feat(webui): add configuration presets for Claude CLI

- Add backend storage logic in `src/utils/claude-config.js` to save/load/delete presets
- Add API endpoints (`GET`, `POST`, `DELETE`) for presets in `src/webui/index.js`
- Update `public/views/settings.html` with new Presets UI card and modals
- Update `public/js/components/claude-config.js` with auto-load logic and unsaved changes protection
- Add translations (EN/ZH) for new UI elements in `public/js/store.js`
- Add integration tests in `tests/frontend/test-frontend-settings.cjs`
- Update compiled CSS

Co-Authored-By: Claude <noreply@anthropic.com>

public/js/components/claude-config.js

@@ -12,6 +12,13 @@ window.Components.claudeConfig = () => ({
     restoring: false,
     gemini1mSuffix: false,
 
+    // Presets state
+    presets: [],
+    selectedPresetName: '',
+    savingPreset: false,
+    deletingPreset: false,
+    pendingPresetName: '', // For unsaved changes confirmation
+
     // Model fields that may contain Gemini model names
     geminiModelFields: [
         'ANTHROPIC_MODEL',
@@ -25,12 +32,14 @@ window.Components.claudeConfig = () => ({
         // Only fetch config if this is the active sub-tab
         if (this.activeTab === 'claude') {
             this.fetchConfig();
+            this.fetchPresets();
         }
 
         // Watch local activeTab (from parent settings scope, skip initial trigger)
         this.$watch('activeTab', (tab, oldTab) => {
             if (tab === 'claude' && oldTab !== undefined) {
                 this.fetchConfig();
+                this.fetchPresets();
             }
         });
 
