feat(frontend): Phase 5d-v — settings Subscription general tab

Ports the subscription/general partial — four collapse panels covering
the master enable switches, presentation/template fields, certs, and
update interval.

- Sub path goes through a strip-on-input + normalize-on-blur computed:
  legacy stripped `:` and `*` and ensured the value starts and ends
  with a single `/` — same here.
- Both `subEnableRouting` and the announce/profile/title/support URLs
  are bound directly on AllSetting.
- The "Subscription URI override" placeholder mirrors the legacy
  pattern for the manual full-URL form.

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

frontend/src/pages/settings/SettingsPage.vue

@@ -17,6 +17,7 @@ import { useAllSetting } from './useAllSetting.js';
 import GeneralTab from './GeneralTab.vue';
 import SecurityTab from './SecurityTab.vue';
 import TelegramTab from './TelegramTab.vue';
+import SubscriptionGeneralTab from './SubscriptionGeneralTab.vue';
 
 const antdThemeConfig = computed(() => ({
   algorithm: themeState.isDark ? antdTheme.darkAlgorithm : antdTheme.defaultAlgorithm,
@@ -230,7 +231,7 @@ const alertVisible = ref(true);
                         <CloudServerOutlined />
                         <span>Subscription</span>
                       </template>
-                      <a-empty description="Subscription — coming in 5d-v" />
+                      <SubscriptionGeneralTab :all-setting="allSetting" />
                     </a-tab-pane>
                     <a-tab-pane
                       v-if="allSetting.subJsonEnable || allSetting.subClashEnable"

