fix(models): preserve preset rename compatibility

docs/guides/configure-model-fallback.md

@@ -32,16 +32,14 @@ with ones you control:
 ```json
 {
   "modelPresets": {
-    "fast": {
-      "label": "Fast",
+    "Fast": {
       "provider": "primary-provider",
       "model": "primary-model-id",
       "maxTokens": 4096,
       "contextWindowTokens": 65536,
       "temperature": 0.1
     },
-    "deep": {
-      "label": "Deep",
+    "Deep": {
       "provider": "fallback-provider",
       "model": "fallback-model-id",
       "maxTokens": 4096,
@@ -51,8 +49,8 @@ with ones you control:
   },
   "agents": {
     "defaults": {
-      "modelPreset": "fast",
-      "fallbackModels": ["deep"]
+      "modelPreset": "Fast",
+      "fallbackModels": ["Deep"]
     }
   }
 }
@@ -69,7 +67,7 @@ for common providers.
   how much context can fit.
 - Put cheaper or faster fallbacks before expensive ones when acceptable.
 - Use `/model <preset>` for runtime switching without editing config.
-- Keep labels human-readable for WebUI model lists.
+- Keep preset names human-readable; the same name appears in the WebUI and `/model`.
 
 ## Security notes
 

docs/guides/configure-ollama-prompt-cache.md

@@ -179,8 +179,7 @@ Merge this preset into `~/.nanobot/config.json` and select it:
     }
   },
   "modelPresets": {
-    "ollamaPrefixStable": {
-      "label": "Ollama Llama 3.1 prefix-stable",
+    "Ollama Llama 3.1 prefix-stable": {
       "provider": "ollama",
       "model": "llama3.1:8b-prefix-stable-v1",
       "maxTokens": 2048,
@@ -190,7 +189,7 @@ Merge this preset into `~/.nanobot/config.json` and select it:
   },
   "agents": {
     "defaults": {
-      "modelPreset": "ollamaPrefixStable"
+      "modelPreset": "Ollama Llama 3.1 prefix-stable"
     }
   }
 }

docs/guides/configure-openai-compatible-provider.md

@@ -41,8 +41,7 @@ Merge this into `~/.nanobot/config.json`:
     }
   },
   "modelPresets": {
-    "primary": {
-      "label": "Custom",
+    "Custom": {
       "provider": "custom",
       "model": "provider-model-name",
       "maxTokens": 4096,
@@ -52,7 +51,7 @@ Merge this into `~/.nanobot/config.json`:
   },
   "agents": {
     "defaults": {
-      "modelPreset": "primary"
+      "modelPreset": "Custom"
     }
   }
 }