@@ -171,5 +180,237 @@ window.Components.claudeConfig = () => ({
         } finally {
             this.restoring = false;
         }
+    },
+
+    // ==========================================
+    // Presets Management
+    // ==========================================
+
+    /**
+     * Fetch all saved presets from the server
+     */
+    async fetchPresets() {
+        const password = Alpine.store('global').webuiPassword;
+        try {
+            const { response, newPassword } = await window.utils.request('/api/claude/presets', {}, password);
+            if (newPassword) Alpine.store('global').webuiPassword = newPassword;
+
+            if (!response.ok) throw new Error(`HTTP ${response.status}`);
+            const data = await response.json();
+            if (data.status === 'ok') {
+                this.presets = data.presets || [];
+                // Auto-select first preset if none selected
+                if (this.presets.length > 0 && !this.selectedPresetName) {
+                    this.selectedPresetName = this.presets[0].name;
+                }
+            }
+        } catch (e) {
+            console.error('Failed to fetch presets:', e);
+        }
+    },
+
+    /**
+     * Load the selected preset into the form (does not save to Claude CLI)
+     */
+    loadSelectedPreset() {
+        const preset = this.presets.find(p => p.name === this.selectedPresetName);
+        if (!preset) {
+            return;
+        }
+
+        // Merge preset config into current config.env
+        this.config.env = { ...this.config.env, ...preset.config };
+
+        // Update Gemini 1M toggle based on merged config (not just preset)
+        this.gemini1mSuffix = this.detectGemini1mSuffix();
+
+        Alpine.store('global').showToast(
+            Alpine.store('global').t('presetLoaded') || `Preset "${preset.name}" loaded. Click "Apply to Claude CLI" to save.`,
+            'success'
+        );
+    },
+
+    /**
+     * Check if current config matches any saved preset
+     * @returns {boolean} True if current config matches a preset
+     */
+    currentConfigMatchesPreset() {
+        const relevantKeys = [
+            'ANTHROPIC_BASE_URL',
+            'ANTHROPIC_AUTH_TOKEN',
+            'ANTHROPIC_MODEL',
+            'CLAUDE_CODE_SUBAGENT_MODEL',
+            'ANTHROPIC_DEFAULT_OPUS_MODEL',
+            'ANTHROPIC_DEFAULT_SONNET_MODEL',
+            'ANTHROPIC_DEFAULT_HAIKU_MODEL',
+            'ENABLE_EXPERIMENTAL_MCP_CLI'
+        ];
+
+        for (const preset of this.presets) {
+            let matches = true;
+            for (const key of relevantKeys) {
+                const currentVal = this.config.env[key] || '';
+                const presetVal = preset.config[key] || '';
+                if (currentVal !== presetVal) {
+                    matches = false;
+                    break;
+                }
+            }
+            if (matches) return true;
+        }
+        return false;
+    },
+
+    /**
+     * Handle preset selection change - auto-load with unsaved changes warning
+     * @param {string} newPresetName - The newly selected preset name
+     */
+    async onPresetSelect(newPresetName) {
+        if (!newPresetName || newPresetName === this.selectedPresetName) return;
+
+        // Check if current config has unsaved changes (doesn't match any preset)
+        const hasUnsavedChanges = !this.currentConfigMatchesPreset();
+
+        if (hasUnsavedChanges) {
+            // Store pending preset and show confirmation modal
+            this.pendingPresetName = newPresetName;
+            document.getElementById('unsaved_changes_modal').showModal();
+            return;
+        }
+
+        this.selectedPresetName = newPresetName;
+        this.loadSelectedPreset();
+    },
+
+    /**
+     * Confirm loading preset despite unsaved changes
+     */
+    confirmLoadPreset() {
+        document.getElementById('unsaved_changes_modal').close();
+        this.selectedPresetName = this.pendingPresetName;
+        this.pendingPresetName = '';
+        this.loadSelectedPreset();
+    },
+
+    /**
+     * Cancel loading preset - revert dropdown selection
+     */
+    cancelLoadPreset() {
+        document.getElementById('unsaved_changes_modal').close();
+        // Revert the dropdown to current selection