frontend/src/pages/settings/SubscriptionGeneralTab.vue

@@ -0,0 +1,215 @@
+<script setup>
+import { computed } from 'vue';
+import SettingListItem from '@/components/SettingListItem.vue';
+
+const props = defineProps({
+  allSetting: { type: Object, required: true },
+});
+
+// Sub path is constrained: no `:` or `*`, must start and end with `/`,
+// and no double slashes. Strip on input, normalize on blur — same
+// behavior as the legacy template.
+const subPath = computed({
+  get: () => props.allSetting.subPath,
+  set: (v) => {
+    props.allSetting.subPath = String(v ?? '').replace(/[:*]/g, '');
+  },
+});
+
+function normalizeSubPath() {
+  let p = props.allSetting.subPath || '/';
+  if (!p.startsWith('/')) p = '/' + p;
+  if (!p.endsWith('/')) p += '/';
+  p = p.replace(/\/+/g, '/');
+  props.allSetting.subPath = p;
+}
+</script>
+
+<template>
+  <a-collapse default-active-key="1">
+    <a-collapse-panel key="1" header="General">
+      <SettingListItem paddings="small">
+        <template #title>Subscription enable</template>
+        <template #description>Master switch for /sub endpoints.</template>
+        <template #control>
+          <a-switch v-model:checked="allSetting.subEnable" />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>JSON subscription</template>
+        <template #description>Expose /json subscription endpoints alongside /sub.</template>
+        <template #control>
+          <a-switch v-model:checked="allSetting.subJsonEnable" />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>Clash / Mihomo subscription</template>
+        <template #description>Enable direct Clash and Mihomo YAML subscriptions.</template>
+        <template #control>
+          <a-switch v-model:checked="allSetting.subClashEnable" />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>Subscription listen IP</template>
+        <template #description>The IP the subscription server binds to. Leave empty to share the panel listener.</template>
+        <template #control>
+          <a-input v-model:value="allSetting.subListen" type="text" />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>Subscription domain</template>
+        <template #description>Domain returned in subscription URLs.</template>
+        <template #control>
+          <a-input v-model:value="allSetting.subDomain" type="text" />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>Subscription port</template>
+        <template #description>Restart required after changing.</template>
+        <template #control>
+          <a-input-number
+            v-model:value="allSetting.subPort"
+            :min="1"
+            :max="65535"
+            :style="{ width: '100%' }"
+          />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>Subscription path</template>
+        <template #description>URL prefix for subscription endpoints (must start and end with /).</template>
+        <template #control>
+          <a-input
+            v-model:value="subPath"
+            type="text"
+            placeholder="/sub/"
+            @blur="normalizeSubPath"
+          />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>Subscription URI override</template>
+        <template #description>Full URL returned to clients — overrides scheme/domain/port/path when set.</template>
+        <template #control>
+          <a-input
+            v-model:value="allSetting.subURI"
+            type="text"
+            placeholder="(http|https)://domain[:port]/path/"
+          />
+        </template>
+      </SettingListItem>
+    </a-collapse-panel>
+
+    <a-collapse-panel key="2" header="Information">
+      <SettingListItem paddings="small">
+        <template #title>Encrypt subscription</template>
+        <template #description>Encrypt subscription content; clients need the matching key.</template>
+        <template #control>
+          <a-switch v-model:checked="allSetting.subEncrypt" />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>Show usage info</template>
+        <template #description>Include used/total traffic and expiry in the subscription headers.</template>
+        <template #control>
+          <a-switch v-model:checked="allSetting.subShowInfo" />
+        </template>
+      </SettingListItem>
+
+      <a-divider>Basic template</a-divider>
+
+      <SettingListItem paddings="small">
+        <template #title>Title</template>
+        <template #description>Subscription title shown in clients.</template>
+        <template #control>
+          <a-input v-model:value="allSetting.subTitle" type="text" />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>Support URL</template>
+        <template #description>Link surfaced to clients for support.</template>
+        <template #control>
+          <a-input v-model:value="allSetting.subSupportUrl" type="text" placeholder="https://example.com" />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>Profile URL</template>
+        <template #description>Profile/announcement URL surfaced to clients.</template>
+        <template #control>
+          <a-input v-model:value="allSetting.subProfileUrl" type="text" placeholder="https://example.com" />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>Announce</template>
+        <template #description>Free-form announcement appended to the subscription header.</template>
+        <template #control>
+          <a-textarea v-model:value="allSetting.subAnnounce" />
+        </template>
+      </SettingListItem>
+
+      <a-divider>Advanced template (Happ)</a-divider>
+
+      <SettingListItem paddings="small">
+        <template #title>Enable Happ routing</template>
+        <template #description>Embed Happ routing rules in the subscription.</template>
+        <template #control>
+          <a-switch v-model:checked="allSetting.subEnableRouting" />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>Routing rules</template>
+        <template #description>One happ:// directive per line.</template>
+        <template #control>
+          <a-textarea
+            v-model:value="allSetting.subRoutingRules"
+            placeholder="happ://routing/add/..."
+          />
+        </template>
+      </SettingListItem>
+    </a-collapse-panel>
+
+    <a-collapse-panel key="3" header="Certificates">
+      <SettingListItem paddings="small">
+        <template #title>Subscription cert path</template>
+        <template #description>Absolute path to the subscription server's TLS certificate.</template>
+        <template #control>
+          <a-input v-model:value="allSetting.subCertFile" type="text" />
+        </template>
+      </SettingListItem>
+
+      <SettingListItem paddings="small">
+        <template #title>Subscription key path</template>
+        <template #description>Absolute path to the subscription server's private key.</template>
+        <template #control>
+          <a-input v-model:value="allSetting.subKeyFile" type="text" />
+        </template>
+      </SettingListItem>
+    </a-collapse-panel>
+
+    <a-collapse-panel key="4" header="Update interval">
+      <SettingListItem paddings="small">
+        <template #title>Update hours</template>
+        <template #description>Hours clients should wait before re-fetching the subscription.</template>
+        <template #control>
+          <a-input-number
+            v-model:value="allSetting.subUpdates"
+            :min="1"
+            :style="{ width: '100%' }"
+          />
+        </template>
+      </SettingListItem>
+    </a-collapse-panel>
+  </a-collapse>
+</template>