feat(homepage): split AI fleet into role-based groups on a dedicated AI tab

Move the ~22-service flat "AI Systems" group off the Main tab into a new
four-tab layout (Main / AI / Infrastructure / Toolchain). The AI tab sorts
the inference fleet by function into seven groups:

  AI - Inference        gen, char-rp, char-rp-reasoning, Granite summarizer
  AI - Eval & Retrieval Selene, Skywork Reward, Qwen3 rerank/embed, image-bench
  AI - Gateways & Chat  LiteLLM, Asset Engine, Gateway Chat, Open WebUI, ...
  AI - Speech (TTS)     Chatterbox Fast, Kokoro, mOrpheus
  AI - Audio Tools      Parakeet ASR, YT Voice Clipper
  AI - Image & Media    ComfyUI, Arbo
  AI - Dormant          stopped rollback seats + retired auditions

Relabel each stack's homepage.group so canonical stacks/ matches the live
containers on ana-ml2, ana-docker, and irv-ml1. Dormant stacks were refreshed
with `docker compose up --no-start` so they carry the new label while staying
stopped (compose-start rollback preserved). settings.yaml drives tab/order/
columns; services.yaml and README updated to the new scheme.

configs/homepage/settings.yaml

@@ -27,11 +27,23 @@ statusStyle: ""
 # than plain link cards and the grid looks ragged.
 useEqualHeights: true
 
-# Function-first layout, three-tab split:
-#   Main           - daily-use apps, inference, media, bookmarks
+# Function-first layout, four-tab split:
+#   Main           - daily-use apps, media, bookmarks, monitoring
+#   AI             - the inference fleet, grouped by role (see below)
 #   Infrastructure - hardware, hypervisors, BMCs (per site)
 #   Toolchain      - backend services running but rarely clicked
 #
+# The AI tab splits the fleet by function so a 20+ service list reads as
+# sorted groups instead of one endless column. Group membership is set by
+# the homepage.group=AI - <role> label on each service's compose file:
+#   AI - Inference        LLM seats you call (gen, char-rp, char-rp-reasoning, summarizer)
+#   AI - Eval & Retrieval judges, reward, rerank, embed, image-quality
+#   AI - Gateways & Chat  routing gateway, control plane, chat frontends
+#   AI - Speech (TTS)     text-to-speech engines
+#   AI - Audio Tools      speech-to-text + audio dataset tooling
+#   AI - Image & Media    image/video generation + pipelines
+#   AI - Dormant          stopped stacks (rollback seats, retired auditions)
+#
 # Row counts target ~4-per-row so dense groups (Apps, Service Networking)
 # read as a grid instead of an endless column.
 layout:
@@ -50,11 +62,6 @@ layout:
     tab: Main
     style: row
     columns: 4
-  AI Systems:
-    icon: mdi-brain
-    tab: Main
-    style: row
-    columns: 4
   Apps:
     icon: mdi-apps
     tab: Main
@@ -73,6 +80,45 @@ layout:
     tab: Main
     style: row
     columns: 3
+  # --- AI tab: the inference fleet, ordered core-models -> support -> apps ---
+  AI - Inference:
+    icon: mdi-brain
+    tab: AI
+    style: row
+    columns: 4
+  AI - Eval & Retrieval:
+    icon: mdi-scale-balance
+    tab: AI
+    style: row
+    columns: 5
+  AI - Gateways & Chat:
+    icon: mdi-router-network
+    tab: AI
+    style: row
+    columns: 3
+  AI - Speech (TTS):
+    icon: mdi-account-voice
+    tab: AI
+    style: row
+    columns: 3
+  AI - Audio Tools:
+    icon: mdi-waveform
+    tab: AI
+    style: row
+    columns: 2
+  AI - Image & Media:
+    icon: mdi-image-multiple
+    tab: AI
+    style: row
+    columns: 2
+  # Stopped stacks kept for rollback / superseded seats / retired auditions.
+  # They stay 'created' (not running) via `docker compose up --no-start`, so
+  # they show here as offline cards and revive with `docker compose start`.
+  AI - Dormant:
+    icon: mdi-sleep
+    tab: AI
+    style: row
+    columns: 4
   Infra - ANA:
     icon: si-proxmox
     tab: Infrastructure