docs: Update all references from old 05-Plot/06-First Draft to merged 05-First Draft

- Update project_template test to verify old directories are NOT created
- Update hover text and comments in project.rs
- Update comments and code in file_list.rs
- Update comment in spelling.rs
- Add test assertions to verify 05-Plot and 06-First Draft don't exist in new projects

This ensures all code references match the merged directory structure where
planning and draft content are combined in 05-First Draft with YAML frontmatter.

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

src/app/file_list.rs

@@ -10,14 +10,14 @@ const MAX_DISPLAY_NAME_LEN: usize = 30;
 /// Convert a manuscript folder path to its corresponding outline file path.
 ///
 /// For the snowflake template:
-/// - `06-First Draft/Act 1` → `04-Outline/scene_breakdown/act_01.md`
-/// - `06-First Draft/Act 2` → `04-Outline/scene_breakdown/act_02.md`
+/// - `05-First Draft/Act 1` → `04-Outline/scene_breakdown/act_01.md`
+/// - `05-First Draft/Act 2` → `04-Outline/scene_breakdown/act_02.md`
 /// - etc.
 fn outline_path_for_folder(folder_path: &str) -> Option<String> {
     // Split the path into components
     let parts: Vec<&str> = folder_path.split('/').collect();
     
-    // We expect paths like "06-First Draft/Act 1"
+    // We expect paths like "05-First Draft/Act 1"
     if parts.len() < 2 {
         return None;
     }
@@ -542,8 +542,7 @@ impl App {
                     if ui
                         .button("＋ New Scene")
                         .on_hover_text(
-                            "Create a planning file in 05-Plot and a linked draft file \
-                             in 06-First Draft with automatic cross-references",
+                            "Create a new scene file with YAML frontmatter in 05-First Draft"
                         )
                         .clicked()
                     {

src/app/project.rs

@@ -503,11 +503,14 @@ impl App {
                                 egui::TextEdit::singleline(
                                     &mut self.config.project_open_subdir,
                                 )
-                                .hint_text("06-First Draft")
+                                .hint_text("05-First Draft")
                                 .desired_width(280.0),
                             )
                             .on_hover_text(
-                                "Which folder of a project holds the book. Its files                                  are ordered, numbered and exported; the rest of the                                  project is reference. A leading number is optional,                                  so “First Draft” also matches “06-First Draft”.",
+                                "Which folder of a project holds the book. Its files \
+                                 are ordered, numbered and exported; the rest of the \
+                                 project is reference. A leading number is optional, \
+                                 so \"First Draft\" also matches \"05-First Draft\".",
                             );
                         save_now |= r.lost_focus();
                         ui.end_row();

src/app/spelling.rs

@@ -196,7 +196,7 @@ impl App {
 
     /// The project's character folder, looked for beside the workspace and then
     /// up through its ancestors — in a snowflake project the workspace is
-    /// `06-First Draft` and the sheets are its sibling `03-Characters`.
+    /// `05-First Draft` and the sheets are its sibling `03-Story-Bible`.
     pub(super) fn characters_dir(&self) -> Option<PathBuf> {
         /// How far up to look before giving up; deep enough for the layout,
         /// shallow enough not to wander into the home directory.

src/project_template.rs

@@ -348,13 +348,24 @@ mod tests {
         assert!(readme_content.contains("MiniJinja Test Project"));
         assert!(readme_content.contains("A project generated with MiniJinja"));
 
-        // Check that the 06-First Draft subdirectory exists (default manuscript folder)
+        // Check that the 05-First Draft subdirectory exists (default manuscript folder)
         let subdir = crate::config::default_project_open_subdir();
         assert!(
             project.join(&subdir).is_dir(),
             "expected a {subdir} folder in {project:?}"
         );
         
+        // Verify old directories (05-Plot, 06-First Draft) are NOT created
+        // (they were merged into 05-First Draft)
+        assert!(
+            !project.join("05-Plot").is_dir(),
+            "05-Plot should not exist (merged into 05-First Draft)"
+        );
+        assert!(
+            !project.join("06-First Draft").is_dir(),
+            "06-First Draft should not exist (merged into 05-First Draft)"
+        );
+
         // Clean up
         let _ = std::fs::remove_dir_all(&out);
     }