feat: монорепо миграция, Discover/SearxNG улучшения

- Миграция на монорепозиторий (apps/frontend, apps/chat-service, etc.)
- Discover: проверка SearxNG, понятное empty state при ненастроенном поиске
- searxng.ts: валидация URL, проверка JSON-ответа, авто-добавление http://
- docker/searxng-config: настройки для JSON API SearxNG

Co-authored-by: Cursor <cursoragent@cursor.com>

docker/Dockerfile

@@ -0,0 +1,76 @@
+FROM node:24.5.0-slim AS builder
+
+RUN apt-get update && apt-get install -y python3 python3-pip sqlite3 && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /home/gooseek
+
+COPY package.json package-lock.json ./
+COPY apps/frontend/package.json ./apps/frontend/
+COPY apps/shared-types/package.json ./apps/shared-types/
+COPY apps/shared-utils/package.json ./apps/shared-utils/
+
+RUN npm install
+
+COPY apps ./apps
+
+RUN mkdir -p /home/gooseek/apps/frontend/data
+ENV DATA_DIR=/home/gooseek/apps/frontend
+RUN npm run build
+
+FROM node:24.5.0-slim
+
+RUN apt-get update && apt-get install -y \
+    python3-dev python3-babel python3-venv python-is-python3 \
+    uwsgi uwsgi-plugin-python3 \
+    git build-essential libxslt-dev zlib1g-dev libffi-dev libssl-dev \
+    curl sudo \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /home/gooseek
+
+COPY --from=builder /home/gooseek/apps/frontend/public ./public
+COPY --from=builder /home/gooseek/apps/frontend/.next/static ./public/_next/static
+COPY --from=builder /home/gooseek/apps/frontend/.next/standalone ./
+COPY --from=builder /home/gooseek/apps/frontend/drizzle ./drizzle
+
+RUN mkdir -p /home/gooseek/data /home/gooseek/uploads
+
+RUN useradd --shell /bin/bash --system \
+    --home-dir "/usr/local/searxng" \
+    --comment 'Privacy-respecting metasearch engine' \
+    searxng
+
+RUN mkdir "/usr/local/searxng"
+RUN mkdir -p /etc/searxng
+RUN chown -R "searxng:searxng" "/usr/local/searxng"
+
+COPY docker/searxng/settings.yml /etc/searxng/settings.yml
+COPY docker/searxng/limiter.toml /etc/searxng/limiter.toml
+COPY docker/searxng/uwsgi.ini /etc/searxng/uwsgi.ini
+RUN chown -R searxng:searxng /etc/searxng
+
+USER searxng
+
+RUN git clone "https://github.com/searxng/searxng" \
+                   "/usr/local/searxng/searxng-src"
+
+RUN python3 -m venv "/usr/local/searxng/searx-pyenv"
+RUN "/usr/local/searxng/searx-pyenv/bin/pip" install --upgrade pip setuptools wheel pyyaml msgspec
+RUN cd "/usr/local/searxng/searxng-src" && \
+    "/usr/local/searxng/searx-pyenv/bin/pip" install --use-pep517 --no-build-isolation -e .
+
+USER root
+
+WORKDIR /home/gooseek
+COPY docker/entrypoint.sh ./entrypoint.sh
+RUN chmod +x ./entrypoint.sh
+RUN sed -i 's/\r$//' ./entrypoint.sh || true
+
+RUN echo "searxng ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
+
+EXPOSE 3000 8080
+
+ENV SEARXNG_API_URL=http://localhost:8080
+ENV DATA_DIR=/home/gooseek
+
+CMD ["/home/gooseek/entrypoint.sh"]