Auto-link Story Bible mentions in the draft, with a hover card to the entry

Bare proper nouns in prose ("Bixby walked in") now resolve against the
Story Bible automatically, the same as the existing [[wiki-links]] and
@mentions markup — no manual linking required. Matching is case-sensitive
and requires a capitalized, 3+ character match to a sheet's name or alias,
which is what keeps a character named "Hope" or "Will" from lighting up
on every unrelated use of the word; the longest phrase wins an overlap
("Bixby Reynolds" over "Bixby"), and a bare match never overrides the
author's own explicit markup.

Hovering a highlighted mention shows a card with the item's name, type
(Person/Place/Thing) and a summary (from a new summary:/description:
frontmatter field), with a link that opens the entry in the Story Bible
editor. The card appears after a short delay and stays open while the
pointer crosses onto it to reach the link.

Along the way:
- StoryBibleReference now carries absolute byte offsets (start/end) and
  the resolved item_id, replacing column/length, which were actually
  per-line and were being used as whole-buffer offsets — every reference
  past a file's first line highlighted and jumped-to in the wrong place.
  find_references() also now walks the buffer one char at a time rather
  than one byte, which could previously land mid-character and panic on
  any manuscript with accented letters or an em dash.
- build_story_bible_index() had its own, separately hardcoded list of
  Story Bible directory names that had drifted from
  find_story_bible_directory()'s list and no longer included
  03-Story-Bible, the bundled template's actual folder — so the index,
  and everything built on it, was silently empty for every project made
  from that template. It now reuses the one list.
- Story Bible Editor window: its tree and content ScrollAreas (and the
  content TextEdit) had no id_salt, so egui treated them as the same
  widget — fixed with explicit salts.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/workspace.rs

@@ -341,37 +341,38 @@ impl App {
     }
 
     /// Build the Story Bible index from the Story Bible directory.
+    ///
+    /// Uses [`Self::find_story_bible_directory`] for the primary lookup —
+    /// this used to keep its own, separately-hardcoded list of directory
+    /// names, which had drifted out of sync and no longer included
+    /// `03-Story-Bible`, the bundled template's actual folder. That silently
+    /// left the index empty (no highlighting, no hover cards, no hits in the
+    /// Story Bible window) for every project made from the snowflake
+    /// template, so there is now exactly one place that name is spelled.
     pub(super) fn build_story_bible_index(&mut self) {
         use std::path::Path;
-        let ws = self.config.workspace.clone();
-        // Look for Story Bible directory - common locations
-        let story_bible_dirs = [
-            "03-Characters",
-            "02-Story Bible",
-            "Story Bible",
-            "Characters",
-        ];
-        
-        for dir_name in story_bible_dirs.iter() {
-            let dir_path = Path::new(&ws).join(dir_name);
-            if dir_path.exists() && dir_path.is_dir() {
-                self.story_bible_index = crate::story_bible::StoryBibleIndex::build(&dir_path);
-                return;
-            }
+        if let Some(dir_path) = self.find_story_bible_directory() {
+            self.story_bible_index = crate::story_bible::StoryBibleIndex::build(&dir_path);
+            return;
         }
-        // If no specific Story Bible directory found, try to find all character/location/lore dirs
+        self.story_bible_index = crate::story_bible::StoryBibleIndex::default();
+        // No single Story Bible directory found — fall back to merging
+        // whatever scattered character/location/lore folders exist.
+        let ws = self.config.workspace.clone();
         let possible_dirs = ["03-Characters", "04-Locations", "05-Lore", "Characters", "Locations", "Lore"];
         for dir_name in possible_dirs.iter() {
             let dir_path = Path::new(&ws).join(dir_name);
             if dir_path.exists() && dir_path.is_dir() {
                 let index = crate::story_bible::StoryBibleIndex::build(&dir_path);
-                // Merge with existing index
                 for (id, item) in index.items_by_id {
                     self.story_bible_index.items_by_id.insert(id, item.clone());
                 }
                 for (name, item) in index.items_by_name {
                     self.story_bible_index.items_by_name.insert(name, item);
                 }
+                for (alias, item) in index.items_by_alias {
+                    self.story_bible_index.items_by_alias.insert(alias, item);
+                }
             }
         }
     }