+        const select = document.querySelector('[aria-label="Select preset"]');
+        if (select) select.value = this.selectedPresetName;
+        this.pendingPresetName = '';
+    },
+
+    /**
+     * Save the current config as a new preset
+     */
+    async saveCurrentAsPreset() {
+        // Show the save preset modal
+        document.getElementById('save_preset_modal').showModal();
+    },
+
+    /**
+     * Execute preset save after user enters name
+     */
+    async executeSavePreset(name) {
+        if (!name || !name.trim()) {
+            Alpine.store('global').showToast('Preset name is required', 'error');
+            return;
+        }
+
+        this.savingPreset = true;
+        const password = Alpine.store('global').webuiPassword;
+
+        try {
+            // Save only relevant env vars
+            const relevantKeys = [
+                'ANTHROPIC_BASE_URL',
+                'ANTHROPIC_AUTH_TOKEN',
+                'ANTHROPIC_MODEL',
+                'CLAUDE_CODE_SUBAGENT_MODEL',
+                'ANTHROPIC_DEFAULT_OPUS_MODEL',
+                'ANTHROPIC_DEFAULT_SONNET_MODEL',
+                'ANTHROPIC_DEFAULT_HAIKU_MODEL',
+                'ENABLE_EXPERIMENTAL_MCP_CLI'
+            ];
+            const presetConfig = {};
+            relevantKeys.forEach(k => {
+                if (this.config.env[k]) {
+                    presetConfig[k] = this.config.env[k];
+                }
+            });
+
+            const { response, newPassword } = await window.utils.request('/api/claude/presets', {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({ name: name.trim(), config: presetConfig })
+            }, password);
+            if (newPassword) Alpine.store('global').webuiPassword = newPassword;
+
+            if (!response.ok) throw new Error(`HTTP ${response.status}`);
+            const data = await response.json();
+            if (data.status === 'ok') {
+                this.presets = data.presets || [];
+                this.selectedPresetName = name.trim();
+                Alpine.store('global').showToast(
+                    Alpine.store('global').t('presetSaved') || `Preset "${name}" saved`,
+                    'success'
+                );
+                document.getElementById('save_preset_modal').close();
+            } else {
+                throw new Error(data.error || 'Save failed');
+            }
+        } catch (e) {
+            Alpine.store('global').showToast('Failed to save preset: ' + e.message, 'error');
+        } finally {
+            this.savingPreset = false;
+        }
+    },
+
+    /**
+     * Delete the selected preset
+     */
+    async deleteSelectedPreset() {
+        if (!this.selectedPresetName) {
+            Alpine.store('global').showToast('No preset selected', 'warning');
+            return;
+        }
+
+        // Confirm deletion
+        if (!confirm(`Delete preset "${this.selectedPresetName}"?`)) {
+            return;
+        }
+
+        this.deletingPreset = true;
+        const password = Alpine.store('global').webuiPassword;
+
+        try {
+            const { response, newPassword } = await window.utils.request(
+                `/api/claude/presets/${encodeURIComponent(this.selectedPresetName)}`,
+                { method: 'DELETE' },
+                password
+            );
+            if (newPassword) Alpine.store('global').webuiPassword = newPassword;
+
+            if (!response.ok) throw new Error(`HTTP ${response.status}`);
+            const data = await response.json();
+            if (data.status === 'ok') {
+                this.presets = data.presets || [];
+                // Select first available preset or clear selection
+                this.selectedPresetName = this.presets.length > 0 ? this.presets[0].name : '';
+                Alpine.store('global').showToast(
+                    Alpine.store('global').t('presetDeleted') || 'Preset deleted',
+                    'success'
+                );
+            } else {
+                throw new Error(data.error || 'Delete failed');
+            }
+        } catch (e) {
+            Alpine.store('global').showToast('Failed to delete preset: ' + e.message, 'error');
+        } finally {
+            this.deletingPreset = false;
+        }
     }
 });

