nuxt-app/app/components/agent/AgentSystemPromptModal.vue

<script setup lang="ts">
const props = defineProps<{
  show: boolean;
  systemPrompt: string;
  isCustom: boolean;
}>();

const emit = defineEmits<{
  close: [];
  save: [systemPrompt: string | null];
}>();

const editingText = ref("");
const saving = ref(false);

watch(
  () => props.show,
  (val) => {
    if (val) {
      editingText.value = props.systemPrompt;
    }
  },
);

async function handleSave() {
  saving.value = true;
  try {
    const trimmed = editingText.value.trim();
    emit("save", trimmed.length > 0 ? trimmed.slice(0, 5000) : null);
  } finally {
    saving.value = false;
  }
}

function handleReset() {
  editingText.value = "";
  emit("save", null);
}
</script>

<template>
  <Teleport to="body">
    <div v-if="show" class="agent-prompt-overlay" @click="emit('close')">
      <div class="agent-prompt-modal" @click.stop>
        <div class="modal-header">
          <h3 class="modal-title">系统提示词</h3>
          <button class="modal-close" @click="emit('close')">
            <Icon name="lucide:x" />
          </button>
        </div>
        <div class="modal-body">
          <div v-if="isCustom" class="custom-badge">
            <Icon name="lucide:check-circle" />
            <span>当前使用会话自定义提示词</span>
          </div>
          <div v-else class="default-badge">
            <Icon name="lucide:info" />
            <span>当前使用 Agent 默认提示词，编辑后将覆盖默认值</span>
          </div>
          <textarea
            v-model="editingText"
            class="prompt-textarea"
            placeholder="输入系统提示词，留空则使用 Agent 默认"
            maxlength="5000"
          />
          <div class="char-count">{{ editingText.length }} / 5000</div>
        </div>
        <div class="modal-footer">
          <button class="btn-reset" :disabled="saving" @click="handleReset">
            重置为默认
          </button>
          <button class="btn-save" :disabled="saving" @click="handleSave">
            {{ saving ? "保存中..." : "保存" }}
          </button>
        </div>
      </div>
    </div>
  </Teleport>
</template>

<style scoped>
.agent-prompt-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 20, 19, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.agent-prompt-modal {
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-hairline);
}

.modal-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 400;
  color: var(--color-ink);
  margin: 0;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  border-radius: 8px;
  cursor: pointer;
  color: var(--color-muted);
  font-size: 18px;
  transition: all 0.15s;
}

.modal-close:hover {
  background: var(--color-surface-soft);
  color: var(--color-ink);
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.custom-badge,
.default-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
}

.custom-badge {
  background: var(--color-surface-soft);
  color: var(--color-primary);
}

.default-badge {
  background: var(--color-surface-soft);
  color: var(--color-muted);
}

.prompt-textarea {
  width: 100%;
  min-height: 200px;
  padding: 12px;
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-body);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: 8px;
  resize: vertical;
  outline: none;
  transition: border-color 0.15s;
}

.prompt-textarea:focus {
  border-color: var(--color-primary);
}

.char-count {
  text-align: right;
  font-size: 12px;
  color: var(--color-muted);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--color-hairline);
}

.btn-reset,
.btn-save {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
  border: 1px solid var(--color-hairline);
}

.btn-reset {
  background: var(--color-surface-soft);
  color: var(--color-muted);
}

.btn-reset:hover {
  border-color: var(--color-primary);
  color: var(--color-ink);
}

.btn-save {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-on-primary);
}

.btn-save:hover {
  opacity: 0.9;
}

.btn-reset:disabled,
.btn-save:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
</style>