fix: resolve retired/preview gemini model routing and test configuration errors

internal/server/server.go

@@ -1,12 +1,13 @@
 package server
 
 import (
-	"encoding/json"
 	"context"
+	"encoding/json"
 	"fmt"
 	"io"
 	"log"
 	"net/http"
+	"regexp"
 	"strings"
 	"sync"
 	"time"
@@ -57,7 +58,9 @@ func NewServer(cfg *config.Config, database *db.DB) *Server {
 		if err != nil {
 			fmt.Printf("Warning: Failed to fetch initial model registry: %v\n", err)
 		} else {
+			s.registryMu.Lock()
 			s.registry = registry
+			s.registryMu.Unlock()
 		}
 	}()
 
@@ -976,12 +979,14 @@ func (s *Server) buildRouteContextFromChat(req models.ChatCompletionRequest) *ro
 		strings.Contains(msgLower, "explain in detail")
 
 	routeCtx := &router.RouteContext{
-		UserMessage:         userMessage,
-		InputTokens:         inputTokens,
-		HasMultimodalInput:  hasMultimodal,
-		RequiresToolCalling: requiresToolCalling,
-		RequiresReasoning:   requiresReasoning,
+		UserMessage:           userMessage,
+		InputTokens:           inputTokens,
+		HasMultimodalInput:    hasMultimodal,
+		RequiresToolCalling:   requiresToolCalling,
+		RequiresReasoning:     requiresReasoning,
+		IsSoftwareDevelopment: isSoftwareDevelopment(userMessage),
 	}
+	log.Printf("[DEBUG] RouteContext built: msg=%q, IsSoftwareDevelopment=%v", userMessage, routeCtx.IsSoftwareDevelopment)
 	routeCtx.Tags = s.getRouteCtxTags(routeCtx)
 	return routeCtx
 }
@@ -1034,12 +1039,14 @@ func (s *Server) buildRouteContextFromResponses(req models.ResponsesRequest) *ro
 		strings.Contains(msgLower, "explain in detail")
 
 	routeCtx := &router.RouteContext{
-		UserMessage:         userMessage,
-		InputTokens:         inputTokens,
-		HasMultimodalInput:  hasMultimodal,
-		RequiresToolCalling: requiresToolCalling,
-		RequiresReasoning:   requiresReasoning,
+		UserMessage:           userMessage,
+		InputTokens:           inputTokens,
+		HasMultimodalInput:    hasMultimodal,
+		RequiresToolCalling:   requiresToolCalling,
+		RequiresReasoning:     requiresReasoning,
+		IsSoftwareDevelopment: isSoftwareDevelopment(userMessage),
 	}
+	log.Printf("[DEBUG] RouteContext built: msg=%q, IsSoftwareDevelopment=%v", userMessage, routeCtx.IsSoftwareDevelopment)
 	routeCtx.Tags = s.getRouteCtxTags(routeCtx)
 	return routeCtx
 }
@@ -1102,3 +1109,35 @@ func (s *Server) getRouteCtxTags(routeCtx *router.RouteContext) []string {
 
 	return tags
 }
+
+var (
+	modelStripRegex    = regexp.MustCompile(`(?i)\b[a-z0-9/._:-]*(code|coder|codex)[a-z0-9/._:-]*\b`)
+	memoryContextRegex = regexp.MustCompile(`(?s)<memory-context>.*?</memory-context>`)
+	softwareDevRegex   = regexp.MustCompile(`(?i)\b(code|coding|programmer|programming|software|refactor|refactoring|compile|compiling|compiler|git|github|debug|debugging|repository|repo|unittest|unit test|test suite|test case|test cases|pull request|merge conflict|syntax error|source code|python|golang|javascript|typescript|ruby|php|perl|swift|kotlin|scala|rustlang|bash|powershell|sql|script|snippet|api|endpoint|patch|diff)\b`)
+)
+
+func isSoftwareDevelopment(userMessage string) bool {
+	msgLower := strings.ToLower(userMessage)
+	sanitized := memoryContextRegex.ReplaceAllString(msgLower, "")
+	sanitized = modelStripRegex.ReplaceAllString(sanitized, "")
+
+	if strings.Contains(sanitized, "script") {
+		nonCodingScriptTerms := []string{
+			"speaker script", "dialogue script", "movie script", "theatre script",
+			"theater script", "script writing", "script writer", "video script",
+			"audio script", "podcast script", "script for Kayla", "script for the",
+		}
+		hasNonCodingScript := false
+		for _, term := range nonCodingScriptTerms {
+			if strings.Contains(sanitized, strings.ToLower(term)) {
+				hasNonCodingScript = true
+				break
+			}
+		}
+		if hasNonCodingScript {
+			sanitized = strings.ReplaceAll(sanitized, "script", "")
+		}
+	}
+
+	return softwareDevRegex.MatchString(sanitized)
+}