public/js/store.js

@@ -131,6 +131,24 @@ document.addEventListener('alpine:init', () => {
                 claudeSettingsAlertPrefix: "Settings below directly modify",
         claudeSettingsAlertSuffix: "Restart Claude CLI to apply.",
                 applyToClaude: "Apply to Claude CLI",
+                // Presets
+                configPresets: "Configuration Presets",
+                saveAsPreset: "Save as Preset",
+                deletePreset: "Delete Preset",
+                loadPreset: "Load preset into form",
+                load: "Load",
+                presetHint: "Select a preset to load it. Click \"Apply to Claude CLI\" to save changes.",
+                presetLoaded: "Preset loaded. Click \"Apply to Claude CLI\" to save.",
+                presetSaved: "Preset saved",
+                presetDeleted: "Preset deleted",
+                unsavedChangesTitle: "Unsaved Changes",
+                unsavedChangesMessage: "Your current configuration doesn't match any saved preset. If you switch, your current unsaved settings will be lost.",
+                loadAnyway: "Load Anyway",
+                savePresetTitle: "Save Preset",
+                savePresetDesc: "Save the current configuration as a reusable preset.",
+                presetName: "Preset Name",
+                presetNamePlaceholder: "e.g., My Work Setup",
+                savePreset: "Save Preset",
                 // Settings - Server
                 port: "Port",
                 uiVersion: "UI Version",
@@ -389,6 +407,24 @@ document.addEventListener('alpine:init', () => {
                 claudeSettingsAlertPrefix: "以下设置直接修改",
         claudeSettingsAlertSuffix: "重启 Claude CLI 生效。",
                 applyToClaude: "应用到 Claude CLI",
+                // Presets
+                configPresets: "配置预设",
+                saveAsPreset: "另存为预设",
+                deletePreset: "删除预设",
+                loadPreset: "加载预设到表单",
+                load: "加载",
+                presetHint: "选择预设以加载。点击“应用到 Claude CLI”以保存更改。",
+                presetLoaded: "预设已加载。点击“应用到 Claude CLI”以保存。",
+                presetSaved: "预设已保存",
+                presetDeleted: "预设已删除",
+                unsavedChangesTitle: "未保存的更改",
+                unsavedChangesMessage: "当前配置与任何已保存的预设都不匹配。如果切换预设，当前未保存的设置将会丢失。",
+                loadAnyway: "仍然加载",
+                savePresetTitle: "保存预设",
+                savePresetDesc: "将当前配置保存为可重复使用的预设。",
+                presetName: "预设名称",
+                presetNamePlaceholder: "例如：工作配置",
+                savePreset: "保存预设",
                 // Settings - Server
                 port: "端口",
                 uiVersion: "UI 版本",

