Update SOPs: consolidate index, clean client data, set Imagen as default

- README: rewrite index to reflect actual files (STACK/CONTENT/OPTIMIZATION);
  remove 15 dead links to old numbered SOPs; add subdirectory table; update
  image gen to Google Imagen as default
- STACK: fix wp-divi-pipeline script paths; genericize vibrantyou/domain
  examples; strip pre-existing em dashes throughout
- CONTENT: update image generation default to Google Imagen API with allotted quota
- image-gen-workflow: remove client-specific cobhamtech data; generalize
  brand palette step; update date
- wp-divi-pipeline-to-am-stack: remove vibrantyou.yoga client data block;
  fix Related SOPs links to current files

local-image-generation/README.md

@@ -1,15 +1,15 @@
-# Local Image Generation — SOPs
+# Local Image Generation: SOPs
 
 Complete reference for generating site images locally using ComfyUI.
 No cloud API required. No per-image cost. Runs on the Arising Media workstation.
 
 ## Index
 
-1. [01-comfyui-setup.md](01-comfyui-setup.md) — Installing ComfyUI, venv, GGUF node
-2. [02-flux-images.md](02-flux-images.md) — FLUX.1 Schnell image generation pipeline
-3. [03-wan-video.md](03-wan-video.md) — Wan 2.2 image-to-video pipeline
-4. [04-prompt-guide.md](04-prompt-guide.md) — Prompt patterns for interior/carpet photography
-5. [05-quality-levers.md](05-quality-levers.md) — Prompt, steps, model size: what to adjust and when
+1. [01-comfyui-setup.md](01-comfyui-setup.md): Installing ComfyUI, venv, GGUF node
+2. [02-flux-images.md](02-flux-images.md): FLUX.1 Schnell image generation pipeline
+3. [03-wan-video.md](03-wan-video.md): Wan 2.2 image-to-video pipeline
+4. [04-prompt-guide.md](04-prompt-guide.md): Prompt patterns for interior/carpet photography
+5. [05-quality-levers.md](05-quality-levers.md): Prompt, steps, model size: what to adjust and when
 
 ## Quick start (images already set up)
 
@@ -42,5 +42,5 @@ docker compose build --no-cache web && docker compose up -d
 
 ## Reference project
 
-`lahrcarpetcleaning.com` — first project using this full pipeline.
+`lahrcarpetcleaning.com`: first project using this full pipeline.
 Scripts: `tools/gen-images-flux.py`, `tools/gen-video-wan.py`, `tools/convert-to-webp.py`