Refactor config merging process to strip comments and update radio_type in Proxmox installer

manage.sh

@@ -902,7 +902,14 @@ validate_and_update_config() {
     # - Adds missing keys from the left operand (example config)
     local temp_merged="${config_file}.merged"
     
-    if "$YQ_CMD" eval-all '. as $item ireduce ({}; . * $item)' "$updated_example" "$config_file" > "$temp_merged" 2>/dev/null; then
+    # Strip comments from user config before merge to prevent comment accumulation.
+    # yq preserves comments from both files, so each upgrade cycle would duplicate
+    # the header and inline comments. We keep only the example's comments.
+    local stripped_user="${config_file}.stripped"
+    "$YQ_CMD" eval '... comments=""' "$config_file" > "$stripped_user" 2>/dev/null || cp "$config_file" "$stripped_user"
+    
+    if "$YQ_CMD" eval-all '. as $item ireduce ({}; . * $item)' "$updated_example" "$stripped_user" > "$temp_merged" 2>/dev/null; then
+        rm -f "$stripped_user"
         # Verify the merged file is valid YAML
         if "$YQ_CMD" eval '.' "$temp_merged" > /dev/null 2>&1; then
             mv "$temp_merged" "$config_file"
@@ -917,7 +924,7 @@ validate_and_update_config() {
         fi
     else
         echo "    ✗ Config merge failed, keeping original"
-        rm -f "$temp_merged"
+        rm -f "$temp_merged" "$stripped_user"
         return 1
     fi
 }

scripts/proxmox-install.sh

@@ -220,18 +220,7 @@ pct exec "$CTID" -- bash -c "
     mkdir -p /etc/pymc_repeater
     if [ -f /root/pyMC_Repeater/config.yaml.example ]; then
         cp /root/pyMC_Repeater/config.yaml.example /etc/pymc_repeater/config.yaml
-        sed -i 's/^radio_type:.*/radio_type: sx1262_ch341/' /etc/pymc_repeater/config.yaml
-        # Add CH341 section if not present
-        if ! grep -q '^ch341:' /etc/pymc_repeater/config.yaml; then
-            cat >> /etc/pymc_repeater/config.yaml <<'CH341CFG'
-
-# CH341 USB-to-SPI adapter settings (only used when radio_type: sx1262_ch341)
-# NOTE: VID/PID are integers. Hex is also accepted in YAML, e.g. 0x1A86.
-ch341:
-  vid: 6790   # 0x1A86
-  pid: 21778  # 0x5512
-CH341CFG
-        fi
+        sed -i 's/^radio_type: sx1262$/radio_type: sx1262_ch341/' /etc/pymc_repeater/config.yaml
     fi
 "