public/views/settings.html

@@ -204,6 +204,52 @@
                     </span>
                 </div>
 
+                <!-- Configuration Presets -->
+                <div class="card bg-space-900/30 border border-neon-cyan/30 p-5">
+                    <div class="flex items-center justify-between mb-4">
+                        <div class="flex items-center gap-2">
+                            <svg xmlns="http://www.w3.org/2000/svg" class="w-4 h-4 text-neon-cyan" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 5a2 2 0 012-2h10a2 2 0 012 2v16l-7-3.5L5 21V5z" />
+                            </svg>
+                            <label class="text-xs uppercase text-neon-cyan font-semibold" x-text="$store.global.t('configPresets') || 'Configuration Presets'">Configuration Presets</label>
+                        </div>
+                        <button class="btn btn-xs btn-ghost text-neon-cyan hover:bg-neon-cyan/10 gap-1"
+                            @click="saveCurrentAsPreset()"
+                            :disabled="savingPreset">
+                            <svg x-show="!savingPreset" xmlns="http://www.w3.org/2000/svg" class="w-3.5 h-3.5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4v16m8-8H4" />
+                            </svg>
+                            <span x-show="!savingPreset" x-text="$store.global.t('saveAsPreset') || 'Save as Preset'">Save as Preset</span>
+                            <span x-show="savingPreset" class="loading loading-spinner loading-xs"></span>
+                        </button>
+                    </div>
+                    <div class="flex gap-2">
+                        <select
+                            class="select select-sm bg-space-800 border-space-border text-white flex-1 font-mono text-xs"
+                            :disabled="presets.length === 0"
+                            :value="selectedPresetName"
+                            @change="onPresetSelect($event.target.value)"
+                            aria-label="Select preset">
+                            <option value="" disabled x-show="presets.length === 0">No presets available</option>
+                            <template x-for="preset in presets" :key="preset.name">
+                                <option :value="preset.name" x-text="preset.name" :selected="preset.name === selectedPresetName"></option>
+                            </template>
+                        </select>
+                        <button class="btn btn-sm btn-ghost text-red-400 hover:bg-red-500/10"
+                            @click="deleteSelectedPreset()"
+                            :disabled="!selectedPresetName || presets.length === 0 || deletingPreset"
+                            :title="$store.global.t('deletePreset') || 'Delete preset'">
+                            <span x-show="!deletingPreset">
+                                <svg xmlns="http://www.w3.org/2000/svg" class="w-4 h-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+                                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" />
+                                </svg>
+                            </span>
+                            <span x-show="deletingPreset" class="loading loading-spinner loading-xs"></span>
+                        </button>
+                    </div>
+                    <p class="text-[10px] text-gray-600 mt-2" x-text="$store.global.t('presetHint') || 'Select a preset to load it. Click \"Apply to Claude CLI\" to save changes.'">Select a preset to load it. Click "Apply to Claude CLI" to save changes.</p>
+                </div>
+
                 <!-- Base URL -->
                 <div class="card bg-space-900/30 border border-space-border/50 p-5">
                     <label class="label text-xs uppercase text-gray-500 font-semibold mb-2"
@@ -570,6 +616,72 @@
                         <button>close</button>
                     </form>
                 </dialog>
+
+                <!-- Unsaved Changes Confirmation Modal -->
+                <dialog id="unsaved_changes_modal" class="modal">
+                    <div class="modal-box bg-space-900 border-2 border-yellow-500/50">
+                        <h3 class="font-bold text-lg text-yellow-400 flex items-center gap-2">
+                            <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z" />
+                            </svg>
+                            <span x-text="$store.global.t('unsavedChangesTitle') || 'Unsaved Changes'">Unsaved Changes</span>
+                        </h3>
+                        <p class="py-4 text-gray-300">
+                            <span x-text="$store.global.t('unsavedChangesMessage') || 'Your current configuration doesn\'t match any saved preset.'">Your current configuration doesn't match any saved preset.</span>
+                            <br><br>
+                            <span class="text-yellow-400/80" x-text="'Load \"' + pendingPresetName + '\" and lose current changes?'"></span>
+                        </p>
+                        <div class="modal-action">
+                            <button class="btn btn-ghost text-gray-400" @click="cancelLoadPreset()"
+                                x-text="$store.global.t('cancel')">Cancel</button>
+                            <button class="btn bg-yellow-500 hover:bg-yellow-600 border-none text-black" @click="confirmLoadPreset()">
+                                <span x-text="$store.global.t('loadAnyway') || 'Load Anyway'">Load Anyway</span>
+                            </button>
+                        </div>
+                    </div>
+                    <form method="dialog" class="modal-backdrop">
+                        <button @click="cancelLoadPreset()">close</button>
+                    </form>
+                </dialog>
+
+                <!-- Save Preset Modal -->
+                <dialog id="save_preset_modal" class="modal" x-data="{ presetName: '' }">
+                    <div class="modal-box bg-space-900 border-2 border-neon-cyan/50">
+                        <h3 class="font-bold text-lg text-neon-cyan flex items-center gap-2">
+                            <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 5a2 2 0 012-2h10a2 2 0 012 2v16l-7-3.5L5 21V5z" />
+                            </svg>
+                            <span x-text="$store.global.t('savePresetTitle') || 'Save Preset'">Save Preset</span>
+                        </h3>
+                        <p class="py-2 text-gray-400 text-sm" x-text="$store.global.t('savePresetDesc') || 'Save the current configuration as a reusable preset.'">
+                            Save the current configuration as a reusable preset.
+                        </p>
+                        <div class="form-control mt-4">
+                            <label class="label">
+                                <span class="label-text text-gray-300" x-text="$store.global.t('presetName') || 'Preset Name'">Preset Name</span>
+                            </label>
+                            <input type="text" x-model="presetName"
+                                class="input input-sm input-bordered bg-space-800 border-space-border text-white w-full"
+                                :placeholder="$store.global.t('presetNamePlaceholder') || 'e.g., My Work Setup'"
+                                @keydown.enter="$root.executeSavePreset(presetName); presetName = ''"
+                                x-init="$watch('$el.closest(\'dialog\').open', open => { if (open) { presetName = ''; $nextTick(() => $el.focus()) } })"
+                                aria-label="Preset name">
+                        </div>
+                        <div class="modal-action">
+                            <button class="btn btn-ghost text-gray-400" @click="presetName = ''; document.getElementById('save_preset_modal').close()"
+                                x-text="$store.global.t('cancel')">Cancel</button>
+                            <button class="btn bg-neon-cyan hover:bg-cyan-600 border-none text-black"
+                                @click="$root.executeSavePreset(presetName); presetName = ''"
+                                :disabled="!presetName.trim() || $root.savingPreset"
+                                :class="{ 'loading': $root.savingPreset }">
+                                <span x-show="!$root.savingPreset" x-text="$store.global.t('savePreset') || 'Save Preset'">Save Preset</span>
+                            </button>
+                        </div>
+                    </div>
+                    <form method="dialog" class="modal-backdrop">
+                        <button @click="presetName = ''">close</button>
+                    </form>
+                </dialog>
             </div>
 
