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아주 간단한 계산기를 만들어줘

밝은색 UI로 변경해줘

정말화려하게 UI를 수정해줘

UI를 현대적이면서 정말 깔끔하게 수정해줘

계산기 동작을 시키기 위해서 로그인이 되어야만 계산이 될 수 있도록 해주세요. 물론 로그인이 되기 위해서는 회원 가입이 되도록 해야 합니다. 회원 정보는 데이터베이스에 저장을 하고 관리가 되도록 해주세요.

Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 1511, in wsgi_app response = self.full_dispatch_request() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 919, in full_dispatch_request rv = self.handle_user_exception(e) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 917, in full_dispatch_request rv = self.dispatch_request() ^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 902, in dispatch_request return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args) # type: ignore[no-any-return] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/app/app.py", line 142, in login return render_template('login.html') ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/templating.py", line 149, in render_template template = app.jinja_env.get_or_select_template(template_name_or_list) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/jinja2/environment.py", line 1087, in get_or_select_template return self.get_template(template_name_or_list, parent, globals) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/jinja2/environment.py", line 1016, in get_template return self._load_template(name, globals) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/jinja2/environment.py", line 975, in _load_template template = self.loader.load(self, name, self.make_globals(globals)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/jinja2/loaders.py", line 126, in load source, filename, uptodate = self.get_source(environment, name) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/templating.py", line 65, in get_source return self._get_source_fast(environment, template) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/templating.py", line 99, in _get_source_fast raise TemplateNotFound(template) jinja2.exceptions.TemplateNotFound: login.html 에러를 쉊ㅇ해줘 login.html 파일이 없는거 같습니다. 생성해줘

[2025-12-13 10:56:50,785] ERROR in app: Exception on /register [GET] Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 1511, in wsgi_app response = self.full_dispatch_request() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 919, in full_dispatch_request rv = self.handle_user_exception(e) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 917, in full_dispatch_request rv = self.dispatch_request() ^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 902, in dispatch_request return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args) # type: ignore[no-any-return] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/app/app.py", line 110, in register return render_template('register.html') ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/templating.py", line 149, in render_template template = app.jinja_env.get_or_select_template(template_name_or_list) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/jinja2/environment.py", line 1087, in get_or_select_template return self.get_template(template_name_or_list, parent, globals) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/jinja2/environment.py", line 1016, in get_template return self._load_template(name, globals) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/jinja2/environment.py", line 975, in _load_template template = self.loader.load(self, name, self.make_globals(globals)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/jinja2/loaders.py", line 126, in load source, filename, uptodate = self.get_source(environment, name) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/templating.py", line 65, in get_source return self._get_source_fast(environment, template) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/templating.py", line 99, in _get_source_fast raise TemplateNotFound(template) jinja2.exceptions.TemplateNotFound: register.html register.html 파일이 없는거 같습니다. 수정해주세요

172.18.0.1 - - [13/Dec/2025 11:00:33] "POST /register HTTP/1.1" 500 - 에러를 수정해줘

Uncaught TypeError: Cannot read properties of null (reading 'addEventListener') at script.js:86:38 4script.js:65 Uncaught TypeError: Cannot read properties of null (reading 'value') at HTMLFormElement.<anonymous> (script.js:65:50) 에러를 정확하게 수정해줘

[2025-12-13 11:10:00,326] ERROR in app: Exception on /register [GET] Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 1511, in wsgi_app response = self.full_dispatch_request() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 920, in full_dispatch_request return self.finalize_request(rv) ^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 939, in finalize_request response = self.make_response(rv) ^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 1212, in make_response raise TypeError( TypeError: The view function for 'register' did not return a valid response. The function either returned None or ended without a return statement. 172.18.0.1 - - [13/Dec/2025 11:10:00] "GET /register HTTP/1.1" 500 - 에러를 수정해줘

Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 1511, in wsgi_app response = self.full_dispatch_request() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 919, in full_dispatch_request rv = self.handle_user_exception(e) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 917, in full_dispatch_request rv = self.dispatch_request() ^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 902, in dispatch_request return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args) # type: ignore[no-any-return] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/app/app.py", line 67, in wrapper return redirect(url_for('login')) ^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/helpers.py", line 239, in url_for return current_app.url_for( ^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 1121, in url_for return self.handle_url_build_error(error, endpoint, values) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 1110, in url_for rv = url_adapter.build( # type: ignore[union-attr] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/werkzeug/routing/map.py", line 924, in build raise BuildError(endpoint, values, method, self) werkzeug.routing.exceptions.BuildError: Could not build url for endpoint 'login'. Did you mean 'index' instead? 에러를 수정해줘

172.18.0.1 - - [13/Dec/2025 11:20:48] "GET /register HTTP/1.1" 200 - 172.18.0.1 - - [13/Dec/2025 11:20:48] "GET /static/js/script.js HTTP/1.1" 304 - 172.18.0.1 - - [13/Dec/2025 11:21:02] "POST /register HTTP/1.1" 500 - GET은 되는다 POST를 하면 500 에러가 뜹니다. 수정해주세요.