v0.26.0:0 - disk-driven model menu (scan sparks; recipes; needs-setup)

The dashboard menu is now the set of models actually downloaded on the
Sparks, not a hard-coded catalog. models.yaml + overrides are reframed as
launch recipes matched to an on-disk model by repo; an on-disk model with
no recipe is flagged needs_setup and its launch settings are inferred from
its config.json for a one-time operator confirmation (discovery.py).

- delete now removes weights AND the menu card (delete_from_disk sweeps all
  hosts; the delete endpoint resolves keys via the live menu)
- new GET /api/models/suggest; /api/models returns the menu + a recipes list
  (download autocomplete); GET /api/models/disk-status removed
- dropped the two legacy Qwen recipes (235B FP8, 2.5 72B)
- tests: +test_discovery.py (cache parsing, infer_recipe, build_menu merge)

image/app/static/index.html

@@ -241,9 +241,10 @@
 
       <dialog id="catalog-dialog" class="modal">
         <form method="dialog" class="modal-form" id="catalog-form">
-          <h3>Add downloaded model to catalog</h3>
-          <p class="muted small">It will appear as a new card you can swap to. Knob values become its default launch flags — you can tweak later via the model's "Advanced" panel.</p>
-          <label class="modal-row"><span>Key (URL-safe id)</span><input type="text" id="cd-key" required pattern="[a-zA-Z0-9_-]+"></label>
+          <h3>Set up this model</h3>
+          <p class="muted small">This model is downloaded, but Spark Control needs to know how to launch it. We've guessed from the model's own files — confirm or adjust, and it's saved so you're never asked again.</p>
+          <p id="cd-detected" class="muted small cd-detected hidden"></p>
+          <label class="modal-row"><span>Key (URL-safe id)</span><input type="text" id="cd-key" required pattern="[a-zA-Z0-9_-]+" readonly></label>
           <label class="modal-row"><span>Display name</span><input type="text" id="cd-name" required></label>
           <label class="modal-row"><span>Repo (read-only)</span><input type="text" id="cd-repo" readonly></label>
           <label class="modal-row"><span>Size (GB)</span><input type="number" id="cd-size" step="0.1" min="0"></label>
@@ -264,7 +265,7 @@
           </fieldset>
           <div class="modal-actions">
             <button type="button" id="cd-cancel" class="btn">Cancel</button>
-            <button type="submit" class="btn primary">Add to catalog</button>
+            <button type="submit" id="cd-submit" class="btn primary">Save settings</button>
           </div>
         </form>
       </dialog>
@@ -302,14 +303,14 @@
 
       <dialog id="disk-delete-dialog" class="modal">
         <form method="dialog" class="modal-form">
-          <h3>Delete model weights from disk?</h3>
+          <h3>Remove this model from the Sparks?</h3>
           <p id="dd-summary" class="muted small"></p>
           <ul class="muted small dd-hosts" id="dd-hosts"></ul>
-          <p class="muted small">This is reversible — you can re-download from the catalog at any time. The catalog entry stays intact.</p>
+          <p class="muted small">This deletes the weights and removes the card from the menu. You can always download it again later (re-downloading restores its saved settings).</p>
           <p id="dd-error" class="muted small dd-error hidden"></p>
           <div class="modal-actions">
             <button type="button" id="dd-cancel" class="btn">Cancel</button>
-            <button type="button" id="dd-confirm" class="btn danger">Delete from disk</button>
+            <button type="button" id="dd-confirm" class="btn danger">Remove from disk &amp; menu</button>
           </div>
         </form>
       </dialog>
@@ -354,11 +355,12 @@
         <div class="download-form" id="download-form">
           <label class="dl-row">
             <span class="dl-label">HuggingFace repo</span>
-            <input type="text" id="dl-repo" placeholder="e.g. RedHatAI/Qwen3.6-35B-A3B-NVFP4" autocomplete="off">
+            <input type="text" id="dl-repo" placeholder="e.g. RedHatAI/Qwen3.6-35B-A3B-NVFP4" autocomplete="off" list="dl-suggestions">
+            <datalist id="dl-suggestions"></datalist>
             <a id="dl-hf-link" class="dl-hf-link hidden" href="#" target="_blank" rel="noopener" title="Open on Hugging Face">↗</a>
           </label>
           <div class="dl-help muted small">
-            <a href="https://huggingface.co/models?other=vllm" target="_blank" rel="noopener">Browse vLLM-compatible models</a>
+            Type any repo, or pick a known one from the list. <a href="https://huggingface.co/models?other=vllm" target="_blank" rel="noopener">Browse vLLM-compatible models</a>
             · NVFP4-quantized models (e.g. <code>RedHatAI/...</code>) are best for Blackwell hardware
           </div>
           <div class="dl-row">