Move alerts to their own page, add direct message alerts

src/app/components/ChatMenu.svelte

@@ -1,11 +1,18 @@
 <script lang="ts">
+  import {waitForThunkCompletion} from "@welshman/app"
   import ChatSquare from "@assets/icons/chat-square.svg?dataurl"
   import Check from "@assets/icons/check.svg?dataurl"
+  import Bell from "@assets/icons/bell.svg?dataurl"
+  import BellOff from "@assets/icons/bell-off.svg?dataurl"
   import Icon from "@lib/components/Icon.svelte"
   import Button from "@lib/components/Button.svelte"
+  import Spinner from "@lib/components/Spinner.svelte"
   import ChatStart from "@app/components/ChatStart.svelte"
   import {setChecked} from "@app/util/notifications"
   import {pushModal} from "@app/util/modal"
+  import {pushToast} from "@app/util/toast"
+  import {dmAlert, userInboxRelays} from "@app/core/state"
+  import {deleteAlert, createDmAlert} from "@app/core/commands"
 
   const startChat = () => pushModal(ChatStart, {}, {replaceState: true})
 
@@ -13,6 +20,40 @@
     setChecked("/chat/*")
     history.back()
   }
+
+  const enableAlerts = async () => {
+    if ($userInboxRelays.length === 0) {
+      return pushToast({
+        theme: "error",
+        message: "Please set up your messaging relays before enabling alerts.",
+      })
+    }
+
+    enablingAlert = true
+
+    try {
+      const {error} = await createDmAlert()
+
+      if (error) {
+        return pushToast({theme: "error", message: error})
+      }
+    } finally {
+      enablingAlert = false
+    }
+  }
+
+  const disableAlerts = async () => {
+    disablingAlert = true
+
+    try {
+      await waitForThunkCompletion(deleteAlert($dmAlert!))
+    } finally {
+      disablingAlert = false
+    }
+  }
+
+  let enablingAlert = $state(false)
+  let disablingAlert = $state(false)
 </script>
 
 <div class="col-2">
@@ -24,4 +65,19 @@
     <Icon size={5} icon={Check} />
     Mark all read
   </Button>
+  {#if (!enablingAlert && $dmAlert) || disablingAlert}
+    <Button class="btn btn-neutral" onclick={disableAlerts} disabled={disablingAlert}>
+      {#if !disablingAlert}
+        <Icon size={4} icon={BellOff} />
+      {/if}
+      <Spinner loading={disablingAlert}>Disable alerts</Spinner>
+    </Button>
+  {:else}
+    <Button class="btn btn-neutral" onclick={enableAlerts} disabled={enablingAlert}>
+      {#if !enablingAlert}
+        <Icon size={4} icon={Bell} />
+      {/if}
+      <Spinner loading={enablingAlert}>Enable alerts</Spinner>
+    </Button>
+  {/if}
 </div>