dsh: offer the local .27 Ollama models in the chat model dropdown

The dropdown is built from the hardcoded MODEL_CHOICES list in app.py, not from
OmniRoute, so 'ollama/qwen2.5*' existed upstream but could never appear in DSH.

- add ollama/qwen2.5:14b and ollama/qwen2.5-coder:14b to MODEL_CHOICES + MODEL_LABELS
- labels note that Ollama must be started first, since it now boots off on .27
- docs/dsh-architecture.md: new section on model selection, incl. the rebuild
  requirement (app.py is baked into the image via COPY . .) and the ordering trap
  that a model can be live in OmniRoute yet invisible in DSH

Verified: /api/models lists both ids on 3081-3084, and real streamed replies come
back from both local models through DSH.

docs/dsh-architecture.md

@@ -77,7 +77,40 @@ DSH routes user requests across specialized AI services and local house infrastr
 
 ---
 
-## 5. API Endpoints & Request Flow
+## 5. Model Selection (the chat dropdown)
+
+**The model list is hardcoded in `dsh/app.py`** (`MODEL_CHOICES`, ~line 660). DSH does
+**not** discover models from OmniRoute. `GET /api/models` simply returns that list
+plus `MODEL_LABELS` for the friendly names.
+
+Consequence: a model can exist in OmniRoute and still be invisible in DSH until it
+is added to `MODEL_CHOICES` **and** `MODEL_LABELS`.
+
+A chosen model is validated server-side (`if active_model not in MODEL_CHOICES:
+active_model = LLM_MODEL`), so an unlisted id silently falls back to the default.
+
+### Adding a model
+
+1. Confirm it works through OmniRoute first — `curl http://127.0.0.1:20129/v1/models`
+   and then a real `chat/completions` call with a short timeout.
+2. Add the id to `MODEL_CHOICES` and a friendly string to `MODEL_LABELS` in
+   `dsh/app.py`.
+3. Deploy: copy `app.py` to `.13:/home/sam/Docker/Containers/dsh/`, then
+   `docker compose build && docker compose up -d` in that directory (the image
+   bakes `app.py` via `COPY . .`, so a rebuild is required — restarting is not enough).
+4. Verify: `curl -s http://127.0.0.1:3081/api/models` should list the new id.
+
+### Local Ollama models
+
+The `.27` models are exposed by OmniRoute as `ollama/qwen2.5:14b` and
+`ollama/qwen2.5-coder:14b` (`ollama-local/…` also exists but is duplicated).
+Because Ollama now starts **off** at boot, these fail until it is started from the
+family console; hence the `needs Ollama on` label. Inference is CPU-only on `.27`,
+so expect it to be slower than the cloud routes.
+
+---
+
+## 6. API Endpoints & Request Flow
 
 ### Primary API Routes (`dsh/app.py`)
 
@@ -96,7 +129,7 @@ DSH routes user requests across specialized AI services and local house infrastr
 
 ---
 
-## 6. Embedding & Security Headers
+## 8. Embedding & Security Headers
 
 To support seamless inline framing inside the Family Home Lab Console (`/tool/dsh`):
 - **Content Security Policy (CSP)**: `frame-ancestors https://console.lab.audasmedia.com.au`
@@ -104,7 +137,7 @@ To support seamless inline framing inside the Family Home Lab Console (`/tool/ds
 
 ---
 
-## 7. Environment Variables Reference
+## 9. Environment Variables Reference
 
 | Variable | Default Value | Purpose |
 | :--- | :--- | :--- |

dsh/app.py

@@ -665,6 +665,11 @@ MODEL_CHOICES = ["auto/best-chat",
                  "auto/best-reasoning",
                  "auto/best-coding",
                  "auto/best-vision",
+                 # Local models on .27, reached through OmniRoute. Free to run, but
+                 # Ollama must be started first (family console -> AI Tools ->
+                 # Ollama Local LLM). CPU inference, so slower than the cloud ones.
+                 "ollama/qwen2.5:14b",
+                 "ollama/qwen2.5-coder:14b",
                  "openrouter/deepseek/deepseek-v4-flash",
                  "openrouter/deepseek/deepseek-v4-pro"]
 MODEL_LABELS = {
@@ -676,6 +681,8 @@ MODEL_LABELS = {
     "auto/best-reasoning": "Reasoning · OmniRoute best",
     "auto/best-coding": "Coding · OmniRoute best",
     "auto/best-vision": "Multimodal · OmniRoute vision",
+    "ollama/qwen2.5:14b": "Local · Qwen2.5 14B (.27, needs Ollama on)",
+    "ollama/qwen2.5-coder:14b": "Local · Qwen2.5 Coder 14B (.27, needs Ollama on)",
     "openrouter/deepseek/deepseek-v4-flash": "DeepSeek v4 flash (OpenRouter)",
     "openrouter/deepseek/deepseek-v4-pro": "DeepSeek v4 pro (OpenRouter)",
 }