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

image-gen-workflow/01-model-selection.md

@@ -6,7 +6,7 @@ Source: cutout.pro/model-comparison/imagen-vs-nanobanana + Gemini API model audi
 
 ## Available Models (via Google Gemini API)
 
-### Imagen 4 — Quality Mode
+### Imagen 4: Quality Mode
 Model ID: `imagen-4.0-generate-001`
 Also available: `imagen-4.0-ultra-generate-001`
 
@@ -24,7 +24,7 @@ Use for:
 
 ---
 
-### Nano Banana (Gemini 2.5 Flash Image) — Speed Mode
+### Nano Banana (Gemini 2.5 Flash Image): Speed Mode
 Model ID: `gemini-2.5-flash-image`
 
 Strengths:
@@ -40,7 +40,7 @@ Use for:
 
 ---
 
-### Imagen 4 Fast — Budget Mode
+### Imagen 4 Fast: Budget Mode
 Model ID: `imagen-4.0-fast-generate-001`
 
 Use for:
@@ -52,38 +52,26 @@ Use for:
 
 ## Recommended Workflow
 
-Step 1 — Draft with Speed Mode (`gemini-2.5-flash-image`)
+Step 1: Draft with Speed Mode (`gemini-2.5-flash-image`)
 Generate 2-4 variations quickly. Confirm composition, subject, and tone. Low cost.
 
-Step 2 — Refine with Quality Mode (`imagen-4.0-generate-001`)
+Step 2: Refine with Quality Mode (`imagen-4.0-generate-001`)
 Take the winning prompt from step 1. Generate final version at full quality.
 This is the image that goes into the site.
 
-Step 3 — Review against brand palette
-Check that image tones align with site color tokens:
-- cobhamtech.com: dark navy (#0c0f18), slate (#1c2d42), blue accent (#2d5a9e), gold (#c79330)
-- All hero images need to work behind dark overlays
+Step 3: Review against brand palette
+Check that image tones align with the project's color tokens from `tokens.css`.
+All hero images need to work behind dark overlays.
 
-Step 4 — Save to project assets
+Step 4: Save to project assets
 Path convention: `assets/images/{page}-{slot}.jpg`
 Examples: `hero-bg.jpg`, `about-visual.jpg`, `services-bg.jpg`
 
 ---
 
-## Cobhamtech.com Image Plan
-
-| Slot | File | Page | Prompt Theme |
-|------|------|------|--------------|
-| Hero background | `hero-bg.jpg` | index.html | Dark server room, blue ambient lighting, depth of field |
-| About story | `about-visual.jpg` | about.html | IT professional at clean desk, dual monitors, neutral dark background |
-| Services hub | `services-bg.jpg` | services/index.html | Enterprise network infrastructure, abstract, dark |
-| Intro visual | `intro-visual.jpg` | index.html | Business and technology handshake, professional setting |
-
----
-
 ## Notes
 
 - Never use Nano Banana for final production images on client sites
-- Imagen 4 Ultra adds marginal quality gain over standard — not worth the cost for web assets
+- Imagen 4 Ultra adds marginal quality gain over standard: not worth the cost for web assets
 - All images should be exported as JPEG at 85% quality, max 1600px wide, for web performance
-- Run generated images through the site CSP — ensure `img-src` allows `self` and `data:` only (no external CDN hotlinking)
+- Run generated images through the site CSP: ensure `img-src` allows `self` and `data:` only (no external CDN hotlinking)