feat(secubox-core): Add P2P mesh API endpoints for console discovery

- Add /chain/tip endpoint for blockchain tip query
- Add /catalog/console endpoint for version info
- Add symlinks for /api/ prefix compatibility
- Fix chain.json malformed JSON structure

Enables console to discover C3BOX device via mesh API

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package/secubox/secubox-core/root/www/api/api/catalog

@@ -0,0 +1 @@
+../catalog

package/secubox/secubox-core/root/www/api/api/chain

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+../chain

package/secubox/secubox-core/root/www/api/api/peers

@@ -0,0 +1 @@
+../peers

package/secubox/secubox-core/root/www/api/api/status

@@ -0,0 +1 @@
+../status

package/secubox/secubox-core/root/www/api/catalog/console

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+#!/bin/sh
+echo "Content-Type: application/json"
+echo "Access-Control-Allow-Origin: *"
+echo ""
+VERSION=$(cat /etc/secubox-version 2>/dev/null || echo "1.0.0")
+echo "{\"version\":\"$VERSION\",\"name\":\"secubox-console\"}"

package/secubox/secubox-core/root/www/api/chain

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+#!/bin/sh
+# P2P API - Chain endpoint
+# Returns chain tip or specific operations
+
+echo "Content-Type: application/json"
+echo "Access-Control-Allow-Origin: *"
+echo ""
+
+CHAIN_FILE="/srv/secubox/mesh/chain.json"
+NODE_ID=$(cat /srv/secubox/mesh/node.id 2>/dev/null || echo "unknown")
+
+# Parse PATH_INFO for sub-routes: /chain/tip, /chain/since/<hash>
+case "$PATH_INFO" in
+    /tip|"")
+        # Get the latest block hash and return chain tip info
+        if [ -f "$CHAIN_FILE" ]; then
+            LATEST_HASH=$(jsonfilter -i "$CHAIN_FILE" -e "@.blocks[-1].hash" 2>/dev/null)
+            LATEST_INDEX=$(jsonfilter -i "$CHAIN_FILE" -e "@.blocks[-1].index" 2>/dev/null)
+            echo "{\"node\":\"$NODE_ID\",\"hash\":\"$LATEST_HASH\",\"height\":$LATEST_INDEX}"
+        else
+            echo "{\"node\":\"$NODE_ID\",\"hash\":\"\",\"height\":0}"
+        fi
+        ;;
+    /since/*)
+        SINCE_HASH=${PATH_INFO#/since/}
+        # Return blocks since given hash (for sync)
+        if [ -f "$CHAIN_FILE" ]; then
+            cat "$CHAIN_FILE"
+        else
+            echo "{\"blocks\":[]}"
+        fi
+        ;;
+    *)
+        echo "{\"error\":\"unknown_route\",\"path\":\"$PATH_INFO\"}"
+        ;;
+esac

package/secubox/secubox-core/root/www/api/peers

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+#!/bin/sh
+# P2P API - List peers endpoint
+# Responds to requests on port 7331
+
+echo "Content-Type: application/json"
+echo "Access-Control-Allow-Origin: *"
+echo ""
+
+# Get peers from secubox-p2p
+/usr/sbin/secubox-p2p peers 2>/dev/null || echo '{"peers":[],"error":"daemon_unavailable"}'

package/secubox/secubox-core/root/www/api/status

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+#!/bin/sh
+# P2P API - Node status endpoint
+# Responds to requests on port 7331
+
+echo "Content-Type: application/json"
+echo "Access-Control-Allow-Origin: *"
+echo ""
+
+# Get node status from secubox-p2p
+/usr/sbin/secubox-p2p status 2>/dev/null || echo '{"error":"daemon_unavailable"}'