             <!-- Tab 3: Models Configuration -->

src/utils/claude-config.js

@@ -138,3 +138,139 @@ function deepMerge(target, source) {
 function isObject(item) {
     return (item && typeof item === 'object' && !Array.isArray(item));
 }
+
+// ==========================================
+// Claude CLI Presets
+// ==========================================
+
+/**
+ * Default presets based on README examples
+ */
+const DEFAULT_PRESETS = [
+    {
+        name: 'Claude Thinking',
+        config: {
+            ANTHROPIC_AUTH_TOKEN: 'test',
+            ANTHROPIC_BASE_URL: 'http://localhost:8080',
+            ANTHROPIC_MODEL: 'claude-opus-4-5-thinking',
+            ANTHROPIC_DEFAULT_OPUS_MODEL: 'claude-opus-4-5-thinking',
+            ANTHROPIC_DEFAULT_SONNET_MODEL: 'claude-sonnet-4-5-thinking',
+            ANTHROPIC_DEFAULT_HAIKU_MODEL: 'gemini-2.5-flash-lite[1m]',
+            CLAUDE_CODE_SUBAGENT_MODEL: 'claude-sonnet-4-5-thinking',
+            ENABLE_EXPERIMENTAL_MCP_CLI: 'true'
+        }
+    },
+    {
+        name: 'Gemini 1M',
+        config: {
+            ANTHROPIC_AUTH_TOKEN: 'test',
+            ANTHROPIC_BASE_URL: 'http://localhost:8080',
+            ANTHROPIC_MODEL: 'gemini-3-pro-high[1m]',
+            ANTHROPIC_DEFAULT_OPUS_MODEL: 'gemini-3-pro-high[1m]',
+            ANTHROPIC_DEFAULT_SONNET_MODEL: 'gemini-3-flash[1m]',
+            ANTHROPIC_DEFAULT_HAIKU_MODEL: 'gemini-2.5-flash-lite[1m]',
+            CLAUDE_CODE_SUBAGENT_MODEL: 'gemini-3-flash[1m]',
+            ENABLE_EXPERIMENTAL_MCP_CLI: 'true'
+        }
+    }
+];
+
+/**
+ * Get the path to the presets file
+ * @returns {string} Absolute path to claude-presets.json
+ */
+export function getPresetsPath() {
+    return path.join(os.homedir(), '.config', 'antigravity-proxy', 'claude-presets.json');
+}
+
+/**
+ * Read all Claude CLI presets
+ * Creates the file with default presets if it doesn't exist.
+ * @returns {Promise<Array>} Array of preset objects
+ */
+export async function readPresets() {
+    const presetsPath = getPresetsPath();
+    try {
+        const content = await fs.readFile(presetsPath, 'utf8');
+        if (!content.trim()) return DEFAULT_PRESETS;
+        return JSON.parse(content);
+    } catch (error) {
+        if (error.code === 'ENOENT') {
+            // Create with defaults
+            try {
+                await fs.mkdir(path.dirname(presetsPath), { recursive: true });
+                await fs.writeFile(presetsPath, JSON.stringify(DEFAULT_PRESETS, null, 2), 'utf8');
+                logger.info(`[ClaudePresets] Created presets file with defaults at ${presetsPath}`);
+            } catch (writeError) {
+                logger.warn(`[ClaudePresets] Could not create presets file: ${writeError.message}`);
+            }
+            return DEFAULT_PRESETS;
+        }
+        if (error instanceof SyntaxError) {
+            logger.error(`[ClaudePresets] Invalid JSON in presets at ${presetsPath}. Returning defaults.`);
+            return DEFAULT_PRESETS;
+        }
+        logger.error(`[ClaudePresets] Failed to read presets at ${presetsPath}:`, error.message);
+        throw error;
+    }
+}
+
+/**
+ * Save a preset (add or update)
+ * @param {string} name - Preset name
+ * @param {Object} config - Environment variables to save
+ * @returns {Promise<Array>} Updated array of presets
+ */
+export async function savePreset(name, config) {
+    const presetsPath = getPresetsPath();
+    let presets = await readPresets();
+
+    const existingIndex = presets.findIndex(p => p.name === name);
+    const newPreset = { name, config: { ...config } };
+
+    if (existingIndex >= 0) {
+        presets[existingIndex] = newPreset;
+        logger.info(`[ClaudePresets] Updated preset: ${name}`);
+    } else {
+        presets.push(newPreset);
+        logger.info(`[ClaudePresets] Created preset: ${name}`);
+    }
+
+    try {
+        await fs.mkdir(path.dirname(presetsPath), { recursive: true });
+        await fs.writeFile(presetsPath, JSON.stringify(presets, null, 2), 'utf8');
+    } catch (error) {
+        logger.error(`[ClaudePresets] Failed to save preset:`, error.message);
+        throw error;
+    }
+
+    return presets;
+}
+
+/**
+ * Delete a preset by name
+ * @param {string} name - Preset name to delete
+ * @returns {Promise<Array>} Updated array of presets
+ */
+export async function deletePreset(name) {
+    const presetsPath = getPresetsPath();
+    let presets = await readPresets();
+
+    const originalLength = presets.length;
+    presets = presets.filter(p => p.name !== name);
+
+    if (presets.length === originalLength) {
+        logger.warn(`[ClaudePresets] Preset not found: ${name}`);
+        return presets;
+    }
+
+    try {
+        await fs.writeFile(presetsPath, JSON.stringify(presets, null, 2), 'utf8');
+        logger.info(`[ClaudePresets] Deleted preset: ${name}`);
+    } catch (error) {
+        logger.error(`[ClaudePresets] Failed to delete preset:`, error.message);
+        throw error;
+    }
+
+    return presets;
+}

