feat(frontend): Phase 5d-vi — settings Subscription formats tab

Ports the subscription/json partial — paths/URIs for the JSON and
Clash formats plus the four packed-JSON sub-fields: fragment, noises,
mux, and direct routing rules.

- subJsonFragment / subJsonMux / subJsonNoises / subJsonRules are each
  a JSON string on the wire; the tab exposes their fields as computed
  v-models that read+write the underlying JSON. Toggling a top-level
  switch off resets the field to "" (matches legacy semantics).
- Direct routing rules surface the IP and domain entries of the seed
  rule array as multi-select tag inputs; setting/removing tags
  edits the rules array in place rather than rebuilding it from
  scratch, so manually-added rules are preserved.
- Tab is gated on subJsonEnable || subClashEnable in the parent (only
  rendered when the user actually opted into one of those formats).

This closes Phase 5d — full settings page parity with the legacy panel
across all five tabs.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/pages/settings/SettingsPage.vue

@@ -18,6 +18,7 @@ import GeneralTab from './GeneralTab.vue';
 import SecurityTab from './SecurityTab.vue';
 import TelegramTab from './TelegramTab.vue';
 import SubscriptionGeneralTab from './SubscriptionGeneralTab.vue';
+import SubscriptionFormatsTab from './SubscriptionFormatsTab.vue';
 
 const antdThemeConfig = computed(() => ({
   algorithm: themeState.isDark ? antdTheme.darkAlgorithm : antdTheme.defaultAlgorithm,
@@ -242,7 +243,7 @@ const alertVisible = ref(true);
                         <CodeOutlined />
                         <span>Subscription (Formats)</span>
                       </template>
-                      <a-empty description="Subscription formats — coming in 5d-vi" />
+                      <SubscriptionFormatsTab :all-setting="allSetting" />
                     </a-tab-pane>
                   </a-tabs>
                 </a-col>

