router: sweep dead double-loop and drifted anaphora comment (V-581)

narrativeQueryBuild reimplemented the "any token in list" check the
package already has as hasTok; use it instead of a nested loop.

AnaphoraResolver's doc comments described a stale return shape (a
key/value pair) and an incomplete pronoun list (missing the "that" and
"mine" classes the switch already handled) — fixed the comments to
match the code, no behaviour change.

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

internal/router/slots.go

@@ -438,18 +438,22 @@ func parseDurationValue(s string) (string, bool) {
 }
 
 // AnaphoraResolver resolves pronouns like "это", "он", "она" to the prior
-// turn's key entity. Returns a (key, value) pair the prior fact carried,
-// or ("", "", false) when no pronoun is detected.
+// turn's key entity. Returns the matched pronoun's class as ref, or
+// ("", false) when no pronoun is detected — the caller cross-references ref
+// against the prior turn's own slots, this type holds no state of its own.
 type AnaphoraResolver struct{}
 
 // Resolve checks if text contains an anaphoric reference to a prior turn's
 // entity. For MVP this handles the common Russian pronouns:
-//   - "это" / "этого" / "этому" / "этим" / "этом" → "this" (most common)
+//   - "это" / "этого" / "этому" / "этим" / "этом" / "эти" / "эта" → "this"
+//     (most common)
 //   - "он" / "его" / "ему" / "ним" → "he/it", masc
 //   - "она" / "её" / "ей" / "ней" → "she/it", fem
 //   - "оно" → "it", neuter
+//   - "тот" / "та" / "то" / "те" → "that"
+//   - "мой" and its declined forms → "mine"
 //
-// Returns the matching pronoun type for cross-referencing with prior slots.
+// Returns the matching pronoun class for cross-referencing with prior slots.
 func (AnaphoraResolver) Resolve(text string) (ref string, ok bool) {
 	s := strings.ToLower(strings.TrimSpace(text))
 	toks := strings.Fields(s)

internal/router/stage0.go

@@ -292,16 +292,15 @@ func narrativeQueryBuild(m []string) (Decision, bool) {
 	if chatNarrativeTopics.MatchString(m[0]) {
 		return Decision{}, false
 	}
-	for _, t := range planTokens(topic) {
-		for _, v := range captureVerbs {
-			if t == v {
-				return Decision{}, false
-			}
+	toks := planTokens(topic)
+	for _, v := range captureVerbs {
+		if hasTok(toks, v) {
+			return Decision{}, false
 		}
-		for _, v := range entertainmentNouns {
-			if t == v {
-				return Decision{}, false
-			}
+	}
+	for _, v := range entertainmentNouns {
+		if hasTok(toks, v) {
+			return Decision{}, false
 		}
 	}
 	return Decision{