4.6",
+    "version": "0.4.7",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "next-ai-draw-io",
-            "version": "0.4.6",
+            "version": "0.4.7",
             "license": "Apache-2.0",
             "dependencies": {
                 "@ai-sdk/amazon-bedrock": "^4.0.1",

package.json

@@ -1,6 +1,6 @@
 {
     "name": "next-ai-draw-io",
-    "version": "0.4.6",
+    "version": "0.4.7",
     "license": "Apache-2.0",
     "private": true,
     "main": "dist-electron/main/index.js",
@@ -14,7 +14,7 @@
         "prepare": "husky",
         "electron:dev": "node scripts/electron-dev.mjs",
         "electron:build": "npm run build && npm run electron:compile",
-        "electron:compile": "npx esbuild electron/main/index.ts electron/preload/index.ts --bundle --platform=node --outdir=dist-electron --external:electron --sourcemap --packages=external",
+        "electron:compile": "npx esbuild electron/main/index.ts electron/preload/index.ts electron/preload/settings.ts --bundle --platform=node --outdir=dist-electron --external:electron --sourcemap --packages=external && npx shx cp -r electron/settings dist-electron/",
         "electron:start": "npx cross-env NODE_ENV=development npx electron .",
         "electron:prepare": "node scripts/prepare-electron-build.mjs",
         "dist": "npm run electron:build && npm run electron:prepare && npx electron-builder",

renovate.json

@@ -0,0 +1,40 @@
+{
+    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+    "extends": ["config:recommended"],
+    "schedule": ["after 10am on saturday"],
+    "timezone": "Asia/Tokyo",
+    "packageRules": [
+        {
+            "matchUpdateTypes": ["minor", "patch"],
+            "matchPackagePatterns": ["*"],
+            "groupName": "minor and patch dependencies",
+            "automerge": true
+        },
+        {
+            "matchUpdateTypes": ["major"],
+            "matchPackagePatterns": ["*"],
+            "automerge": false
+        },
+        {
+            "matchPackagePatterns": ["@ai-sdk/*"],
+            "groupName": "AI SDK packages"
+        },
+        {
+            "matchPackagePatterns": ["@radix-ui/*"],
+            "groupName": "Radix UI packages"
+        },
+        {
+            "matchPackagePatterns": ["electron", "electron-builder"],
+            "groupName": "Electron packages",
+            "automerge": false
+        },
+        {
+            "matchPackagePatterns": ["@ai-sdk/*", "ai", "next"],
+            "groupName": "Core framework packages",
+            "automerge": false
+        }
+    ],
+    "vulnerabilityAlerts": {
+        "enabled": true
+    }
+}

scripts/electron-dev.mjs

@@ -2,13 +2,17 @@
 
 /**
  * Development script for running Electron with Next.js
- * 1. Starts Next.js dev server
- * 2. Waits for it to be ready
- * 3. Compiles Electron TypeScript
- * 4. Launches Electron
+ * 1. Reads preset configuration (if exists)
+ * 2. Starts Next.js dev server with preset env vars
+ * 3. Waits for it to be ready
+ * 4. Compiles Electron TypeScript
+ * 5. Launches Electron
+ * 6. Watches for preset changes and restarts Next.js
  */
 
 import { spawn } from "node:child_process"
+import { existsSync, readFileSync, watch } from "node:fs"
+import os from "node:os"
 import path from "node:path"
 import { fileURLToPath } from "node:url"
 
@@ -18,6 +22,64 @@ const rootDir = path.join(__dirname, "..")
 const NEXT_PORT = 6002
 const NEXT_URL = `http://localhost:${NEXT_PORT}`
 