frontend/src/pages/settings/SubscriptionFormatsTab.vue

@@ -0,0 +1,480 @@
+<script setup>
+import { computed } from 'vue';
+import SettingListItem from '@/components/SettingListItem.vue';
+
+const props = defineProps({
+  allSetting: { type: Object, required: true },
+});
+
+// === Defaults (match legacy) ============================================
+const DEFAULT_FRAGMENT = {
+  packets: 'tlshello',
+  length: '100-200',
+  interval: '10-20',
+  maxSplit: '300-400',
+};
+const DEFAULT_NOISES = [{ type: 'rand', packet: '10-20', delay: '10-16', applyTo: 'ip' }];
+const DEFAULT_MUX = {
+  enabled: true,
+  concurrency: 8,
+  xudpConcurrency: 16,
+  xudpProxyUDP443: 'reject',
+};
+const DEFAULT_RULES = [
+  { type: 'field', outboundTag: 'direct', domain: ['geosite:category-ir'] },
+  { type: 'field', outboundTag: 'direct', ip: ['geoip:private', 'geoip:ir'] },
+];
+
+const directIPsOptions = [
+  { label: 'Private IP', value: 'geoip:private' },
+  { label: '🇮🇷 Iran', value: 'geoip:ir' },
+  { label: '🇨🇳 China', value: 'geoip:cn' },
+  { label: '🇷🇺 Russia', value: 'geoip:ru' },
+  { label: '🇻🇳 Vietnam', value: 'geoip:vn' },
+  { label: '🇪🇸 Spain', value: 'geoip:es' },
+  { label: '🇮🇩 Indonesia', value: 'geoip:id' },
+  { label: '🇺🇦 Ukraine', value: 'geoip:ua' },
+  { label: '🇹🇷 Türkiye', value: 'geoip:tr' },
+  { label: '🇧🇷 Brazil', value: 'geoip:br' },
+];
+const directDomainsOptions = [
+  { label: 'Private DNS', value: 'geosite:private' },
+  { label: '🇮🇷 Iran', value: 'geosite:category-ir' },
+  { label: '🇨🇳 China', value: 'geosite:cn' },
+  { label: '🇷🇺 Russia', value: 'geosite:category-ru' },
+  { label: 'Apple', value: 'geosite:apple' },
+  { label: 'Meta', value: 'geosite:meta' },
+  { label: 'Google', value: 'geosite:google' },
+];
+
+// === Path helpers (json + clash share the same shape) ===================
+function makePath(field) {
+  return computed({
+    get: () => props.allSetting[field],
+    set: (v) => {
+      props.allSetting[field] = String(v ?? '').replace(/[:*]/g, '');
+    },
+  });
+}
+function normalizePath(field) {
+  let p = props.allSetting[field] || '/';
+  if (!p.startsWith('/')) p = '/' + p;
+  if (!p.endsWith('/')) p += '/';
+  p = p.replace(/\/+/g, '/');
+  props.allSetting[field] = p;
+}
+const subJsonPath = makePath('subJsonPath');
+const subClashPath = makePath('subClashPath');
+
+// === Fragment ===========================================================
+// `subJsonFragment` is a JSON-encoded object when enabled, "" when off.
+function readJson(field, fallback) {
+  try {
+    const raw = props.allSetting[field];
+    if (!raw) return fallback;
+    return JSON.parse(raw);
+  } catch (_e) {
+    return fallback;
+  }
+}
+function writeJson(field, value) {
+  props.allSetting[field] = JSON.stringify(value);
+}
+
+const fragment = computed({
+  get: () => props.allSetting.subJsonFragment !== '',
+  set: (v) => {
+    props.allSetting.subJsonFragment = v ? JSON.stringify(DEFAULT_FRAGMENT) : '';
+  },
+});
+function makeFragmentField(key) {
+  return computed({
+    get: () => (fragment.value ? readJson('subJsonFragment', DEFAULT_FRAGMENT)[key] : ''),
+    set: (v) => {
+      if (v === '') return;
+      const f = readJson('subJsonFragment', { ...DEFAULT_FRAGMENT });
+      f[key] = v;
+      writeJson('subJsonFragment', f);
+    },
+  });
+}
+const fragmentPackets = makeFragmentField('packets');
+const fragmentLength = makeFragmentField('length');
+const fragmentInterval = makeFragmentField('interval');
+const fragmentMaxSplit = makeFragmentField('maxSplit');
+
+// === Noises =============================================================
+const noises = computed({
+  get: () => props.allSetting.subJsonNoises !== '',
+  set: (v) => {
+    props.allSetting.subJsonNoises = v ? JSON.stringify(DEFAULT_NOISES) : '';
+  },
+});
+const noisesArray = computed({
+  get: () => (noises.value ? readJson('subJsonNoises', DEFAULT_NOISES) : []),
+  set: (value) => { if (noises.value) writeJson('subJsonNoises', value); },
+});
+function addNoise() {
+  noisesArray.value = [...noisesArray.value, { ...DEFAULT_NOISES[0] }];
+}
+function removeNoise(index) {
+  const next = [...noisesArray.value];
+  next.splice(index, 1);
+  noisesArray.value = next;
+}
+function updateNoiseField(index, field, value) {
+  const next = [...noisesArray.value];
+  next[index] = { ...next[index], [field]: value };
+  noisesArray.value = next;
+}
+
+// === Mux ================================================================
+const enableMux = computed({
+  get: () => props.allSetting.subJsonMux !== '',
+  set: (v) => {
+    props.allSetting.subJsonMux = v ? JSON.stringify(DEFAULT_MUX) : '';
+  },
+});
+function makeMuxField(key, fallback) {
+  return computed({
+    get: () => (enableMux.value ? readJson('subJsonMux', DEFAULT_MUX)[key] : fallback),
+    set: (v) => {
+      const m = readJson('subJsonMux', { ...DEFAULT_MUX });
+      m[key] = v;
+      writeJson('subJsonMux', m);
+    },
+  });
+}
+const muxConcurrency = makeMuxField('concurrency', -1);
+const muxXudpConcurrency = makeMuxField('xudpConcurrency', -1);
+const muxXudpProxyUDP443 = makeMuxField('xudpProxyUDP443', 'reject');
+
+// === Direct routing rules ==============================================
+// `subJsonRules` is a JSON array of xray routing rules. We surface the
+// IP and domain fields of the two seed rules as multi-select tags.
+const enableDirect = computed({
+  get: () => props.allSetting.subJsonRules !== '',
+  set: (v) => {
+    props.allSetting.subJsonRules = v ? JSON.stringify(DEFAULT_RULES) : '';
+  },
+});
+function ruleArray() {
+  if (!enableDirect.value) return null;
+  const rules = readJson('subJsonRules', null);
+  return Array.isArray(rules) ? rules : null;
+}
+const directIPs = computed({
+  get: () => {
+    const rules = ruleArray();
