feat(chat): integrate chat project into monorepo with full app structure

- Restructure chat as apps/mobile, apps/web, apps/landing, backend
- Add NestJS backend for secure Azure OpenAI API calls
- Remove exposed API key from mobile app (security fix)
- Add shared chat-types package
- Create SvelteKit web app scaffold
- Create Astro landing page scaffold
- Update pnpm workspace configuration
- Add project-level CLAUDE.md documentation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

chat/apps/mobile/scripts/spaces/create_spaces_triggers.sql

@@ -0,0 +1,97 @@
+-- Create updated_at trigger for spaces
+CREATE OR REPLACE FUNCTION set_updated_at()
+RETURNS TRIGGER AS $$
+BEGIN
+  NEW.updated_at = NOW();
+  RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Apply updated_at trigger to spaces table if it doesn't exist
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_trigger WHERE tgname = 'set_spaces_updated_at'
+  ) THEN
+    CREATE TRIGGER set_spaces_updated_at
+    BEFORE UPDATE ON public.spaces
+    FOR EACH ROW
+    EXECUTE FUNCTION set_updated_at();
+  END IF;
+END
+$$;
+
+-- Apply updated_at trigger to space_members table if it doesn't exist
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_trigger WHERE tgname = 'set_space_members_updated_at'
+  ) THEN
+    CREATE TRIGGER set_space_members_updated_at
+    BEFORE UPDATE ON public.space_members
+    FOR EACH ROW
+    EXECUTE FUNCTION set_updated_at();
+  END IF;
+END
+$$;
+
+-- Automatically add space owner as member with owner role
+CREATE OR REPLACE FUNCTION add_owner_to_space_members()
+RETURNS TRIGGER AS $$
+BEGIN
+  INSERT INTO public.space_members (
+    space_id, 
+    user_id, 
+    role, 
+    invitation_status,
+    joined_at
+  )
+  VALUES (
+    NEW.id, 
+    NEW.owner_id, 
+    'owner', 
+    'accepted',
+    NOW()
+  );
+  RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Apply owner trigger to spaces table if it doesn't exist
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_trigger WHERE tgname = 'add_owner_to_space_members_trigger'
+  ) THEN
+    CREATE TRIGGER add_owner_to_space_members_trigger
+    AFTER INSERT ON public.spaces
+    FOR EACH ROW
+    EXECUTE FUNCTION add_owner_to_space_members();
+  END IF;
+END
+$$;
+
+-- Update space modification timestamp when members are added/changed
+CREATE OR REPLACE FUNCTION update_space_timestamp_on_member_change()
+RETURNS TRIGGER AS $$
+BEGIN
+  UPDATE public.spaces
+  SET updated_at = NOW()
+  WHERE id = NEW.space_id;
+  RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Apply space timestamp update trigger if it doesn't exist
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_trigger WHERE tgname = 'update_space_timestamp_trigger'
+  ) THEN
+    CREATE TRIGGER update_space_timestamp_trigger
+    AFTER INSERT OR UPDATE ON public.space_members
+    FOR EACH ROW
+    EXECUTE FUNCTION update_space_timestamp_on_member_change();
+  END IF;
+END
+$$;