src/webui/index.js

@@ -18,7 +18,7 @@ import { fileURLToPath } from 'url';
 import express from 'express';
 import { getPublicConfig, saveConfig, config } from '../config.js';
 import { DEFAULT_PORT, ACCOUNT_CONFIG_PATH } from '../constants.js';
-import { readClaudeConfig, updateClaudeConfig, replaceClaudeConfig, getClaudeConfigPath } from '../utils/claude-config.js';
+import { readClaudeConfig, updateClaudeConfig, replaceClaudeConfig, getClaudeConfigPath, readPresets, savePreset, deletePreset } from '../utils/claude-config.js';
 import { logger } from '../utils/logger.js';
 import { getAuthorizationUrl, completeOAuthFlow, startCallbackServer } from '../auth/oauth.js';
 import { loadAccounts, saveAccounts } from '../account-manager/storage.js';
@@ -484,6 +484,59 @@ export function mountWebUI(app, dirname, accountManager) {
         }
     });
 
+    // ==========================================
+    // Claude CLI Presets API
+    // ==========================================
+
+    /**
+     * GET /api/claude/presets - Get all saved presets
+     */
+    app.get('/api/claude/presets', async (req, res) => {
+        try {
+            const presets = await readPresets();
+            res.json({ status: 'ok', presets });
+        } catch (error) {
+            res.status(500).json({ status: 'error', error: error.message });
+        }
+    });
+
+    /**
+     * POST /api/claude/presets - Save a new preset
+     */
+    app.post('/api/claude/presets', async (req, res) => {
+        try {
+            const { name, config: presetConfig } = req.body;
+            if (!name || typeof name !== 'string' || !name.trim()) {
+                return res.status(400).json({ status: 'error', error: 'Preset name is required' });
+            }
+            if (!presetConfig || typeof presetConfig !== 'object') {
+                return res.status(400).json({ status: 'error', error: 'Config object is required' });
+            }
+
+            const presets = await savePreset(name.trim(), presetConfig);
+            res.json({ status: 'ok', presets, message: `Preset "${name}" saved` });
+        } catch (error) {
+            res.status(500).json({ status: 'error', error: error.message });
+        }
+    });
+
+    /**
+     * DELETE /api/claude/presets/:name - Delete a preset
+     */
+    app.delete('/api/claude/presets/:name', async (req, res) => {
+        try {
+            const { name } = req.params;
+            if (!name) {
+                return res.status(400).json({ status: 'error', error: 'Preset name is required' });
+            }
+
+            const presets = await deletePreset(name);
+            res.json({ status: 'ok', presets, message: `Preset "${name}" deleted` });
+        } catch (error) {
+            res.status(500).json({ status: 'error', error: error.message });
+        }
+    });
+
     /**
      * POST /api/models/config - Update model configuration (hidden/pinned/alias)
      */

