fix: align content field names with blueprints, fix API field calls

Content .txt files:
- narrative.txt (×4): Introduction → Intro
- chapter.txt (×3): Text → Body
- geoformat.txt: Intro → Text
- map.txt: move Text content into Intro field

narrative.json.php:
- parseChapter: $chapter->text() → $chapter->body()
- parseMarker: $marker->text() → $marker->body()
- parseMap: $map->text() → $map->intro()
- narrative root: $page->introduction() → $page->intro()

Also commits Kirby content directory rename (1_cohesion-des-mondes → cohesion-des-mondes)
and new _drafts content.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

public/site/blueprints/pages/chapter.yml

@@ -11,7 +11,7 @@ tabs:
             type: fields
             fields:
               blueprint: fields/blueprint
-              text:
+              body:
                 label: Contenu
                 type: blocks
                 fieldsets:

public/site/blueprints/pages/marker.yml

@@ -15,7 +15,7 @@ tabs:
                 label: Image de couverture
                 type: files
                 multiple: false
-              text:
+              body:
                 label: Contenu
                 type: blocks
                 fieldsets:

public/site/blueprints/pages/narrative.yml

@@ -22,7 +22,7 @@ tabs:
                 text: "{{ file.coverLabel }}"
                 multiple: false
                 width: 1/2
-              introduction:
+              intro:
                 label: Introduction
                 type: writer
           parts:

public/site/templates/narrative.json.php

@@ -136,7 +136,7 @@ function parseChapter($chapter) {
         'template' => 'chapter',
         'title' => $chapter->title()->value(),
         'slug' => $chapter->slug(),
-        'blocks' => parseBlocks($chapter->text(), $chapter)
+        'blocks' => parseBlocks($chapter->body(), $chapter)
     ];
 }
 
@@ -149,7 +149,7 @@ function parseMarker($marker) {
         'cover'    => resolveFileUrl($marker->cover(), $marker),
         'icon'     => $marker->markerIcon()->toFile() ? $marker->markerIcon()->toFile()->url() : null,
         'iconSize' => $marker->markerIconSize()->value() ?? 40,
-        'blocks'   => parseBlocks($marker->text(), $marker)
+        'blocks'   => parseBlocks($marker->body(), $marker)
     ];
 }
 
@@ -172,7 +172,7 @@ function parseMap($map) {
         'slug'     => $map->slug(),
         'tags'     => $map->tags()->isNotEmpty() ? $map->tags()->split() : [],
         'image'    => $staticImage ? $staticImage->url() : null,
-        'intro'    => resolveImagesInHtml($map->text()->value(), $map),
+        'intro'    => resolveImagesInHtml($map->intro()->value(), $map),
         'markers'  => $markers
     ];
 }
@@ -214,7 +214,7 @@ $data = [
     'slug' => $page->slug(),
     'author' => $page->author()->value() ?? '',
     'cover' => resolveFileUrl($page->cover(), $page),
-    'introduction' => resolveImagesInHtml($page->introduction()->value(), $page),
+    'introduction' => resolveImagesInHtml($page->intro()->value(), $page),
     'customCss' => $page->customCss()->value() ?? '',
     'modified' => $page->modified(),
     'modifiedFormatted' => $page->modified('d/m/Y H:i'),