+/**
+ * Get the user data path (same as Electron's app.getPath("userData"))
+ */
+function getUserDataPath() {
+    const appName = "next-ai-draw-io"
+    switch (process.platform) {
+        case "darwin":
+            return path.join(
+                os.homedir(),
+                "Library",
+                "Application Support",
+                appName,
+            )
+        case "win32":
+            return path.join(
+                process.env.APPDATA ||
+                    path.join(os.homedir(), "AppData", "Roaming"),
+                appName,
+            )
+        default:
+            return path.join(os.homedir(), ".config", appName)
+    }
+}
+
+/**
+ * Load preset configuration from config file
+ */
+function loadPresetConfig() {
+    const configPath = path.join(getUserDataPath(), "config-presets.json")
+
+    if (!existsSync(configPath)) {
+        console.log("📋 No preset configuration found, using .env.local")
+        return null
+    }
+
+    try {
+        const content = readFileSync(configPath, "utf-8")
+        const data = JSON.parse(content)
+
+        if (!data.currentPresetId) {
+            console.log("📋 No active preset, using .env.local")
+            return null
+        }
+
+        const preset = data.presets.find((p) => p.id === data.currentPresetId)
+        if (!preset) {
+            console.log("📋 Active preset not found, using .env.local")
+            return null
+        }
+
+        console.log(`📋 Using preset: "${preset.name}"`)
+        return preset.config
+    } catch (error) {
+        console.error("Failed to load preset config:", error.message)
+        return null
+    }
+}
+
 /**
  * Wait for the Next.js server to be ready
  */
@@ -67,14 +129,25 @@ function runCommand(command, args, options = {}) {
 }
 
 /**
- * Start Next.js dev server
+ * Start Next.js dev server with preset environment
  */
-function startNextServer() {
+function startNextServer(presetEnv) {
+    const env = { ...process.env }
+
+    // Apply preset environment variables
+    if (presetEnv) {
+        for (const [key, value] of Object.entries(presetEnv)) {
+            if (value !== undefined && value !== "") {
+                env[key] = value
+            }
+        }
+    }
+
     const nextProcess = spawn("npm", ["run", "dev"], {
         cwd: rootDir,
         stdio: "inherit",
         shell: true,
-        env: process.env,
+        env,
     })
 
     nextProcess.on("error", (err) => {
@@ -90,9 +163,12 @@ function startNextServer() {
 async function main() {
     console.log("🚀 Starting Electron development environment...\n")
 
-    // Start Next.js dev server
+    // Load preset configuration
+    const presetEnv = loadPresetConfig()
+
+    // Start Next.js dev server with preset env
     console.log("1. Starting Next.js development server...")
-    const nextProcess = startNextServer()
+    let nextProcess = startNextServer(presetEnv)
 
     // Wait for Next.js to be ready
     try {
@@ -127,14 +203,75 @@ async function main() {
         },
     })
 
+    // Watch for preset config changes
+    const configPath = path.join(getUserDataPath(), "config-presets.json")
+    let configWatcher = null
+    let restartPending = false
+
+    function setupConfigWatcher() {
+        if (!existsSync(path.dirname(configPath))) {
+            // Directory doesn't exist yet, check again later
+            setTimeout(setupConfigWatcher, 5000)
+            return
+        }
+
+        try {
+            configWatcher = watch(
+                configPath,
+                { persistent: false },
+                async (eventType) => {
+                    if (eventType === "change" && !restartPending) {
+                        restartPending = true
+                        console.log(
+                            "\n🔄 Preset configuration changed, restarting Next.js server...",
+                        )
+
+                        // Kill current Next.js process
+                        nextProcess.kill()
+
+                        // Wait a bit for process to die
+                        await new Promise((r) => setTimeout(r, 1000))
+
+                        // Reload preset and restart
+                        const newPresetEnv = loadPresetConfig()
+                        nextProcess = startNextServer(newPresetEnv)
+
+                        try {
+                            await waitForServer(NEXT_URL)
+                            console.log(
+                                "✅ Next.js server restarted with new configuration\n",
+                            )
+                        } catch (err) {
+                            console.error(
+                                "❌ Failed to restart Next.js:",
+                                err.message,
+                            )
+                        }
+
+                        restartPending = false
+                    }
+                },
+            )
+            console.log("👀 Watching for preset configuration changes...")
+        } catch (err) {
+            // File might not exist yet, that's ok
+            setTimeout(setupConfigWatcher, 5000)
+        }
+    }
+
+    // Start watching after a delay (config file might not exist yet)
+    setTimeout(setupConfigWatcher, 2000)
+
     electronProcess.on("close", (code) => {
         console.log(`\nElectron exited with code ${code}`)
+        if (configWatcher) configWatcher.close()
         nextProcess.kill()
         process.exit(code || 0)
     })
 
     electronProcess.on("error", (err) => {
         console.error("Electron error:", err)
+        if (configWatcher) configWatcher.close()
         nextProcess.kill()
         process.exit(1)
     })
@@ -142,6 +279,7 @@ async function main() {
     // Handle termination signals
     const cleanup = () => {
         console.log("\n🛑 Shutting down...")
+        if (configWatcher) configWatcher.close()
         electronProcess.kill()
         nextProcess.kill()
         process.exit(0)