fix: comprehensive QA — resolve 13 bugs, add UX improvements across all services

Client SDK: add .catch() to graphRagStreaming/documentRagStreaming (silent timeout),
null-guard JSON.parse in getPrompts/getSystemPrompt/getPrompt.

Backend: implement "getvalues" config operation for token costs, null-check
createTerm() in FalkorDB triples query, add knowledge-cores service entrypoint
and Docker entry, return proper HTTP 400/404 for gateway error responses.

Workbench: cancel button + elapsed timer for chat, clear agent spinner on error,
flow dialog inline validation, responsive header wrapping, knowledge cores
loading timeout, sidebar/page naming consistency, theme toggle indicator.

Infrastructure: enable Grafana Explore for viewers, add gateway Prometheus
scrape target, fix RAG pipeline dashboard layout (6 panels visible),
filter Service Health to configured targets only.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ts/deploy/docker-compose.yml

@@ -66,7 +66,7 @@ services:
     networks:
       - trustgraph
     healthcheck:
-      test: ["CMD", "wget", "--spider", "-q", "http://localhost:6333/healthz"]
+      test: ["CMD-SHELL", "bash -c 'echo > /dev/tcp/localhost/6333'"]
       interval: 10s
       timeout: 5s
       retries: 3
@@ -179,6 +179,7 @@ services:
       - GF_AUTH_DISABLE_LOGIN_FORM=false
       - GF_USERS_DEFAULT_THEME=dark
       - GF_EXPLORE_ENABLED=true
+      - GF_USERS_VIEWERS_CAN_EDIT=true
       - GF_FEATURE_TOGGLES_ENABLE=traceqlEditor tempoSearch tempoServiceGraph
     depends_on:
       prometheus:
@@ -323,6 +324,18 @@ services:
       - trustgraph
     restart: unless-stopped
 
+  knowledge-cores:
+    image: trustgraph-ts:local
+    command: ["node", "entrypoints/cores.mjs"]
+    environment:
+      - NATS_URL=nats://nats:4222
+    depends_on:
+      nats:
+        condition: service_healthy
+    networks:
+      - trustgraph
+    restart: unless-stopped
+
   # ---------------------------------------------------------------------------
   # Document Processing Pipeline
   # ---------------------------------------------------------------------------

ts/deploy/grafana/dashboards/overview.json

@@ -32,7 +32,7 @@
       "id": 1,
       "targets": [
         {
-          "expr": "up",
+          "expr": "up{job=~\"prometheus|otel-collector|gateway\"}",
           "legendFormat": "{{job}}",
           "refId": "A"
         }

ts/deploy/grafana/dashboards/rag-pipeline.json

@@ -28,7 +28,7 @@
         "type": "prometheus",
         "uid": "tg-prometheus"
       },
-      "gridPos": { "h": 8, "w": 24, "x": 0, "y": 0 },
+      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 0 },
       "id": 1,
       "targets": [
         {
@@ -92,7 +92,7 @@
         "type": "prometheus",
         "uid": "tg-prometheus"
       },
-      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 8 },
+      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 0 },
       "id": 2,
       "targets": [
         {
@@ -151,7 +151,7 @@
         "type": "prometheus",
         "uid": "tg-prometheus"
       },
-      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 8 },
+      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 8 },
       "id": 3,
       "targets": [
         {
@@ -210,7 +210,7 @@
         "type": "prometheus",
         "uid": "tg-prometheus"
       },
-      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 16 },
+      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 8 },
       "id": 4,
       "targets": [
         {
@@ -269,7 +269,7 @@
         "type": "prometheus",
         "uid": "tg-prometheus"
       },
-      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 16 },
+      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 16 },
       "id": 5,
       "targets": [
         {
@@ -328,7 +328,7 @@
         "type": "prometheus",
         "uid": "tg-prometheus"
       },
-      "gridPos": { "h": 8, "w": 24, "x": 0, "y": 24 },
+      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 16 },
       "id": 6,
       "targets": [
         {

ts/deploy/prometheus/prometheus.yml

@@ -13,13 +13,10 @@ scrape_configs:
       - targets:
           - "prometheus:9090"
 
-  # NATS monitoring
-  - job_name: "nats"
-    scrape_interval: 15s
-    metrics_path: "/varz"
-    static_configs:
-      - targets:
-          - "nats:8222"
+  # NATS monitoring (uses nats-prometheus-exporter format)
+  # NATS exposes JSON at /varz, not Prometheus format.
+  # To get proper Prometheus metrics, deploy nats-exporter sidecar.
+  # For now, we rely on NATS healthcheck and JetStream monitoring via /jsz.
 
   # OpenTelemetry Collector (exposes Prometheus metrics from OTLP pipeline)
   - job_name: "otel-collector"
@@ -28,9 +25,10 @@ scrape_configs:
       - targets:
           - "otel-collector:8889"
 
-  # TrustGraph gateway (enabled when gateway container is running)
+  # TrustGraph gateway metrics (prom-client)
   - job_name: "gateway"
-    scrape_interval: 5s
+    scrape_interval: 15s
+    metrics_path: "/api/v1/metrics"
     static_configs:
       - targets:
-          - "gateway:8000"
+          - "gateway:8088"