Initial commit: Clean SEO analysis system

input/README.md

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+# Input Directory
+
+Place your source data files here before running the analysis pipeline.
+
+## Required Files
+
+### `new-propositions.csv`
+WordPress posts export with SEO metadata
+- Columns: ID, post_id, Title, post_title, URL, post_url, SEO Title, Meta Description, etc.
+
+### `analytics/ga4_export.csv`
+Google Analytics 4 data export
+- Date range: Last 90 days
+- Columns: Chemin de la page et classe de l'écran (Page path), Vues (Views), Utilisateurs actifs (Users), Durée d'engagement (Duration), etc.
+
+### `analytics/gsc/Pages.csv`
+Google Search Console Pages report
+- Date range: Last 90 days
+- Columns: Pages les plus populaires (Page), Clics (Clicks), Impressions, CTR, Position
+
+## Directory Structure
+
+```
+input/
+├── new-propositions.csv          (WordPress posts)
+└── analytics/
+    ├── ga4_export.csv            (Google Analytics data)
+    └── gsc/
+        ├── Pages.csv             (GSC pages report)
+        ├── Requêtes.csv          (GSC queries report - optional)
+        └── [other GSC exports]
+```
+
+## How to Export Data
+
+### Google Analytics 4
+1. Go to Analytics > Reports > Engagement > Pages and Screens
+2. Set date range to Last 90 days
+3. Click Export > Download CSV
+4. Save as: `input/analytics/ga4_export.csv`
+
+### Google Search Console
+1. Go to Performance
+2. Set date range to Last 90 days
+3. Click Export > Download CSV
+4. Save as: `input/analytics/gsc/Pages.csv`
+
+### WordPress Posts
+Use your existing WordPress export or the SEO propositions CSV