+    if (!rules) return [];
+    const ipRule = rules.find((r) => r.ip);
+    return ipRule?.ip ?? [];
+  },
+  set: (value) => {
+    let rules = ruleArray();
+    if (!rules) return;
+    if (value.length === 0) {
+      rules = rules.filter((r) => !r.ip);
+    } else {
+      let idx = rules.findIndex((r) => r.ip);
+      if (idx === -1) idx = rules.push({ ...DEFAULT_RULES[1] }) - 1;
+      rules[idx].ip = [...value];
+    }
+    writeJson('subJsonRules', rules);
+  },
+});
+const directDomains = computed({
+  get: () => {
+    const rules = ruleArray();
+    if (!rules) return [];
+    const dRule = rules.find((r) => r.domain);
+    return dRule?.domain ?? [];
+  },
+  set: (value) => {
+    let rules = ruleArray();
+    if (!rules) return;
+    if (value.length === 0) {
+      rules = rules.filter((r) => !r.domain);
+    } else {
+      let idx = rules.findIndex((r) => r.domain);
+      if (idx === -1) idx = rules.push({ ...DEFAULT_RULES[0] }) - 1;
+      rules[idx].domain = [...value];
+    }
+    writeJson('subJsonRules', rules);
+  },
+});
+</script>
+
+<template>
+  <a-collapse default-active-key="1">
+    <a-collapse-panel key="1" header="General">
+      <SettingListItem v-if="allSetting.subJsonEnable" paddings="small">
+        <template #title>JSON path</template>
+        <template #description>URL prefix for JSON subscription endpoints.</template>
+        <template #control>
+          <a-input
+            v-model:value="subJsonPath"
+            type="text"
+            placeholder="/json/"
+            @blur="normalizePath('subJsonPath')"
+          />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem v-if="allSetting.subJsonEnable" paddings="small">
+        <template #title>JSON URI override</template>
+        <template #description>Full URL returned to JSON-format clients.</template>
+        <template #control>
+          <a-input
+            v-model:value="allSetting.subJsonURI"
+            type="text"
+            placeholder="(http|https)://domain[:port]/path/"
+          />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem v-if="allSetting.subClashEnable" paddings="small">
+        <template #title>Clash path</template>
+        <template #description>URL prefix for Clash/Mihomo subscription endpoints.</template>
+        <template #control>
+          <a-input
+            v-model:value="subClashPath"
+            type="text"
+            placeholder="/clash/"
+            @blur="normalizePath('subClashPath')"
+          />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem v-if="allSetting.subClashEnable" paddings="small">
+        <template #title>Clash URI override</template>
+        <template #description>Full URL returned to Clash-format clients.</template>
+        <template #control>
+          <a-input
+            v-model:value="allSetting.subClashURI"
+            type="text"
+            placeholder="(http|https)://domain[:port]/path/"
+          />
+        </template>
+      </SettingListItem>
+    </a-collapse-panel>
+
+    <a-collapse-panel key="2" header="Fragment">
+      <SettingListItem paddings="small">
+        <template #title>Enable fragmentation</template>
+        <template #description>Apply TLS-hello fragmentation to outbound connections.</template>
+        <template #control>
+          <a-switch v-model:checked="fragment" />
+        </template>
+      </SettingListItem>
+
+      <a-list-item v-if="fragment" class="nested-block">
+        <a-collapse>
+          <a-collapse-panel header="Fragment settings">
+            <SettingListItem paddings="small">
+              <template #title>Packets</template>
+              <template #control>
+                <a-input v-model:value="fragmentPackets" placeholder="1-1 | 1-3 | tlshello | …" />
+              </template>
+            </SettingListItem>
+            <SettingListItem paddings="small">
+              <template #title>Length</template>
+              <template #control>
+                <a-input v-model:value="fragmentLength" placeholder="100-200" />
+              </template>
+            </SettingListItem>
+            <SettingListItem paddings="small">
+              <template #title>Interval</template>
+              <template #control>
+                <a-input v-model:value="fragmentInterval" placeholder="10-20" />
+              </template>
+            </SettingListItem>
+            <SettingListItem paddings="small">
+              <template #title>Max split</template>
+              <template #control>
+                <a-input v-model:value="fragmentMaxSplit" placeholder="300-400" />
+              </template>
+            </SettingListItem>
+          </a-collapse-panel>
+        </a-collapse>
+      </a-list-item>
+    </a-collapse-panel>
+
+    <a-collapse-panel key="3" header="Noises">
+      <SettingListItem paddings="small">
+        <template #title>Enable noises</template>
+        <template #description>Inject noise packets to obfuscate traffic patterns.</template>
+        <template #control>
+          <a-switch v-model:checked="noises" />
+        </template>
+      </SettingListItem>
+
+      <a-list-item v-if="noises" class="nested-block">
+        <a-collapse>
+          <a-collapse-panel
+            v-for="(noise, index) in noisesArray"
+            :key="index"
+            :header="`Noise №${index + 1}`"
+          >
+            <SettingListItem paddings="small">
+              <template #title>Type</template>
+              <template #control>
+                <a-select
+                  :value="noise.type"
+                  :style="{ width: '100%' }"
+                  @change="(v) => updateNoiseField(index, 'type', v)"
+                >
+                  <a-select-option v-for="p in ['rand', 'base64', 'str', 'hex']" :key="p" :value="p">
