diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index a563e46..2740ea9 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -63,3 +63,44 @@ jobs:
           username: ${{ secrets.VPS2_USER }}
           key: ${{ secrets.VPS2_SSH_KEY }}
           script: bash /opt/cleanup-miniapp.sh
+
+  # Edge functions live in a Supabase volume shared with other projects, so they
+  # are written through the ownership gate on the host rather than copied in
+  # directly. The gate refuses any name this project does not own, which is what
+  # stops a repeat of the 2026-06-28 incident where another project's deploy
+  # silently replaced telegram-auth and broke sign-in for a month.
+  deploy-functions:
+    name: Deploy edge functions
+    needs: deploy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Package functions
+        run: tar czf functions.tgz -C supabase functions
+
+      - name: Copy to staging on VPS
+        uses: appleboy/scp-action@v1.0.0
+        with:
+          host: ${{ secrets.VPS2_HOST }}
+          username: ${{ secrets.VPS2_USER }}
+          key: ${{ secrets.VPS2_SSH_KEY }}
+          source: 'functions.tgz'
+          target: '/opt/miniapp-deploy-staging'
+
+      - name: Deploy through ownership gate
+        uses: appleboy/ssh-action@v1.0.0
+        with:
+          host: ${{ secrets.VPS2_HOST }}
+          username: ${{ secrets.VPS2_USER }}
+          key: ${{ secrets.VPS2_SSH_KEY }}
+          script: |
+            set -e
+            BASE=/opt/miniapp-deploy-staging
+            trap 'rm -rf "$BASE"' EXIT
+            rm -rf "$BASE/functions"
+            tar xzf "$BASE/functions.tgz" -C "$BASE"
+            supabase-deploy-functions \
+              --project pezkuwi-telegram-miniapp \
+              --src "$BASE/functions" \
+              --restart
diff --git a/package.json b/package.json
index 73458c5..6fd93af 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pezkuwi-telegram-miniapp",
-  "version": "1.0.242",
+  "version": "1.0.243",
   "type": "module",
   "description": "Pezkuwichain Telegram Mini App - Forum, Announcements, Rewards",
   "author": "Pezkuwichain Team",
diff --git a/src/lib/supabase.ts b/src/lib/supabase.ts
index ab4e436..72091c8 100644
--- a/src/lib/supabase.ts
+++ b/src/lib/supabase.ts
@@ -11,7 +11,10 @@ export async function signInWithTelegram(initData: string) {
     throw new Error('No Telegram initData provided');
   }
 
-  const { data, error } = await supabase.functions.invoke('telegram-auth', {
+  // Namespaced: the shared Supabase instance also hosts pwap-web, whose own
+  // login-widget handler owns the bare 'telegram-auth' name. See
+  // /opt/supabase-self-hosted/functions-registry.json on the host.
+  const { data, error } = await supabase.functions.invoke('tgm-telegram-auth', {
     body: { initData },
   });
 
diff --git a/src/version.json b/src/version.json
index 89e672c..be8ebc1 100644
--- a/src/version.json
+++ b/src/version.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.0.242",
+  "version": "1.0.243",
   "buildTime": "2026-07-21T14:51:23.002Z",
   "buildNumber": 1784645483003
 }
diff --git a/supabase/functions/telegram-bot/index.ts b/supabase/functions/telegram-bot/index.ts
index 1033a87..1586e33 100644
--- a/supabase/functions/telegram-bot/index.ts
+++ b/supabase/functions/telegram-bot/index.ts
@@ -563,6 +563,12 @@ async function sendDksWelcome(token: string, chatId: number) {
           web_app: { url: MINI_APP_URLS.dks },
         },
       ],
+      [
+        {
+          text: '💱 Buy/Sell Crypto — PEX.network',
+          url: 'https://pex.network',
+        },
+      ],
       [
         {
           text: '📢 Join Channel / Kanalê Tev Bibin',
diff --git a/supabase/functions/process-withdraw/index.ts b/supabase/functions/tgm-process-withdraw/index.ts
similarity index 100%
rename from supabase/functions/process-withdraw/index.ts
rename to supabase/functions/tgm-process-withdraw/index.ts
diff --git a/supabase/functions/telegram-auth/index.ts b/supabase/functions/tgm-telegram-auth/index.ts
similarity index 100%
rename from supabase/functions/telegram-auth/index.ts
rename to supabase/functions/tgm-telegram-auth/index.ts
diff --git a/supabase/migrations/20260730_ai_chat_log.sql b/supabase/migrations/20260730_ai_chat_log.sql
new file mode 100644
index 0000000..025bb71
--- /dev/null
+++ b/supabase/migrations/20260730_ai_chat_log.sql
@@ -0,0 +1,28 @@
+-- Rate-limit ledger for the public `ask` edge function (news.pex.mom assistant).
+--
+-- `ask` is unauthenticated and sends `Access-Control-Allow-Origin: *`, so this
+-- table is its only throttle: 8 requests per IP per minute, 120 per day. The
+-- limiter counts rows here and fails open when the count cannot be read, which
+-- means shipping `ask` without this table would leave a public endpoint calling
+-- paid model APIs with no limit at all.
+
+create table if not exists public.ai_chat_log (
+  id         bigserial primary key,
+  ip         text        not null,
+  created_at timestamptz not null default now()
+);
+
+-- The limiter always filters on both columns together (ip = ? and created_at >= ?).
+create index if not exists ai_chat_log_ip_created_at_idx
+  on public.ai_chat_log (ip, created_at desc);
+
+-- Only the service role touches this table; the function reaches it through
+-- PostgREST with the service key, which bypasses RLS. Enabling RLS without any
+-- policy therefore keeps the behaviour intact while denying anon and
+-- authenticated clients, who have no reason to read a table of IP addresses.
+alter table public.ai_chat_log enable row level security;
+
+revoke all on public.ai_chat_log from anon, authenticated;
+
+comment on table public.ai_chat_log is
+  'Rate-limit ledger for the public ask endpoint. Holds IP addresses; prune rows older than the 24h window the limiter uses.';