addons: Filebrowser & Filebrowser-Quantum get warning if host install (#13639)

* fix(filebrowser-quantum): warn when addon is run directly on Proxmox host

Detect /etc/pve and show a clear warning with link to the recommended
LXC installer. User must explicitly confirm to continue on the host,
addressing the size calculation and indexing issues reported in
gtsteffaniak/filebrowser#1893.

Closes #13636

* fix(filebrowser): improve host warning text and add to filebrowser addon

- Clarify that passthrough drives are not visible on the Proxmox host
- Mention incorrect disk usage stats and incomplete file browsing
- Add same warning to filebrowser (non-quantum) addon which also serves from /
- Reduce verbosity, remove redundant phrasing

* fix(filebrowser): fix misleading host warning wording

Remove reference to a non-existent dedicated LXC installer.
The addons should simply be run inside an LXC or VM instead.

Author: MickLesk

tools/addon/filebrowser-quantum.sh

@@ -43,6 +43,21 @@ IP=$(ip -4 addr show "$IFACE" | awk '/inet / {print $2}' | cut -d/ -f1 | head -n
 [[ -z "$IP" ]] && IP=$(hostname -I | awk '{print $1}')
 [[ -z "$IP" ]] && IP="127.0.0.1"
 
+# Proxmox Host Warning
+if [[ -d "/etc/pve" ]]; then
+  echo -e "${RD}⚠️  Warning: Running this addon directly on the Proxmox host is not recommended!${CL}"
+  echo -e "${YW}   Only the boot disk will be visible — passthrough drives will not be indexed.${CL}"
+  echo -e "${YW}   This causes incorrect disk usage stats and incomplete file browsing.${CL}"
+  echo -e "${YW}   Run this addon inside an LXC or VM instead and mount your drives there.${CL}"
+  echo ""
+  echo -n "Continue anyway on the Proxmox host? (y/N): "
+  read -r host_confirm
+  if [[ ! "${host_confirm,,}" =~ ^(y|yes)$ ]]; then
+    echo -e "${YW}Aborted.${CL}"
+    exit 0
+  fi
+fi
+
 # OS Detection
 if [[ -f "/etc/alpine-release" ]]; then
   OS="Alpine"

tools/addon/filebrowser.sh

@@ -41,6 +41,21 @@ IP=$(ip -4 addr show "$IFACE" | awk '/inet / {print $2}' | cut -d/ -f1 | head -n
 [[ -z "$IP" ]] && IP=$(hostname -I | awk '{print $1}')
 [[ -z "$IP" ]] && IP="127.0.0.1"
 
+# Proxmox Host Warning
+if [[ -d "/etc/pve" ]]; then
+  echo -e "${RD}⚠️  Warning: Running this addon directly on the Proxmox host is not recommended!${CL}"
+  echo -e "${YW}   Only the boot disk will be visible — passthrough drives will not be indexed.${CL}"
+  echo -e "${YW}   This causes incorrect disk usage stats and incomplete file browsing.${CL}"
+  echo -e "${YW}   Run this addon inside an LXC or VM instead and mount your drives there.${CL}"
+  echo ""
+  echo -n "Continue anyway on the Proxmox host? (y/N): "
+  read -r host_confirm
+  if [[ ! "${host_confirm,,}" =~ ^(y|yes)$ ]]; then
+    echo -e "${YW}Aborted.${CL}"
+    exit 0
+  fi
+fi
+
 # Detect OS
 if [[ -f "/etc/alpine-release" ]]; then
   OS="Alpine"