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/tests/determinism.rs

@@ -392,7 +392,7 @@ fn different_seed_produces_different_replay() {
                     location: "the-terminal".to_string(),
                     role: "dock-worker".to_string(),
                 },
-                CurrentMood(Mood::Comfortable),
+                CurrentMood(Mood::Content),
             ));
         }
 
@@ -408,7 +408,7 @@ fn different_seed_produces_different_replay() {
                 situation: vec![Situation::Routine],
                 topic: vec![],
                 mood: if i % 2 == 0 {
-                    vec![Mood::Comfortable]
+                    vec![Mood::Content]
                 } else {
                     vec![]
                 },