fix(ai-frontend): Prevent LobeChat OOM and update host constraints

This commit addresses several issues and updates in the `ai-frontend.nomad` job configuration:

- **LobeChat OOM Fix**: Increased `lobechat` service memory allocation from 512MB to 1024MB to prevent out-of-memory crashes and improve stability.
- **Node Constraint Update**: Updated the `attr.unique.hostname` constraint for both `openwebui` and `lobechat` groups from `hp1-home` to `hp-mini-1` to reflect the correct node hostname.
- **Static Port Assignment**: Explicitly added `static` port definitions for `http` in both `openwebui` (8080) and `lobechat` (3210) services to ensure consistent port binding.
- **Minor Housekeeping**: Cleaned up comments and formatted resource blocks for better readability.

stacks/ai/ai-frontend.nomad

@@ -3,25 +3,26 @@ job "ai-frontend" {
   region      = "home"
   type        = "service"
 
-  # --- OpenWebUI ---
+  # --- OpenWebUI (Keep as is) ---
   group "openwebui" {
     count = 1
 
-    # PIN TO HP1 (Change "hp-mini-1" to your actual node name if different)
     constraint {
       attribute = "${attr.unique.hostname}"
-      value     = "hp1-home" 
+      value     = "hp-mini-1" 
     }
 
     network {
-      port "http" { to = 8080 }
+      port "http" { 
+        static = 8080 
+        to     = 8080
+      }
     }
 
     service {
       name = "openwebui"
       port = "http"
       tags = ["traefik.enable=true"]
-      
       check {
         type     = "http"
         path     = "/health"
@@ -34,7 +35,6 @@ job "ai-frontend" {
       driver = "podman"
       
       env {
-        # Magic: Uses Consul to find the P52 automatically
         OLLAMA_BASE_URL = "http://ollama.service.consul:11434"
       }
 
@@ -46,32 +46,30 @@ job "ai-frontend" {
         ]
       }
       
-      resources {
-        cpu    = 1000
-        memory = 1024
-      }
+      resources { cpu = 1000; memory = 1024 }
     }
   }
 
-  # --- LobeChat ---
+  # --- LobeChat (UPDATED) ---
   group "lobechat" {
     count = 1
     
-    # PIN TO HP1
     constraint {
       attribute = "${attr.unique.hostname}"
-      value     = "hp1-home"
+      value     = "hp-mini-1"
     }
 
     network {
-      port "http" { to = 3210 }
+      port "http" { 
+        static = 3210 
+        to     = 3210
+      }
     }
 
     service {
       name = "lobechat"
       port = "http"
       tags = ["traefik.enable=true"]
-      
       check {
         type     = "http"
         path     = "/api/health"
@@ -95,7 +93,9 @@ job "ai-frontend" {
       
       resources {
         cpu    = 500
-        memory = 512
+        # --- THE FIX ---
+        # Increased from 512 to 1024 to prevent OOM crashes
+        memory = 1024 
       }
     }
   }