tests/frontend/test-frontend-settings.cjs

@@ -313,6 +313,103 @@ const tests = [
             }
             return 'app.js loads with all required components';
         }
+    },
+
+    // ==================== PRESETS API TESTS ====================
+    {
+        name: 'Presets API GET returns presets array',
+        async run() {
+            const res = await request('/api/claude/presets');
+            if (res.status !== 200) {
+                throw new Error(`Expected 200, got ${res.status}`);
+            }
+            const data = JSON.parse(res.data);
+            if (data.status !== 'ok') {
+                throw new Error(`Expected status ok, got ${data.status}`);
+            }
+            if (!Array.isArray(data.presets)) {
+                throw new Error('presets should be an array');
+            }
+            return `Presets API returns ${data.presets.length} preset(s)`;
+        }
+    },
+    {
+        name: 'Presets API POST creates new preset',
+        async run() {
+            const testPreset = {
+                name: '__test_preset__',
+                config: {
+                    ANTHROPIC_BASE_URL: 'http://localhost:8080',
+                    ANTHROPIC_MODEL: 'test-model'
+                }
+            };
+
+            // Create preset
+            const postRes = await request('/api/claude/presets', {
+                method: 'POST',
+                body: testPreset
+            });
+            if (postRes.status !== 200) {
+                throw new Error(`POST failed with status ${postRes.status}`);
+            }
+            const postData = JSON.parse(postRes.data);
+            if (postData.status !== 'ok') {
+                throw new Error(`POST returned error: ${postData.error}`);
+            }
+
+            // Verify it exists
+            const getRes = await request('/api/claude/presets');
+            const getData = JSON.parse(getRes.data);
+            const found = getData.presets.find(p => p.name === '__test_preset__');
+            if (!found) {
+                throw new Error('Created preset not found in list');
+            }
+
+            return 'Preset created and verified';
+        }
+    },
+    {
+        name: 'Presets API DELETE removes preset',
+        async run() {
+            // Delete the test preset created above
+            const deleteRes = await request('/api/claude/presets/__test_preset__', {
+                method: 'DELETE'
+            });
+            if (deleteRes.status !== 200) {
+                throw new Error(`DELETE failed with status ${deleteRes.status}`);
+            }
+
+            // Verify it's gone
+            const getRes = await request('/api/claude/presets');
+            const getData = JSON.parse(getRes.data);
+            const found = getData.presets.find(p => p.name === '__test_preset__');
+            if (found) {
+                throw new Error('Deleted preset still exists');
+            }
+
+            return 'Preset deleted and verified';
+        }
+    },
+    {
+        name: 'Settings view has presets UI elements',
+        async run() {
+            const res = await request('/views/settings.html');
+            const html = res.data;
+
+            const presetElements = [
+                'selectedPresetName',    // Preset dropdown binding
+                'saveCurrentAsPreset',   // Save button function
+                'deleteSelectedPreset',  // Delete button function
+                'save_preset_modal',     // Save modal
+                'configPresets'          // Translation key for section title
+            ];
+
+            const missing = presetElements.filter(el => !html.includes(el));
+            if (missing.length > 0) {
+                throw new Error(`Missing preset UI elements: ${missing.join(', ')}`);
+            }
+            return 'All preset UI elements present';
+        }
     }
 ];