feat(v5): add Inertia app shell with Flux health

Adds v5 routing, middleware, home page rendering, team context sharing,
project model/table support, and Flux health reporting. Installs Flux in
container builds with role-aware s6 services and documents runtime roles.

docker/development/Dockerfile

@@ -5,6 +5,8 @@ ARG SERVERSIDEUP_PHP_VERSION=8.4-fpm-nginx-alpine
 ARG MINIO_VERSION=RELEASE.2025-05-21T01-59-54Z
 # https://github.com/cloudflare/cloudflared/releases
 ARG CLOUDFLARED_VERSION=2025.7.0
+# https://github.com/coollabsio/coold/releases/tag/nightly
+ARG COOLIFY_FLUX_VERSION=nightly
 # https://www.postgresql.org/support/versioning/
 # Note: We are using version 18 of the postgres client (while still using postgres 15 for the postgres server) as version 15 has been removed from Alpine 3.23+ https://pkgs.alpinelinux.org/packages?name=postgresql*-client&branch=v3.23&repo=&arch=x86_64&origin=&flagged=&maintainer=
 ARG POSTGRES_VERSION=18
@@ -24,8 +26,10 @@ FROM serversideup/php:${SERVERSIDEUP_PHP_VERSION}
 ARG USER_ID
 ARG GROUP_ID
 ARG TARGETPLATFORM
+ARG TARGETARCH
 ARG POSTGRES_VERSION
 ARG CLOUDFLARED_VERSION
+ARG COOLIFY_FLUX_VERSION
 ARG NGINX_VERSION
 
 WORKDIR /var/www/html
@@ -58,6 +62,7 @@ RUN apk upgrade --no-cache && \
 RUN apk add --no-cache \
     postgresql${POSTGRES_VERSION}-client \
     openssh-client \
+    openssl \
     git \
     git-lfs \
     jq \
@@ -81,6 +86,28 @@ RUN mkdir -p /usr/local/bin && \
     fi && \
     chmod +x /usr/local/bin/cloudflared
 
+# Install Flux from coold nightly release based on architecture
+RUN set -eux; \
+    mkdir -p /usr/local/bin /run/coolify /etc/coolify; \
+    chown -R www-data:www-data /run/coolify /etc/coolify; \
+    case "${TARGETARCH:-}" in \
+        amd64|arm64) FLUX_ARCH="${TARGETARCH}" ;; \
+        "") \
+            case "$(uname -m)" in \
+                x86_64) FLUX_ARCH="amd64" ;; \
+                aarch64) FLUX_ARCH="arm64" ;; \
+                *) echo "unsupported Flux arch: $(uname -m)" >&2; exit 1 ;; \
+            esac ;; \
+        *) echo "unsupported Flux TARGETARCH: ${TARGETARCH}" >&2; exit 1 ;; \
+    esac; \
+    curl -fsSL --retry 3 --max-time 120 \
+        -o /tmp/flux.tar.gz \
+        "https://github.com/coollabsio/coold/releases/download/${COOLIFY_FLUX_VERSION}/flux-linux-musl-${FLUX_ARCH}.tar.gz"; \
+    tar -xzf /tmp/flux.tar.gz -C /tmp; \
+    test -f /tmp/flux; \
+    install -m 0755 /tmp/flux /usr/local/bin/flux; \
+    rm -f /tmp/flux /tmp/flux.tar.gz
+
 # Configure PHP
 COPY docker/development/etc/php/conf.d/zzz-custom-php.ini /usr/local/etc/php/conf.d/zzz-custom-php.ini
 ENV PHP_OPCACHE_ENABLE=0