refactor(content): rename mood vocabulary to match voice guide (D-035 Sprint 14 amendment)

Schema and Rust Mood enum renamed for author-friendly vocabulary:
fond→warm, comfortable→content, worried→anxious, concerned→frustrated.
Dropped: analytical (merged into focused), conflicted (modeled as
suspicious+warm collision). Added: hostile. Final 8 moods: anxious,
frustrated, content, suspicious, warm, hostile, relieved, focused.
Neutral = untagged. Resolves Gestalt's blocking issue on #121.

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

server/src/content/line_pool.rs

@@ -164,19 +164,17 @@ impl FromStr for Topic {
 
 /// D-028 Layer 4: Mood tag — influences weighted selection.
 ///
-/// 9 v0.1 values: 8 original + Focused added Sprint 8 (D-035 amendment)
-/// for Kael dialogue at The Terminal and maintenance corridors.
+/// 8 v0.1 values aligned to voice guide vocabulary (Sprint 14 rename).
+/// Neutral mood is represented by omitting the mood tag (untagged = baseline).
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub enum Mood {
-    Fond,
-    Comfortable,
-    Worried,
+    Anxious,
+    Frustrated,
+    Content,
     Suspicious,
-    Analytical,
-    Conflicted,
-    Concerned,
+    Warm,
+    Hostile,
     Relieved,
-    /// Added Sprint 8 (D-035 amendment): Kael dialogue at Terminal/corridors.
     Focused,
 }
 
@@ -184,13 +182,12 @@ impl FromStr for Mood {
     type Err = ParseEnumError;
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         match s {
-            "fond" => Ok(Self::Fond),
-            "comfortable" => Ok(Self::Comfortable),
-            "worried" => Ok(Self::Worried),
+            "anxious" => Ok(Self::Anxious),
+            "frustrated" => Ok(Self::Frustrated),
+            "content" => Ok(Self::Content),
             "suspicious" => Ok(Self::Suspicious),
-            "analytical" => Ok(Self::Analytical),
-            "conflicted" => Ok(Self::Conflicted),
-            "concerned" => Ok(Self::Concerned),
+            "warm" => Ok(Self::Warm),
+            "hostile" => Ok(Self::Hostile),
             "relieved" => Ok(Self::Relieved),
             "focused" => Ok(Self::Focused),
             _ => Err(ParseEnumError {
@@ -709,15 +706,14 @@ mod tests {
     #[test]
     fn mood_parse_all_values() {
         let values = [
-            "fond",
-            "comfortable",
-            "worried",
+            "anxious",
+            "frustrated",
+            "content",
             "suspicious",
-            "analytical",
-            "conflicted",
-            "concerned",
+            "warm",
+            "hostile",
             "relieved",
-            "focused", // Sprint 8 amendment (D-035)
+            "focused",
         ];
         for v in values {
             assert!(v.parse::<Mood>().is_ok(), "Failed to parse mood: {}", v);