Generate multi-model anchored concepts, drop old Comedy Store refs, and trim the concept gallery

docs/screens/concepts/hollywood_boulevard/README.md

@@ -44,3 +44,15 @@ mild — treat this as the overcast target, not a decay reference.
 ## Across the boulevard
 
 ![Ovation Hollywood frontage across the boulevard](hollywood_boulevard_across_street.png)
+
+## Facade — local-reference anchored, two models
+
+![El Capitan facade anchored on a local research frame, Gemini](el_capitan_facade_gemini_day.png)
+
+![El Capitan facade anchored on a local research frame, GPT image](el_capitan_facade_gpt_day.png)
+
+Both frames are anchored on the same local-only research photo
+(`tmp/research/elcapitan/01.jpg`, gitignored) with `--reference-unchecked`, one with
+`google/gemini-2.5-flash-image` and one with `openai/gpt-5-image-mini`. Provenance and model are
+in each frame's `.refgen.json` sidecar. Local reference only; the photo never enters the repo and
+these frames are art direction, not assets.

docs/screens/concepts/hollywood_boulevard/el_capitan_facade_gemini_day.refgen.json

@@ -0,0 +1,12 @@
+{
+  "concept": "el_capitan_facade_gemini_day",
+  "generated": "el_capitan_facade_gemini_day.png",
+  "model": "google/gemini-2.5-flash-image",
+  "reference": {
+    "file": "tmp/research/elcapitan/01.jpg",
+    "licence": "unchecked",
+    "page": "",
+    "licence_checked": false
+  },
+  "suffix": "Use the attached reference photograph as the fixed source of geometry and composition: keep the building's proportions, column rhythm, band heights, signage placement and camera angle exactly as photographed. Only restage lighting, weather, people and surface condition where the prompt asks for it. Do not invent extra storeys, wings or ornaments that the photo does not show."
+}

docs/screens/concepts/hollywood_boulevard/el_capitan_facade_gpt_day.refgen.json

@@ -0,0 +1,12 @@
+{
+  "concept": "el_capitan_facade_gpt_day",
+  "generated": "el_capitan_facade_gpt_day.png",
+  "model": "openai/gpt-5-image-mini",
+  "reference": {
+    "file": "tmp/research/elcapitan/01.jpg",
+    "licence": "unchecked",
+    "page": "",
+    "licence_checked": false
+  },
+  "suffix": "Use the attached reference photograph as the fixed source of geometry and composition: keep the building's proportions, column rhythm, band heights, signage placement and camera angle exactly as photographed. Only restage lighting, weather, people and surface condition where the prompt asks for it. Do not invent extra storeys, wings or ornaments that the photo does not show."
+}