+                    {{ p }}
+                  </a-select-option>
+                </a-select>
+              </template>
+            </SettingListItem>
+            <SettingListItem paddings="small">
+              <template #title>Packet</template>
+              <template #control>
+                <a-input
+                  :value="noise.packet"
+                  placeholder="5-10"
+                  @input="(e) => updateNoiseField(index, 'packet', e.target.value)"
+                />
+              </template>
+            </SettingListItem>
+            <SettingListItem paddings="small">
+              <template #title>Delay (ms)</template>
+              <template #control>
+                <a-input
+                  :value="noise.delay"
+                  placeholder="10-20"
+                  @input="(e) => updateNoiseField(index, 'delay', e.target.value)"
+                />
+              </template>
+            </SettingListItem>
+            <SettingListItem paddings="small">
+              <template #title>Apply to</template>
+              <template #control>
+                <a-select
+                  :value="noise.applyTo"
+                  :style="{ width: '100%' }"
+                  @change="(v) => updateNoiseField(index, 'applyTo', v)"
+                >
+                  <a-select-option v-for="p in ['ip', 'ipv4', 'ipv6']" :key="p" :value="p">
+                    {{ p }}
+                  </a-select-option>
+                </a-select>
+              </template>
+            </SettingListItem>
+
+            <a-space direction="horizontal" :style="{ padding: '10px 20px' }">
+              <a-button v-if="noisesArray.length > 1" type="primary" danger @click="removeNoise(index)">
+                Remove
+              </a-button>
+            </a-space>
+          </a-collapse-panel>
+        </a-collapse>
+
+        <a-button type="primary" :style="{ marginTop: '10px' }" @click="addNoise">Add noise</a-button>
+      </a-list-item>
+    </a-collapse-panel>
+
+    <a-collapse-panel key="4" header="Mux">
+      <SettingListItem paddings="small">
+        <template #title>Enable mux</template>
+        <template #description>Multiplex multiple streams over a single connection.</template>
+        <template #control>
+          <a-switch v-model:checked="enableMux" />
+        </template>
+      </SettingListItem>
+
+      <a-list-item v-if="enableMux" class="nested-block">
+        <a-collapse>
+          <a-collapse-panel header="Mux settings">
+            <SettingListItem paddings="small">
+              <template #title>Concurrency</template>
+              <template #control>
+                <a-input-number
+                  v-model:value="muxConcurrency"
+                  :min="-1"
+                  :max="1024"
+                  :style="{ width: '100%' }"
+                />
+              </template>
+            </SettingListItem>
+            <SettingListItem paddings="small">
+              <template #title>xudp concurrency</template>
+              <template #control>
+                <a-input-number
+                  v-model:value="muxXudpConcurrency"
+                  :min="-1"
+                  :max="1024"
+                  :style="{ width: '100%' }"
+                />
+              </template>
+            </SettingListItem>
+            <SettingListItem paddings="small">
+              <template #title>xudp UDP 443</template>
+              <template #control>
+                <a-select v-model:value="muxXudpProxyUDP443" :style="{ width: '100%' }">
+                  <a-select-option v-for="p in ['reject', 'allow', 'skip']" :key="p" :value="p">
+                    {{ p }}
+                  </a-select-option>
+                </a-select>
+              </template>
+            </SettingListItem>
+          </a-collapse-panel>
+        </a-collapse>
+      </a-list-item>
+    </a-collapse-panel>
+
+    <a-collapse-panel key="5" header="Direct routing">
+      <SettingListItem paddings="small">
+        <template #title>Enable direct rules</template>
+        <template #description>Bypass the proxy for matched IPs and domains.</template>
+        <template #control>
+          <a-switch v-model:checked="enableDirect" />
+        </template>
+      </SettingListItem>
+
+      <a-list-item v-if="enableDirect" class="nested-block">
+        <a-collapse>
+          <a-collapse-panel header="Direct">
+            <SettingListItem paddings="small">
+              <template #title>Direct IPs</template>
+              <template #control>
+                <a-select
+                  v-model:value="directIPs"
+                  mode="tags"
+                  :style="{ width: '100%' }"
+                >
+                  <a-select-option v-for="p in directIPsOptions" :key="p.value" :value="p.value" :label="p.label">
+                    {{ p.label }}
+                  </a-select-option>
+                </a-select>
+              </template>
+            </SettingListItem>
+            <SettingListItem paddings="small">
+              <template #title>Direct domains</template>
+              <template #control>
+                <a-select
+                  v-model:value="directDomains"
+                  mode="tags"
+                  :style="{ width: '100%' }"
+                >
+                  <a-select-option v-for="p in directDomainsOptions" :key="p.value" :value="p.value" :label="p.label">
+                    {{ p.label }}
+                  </a-select-option>
+                </a-select>
+              </template>
+            </SettingListItem>
+          </a-collapse-panel>
+        </a-collapse>
+      </a-list-item>
+    </a-collapse-panel>
+  </a-collapse>
+</template>
+
+<style scoped>
+.nested-block {
+  padding: 10px 20px;
+}
+</style>