feat(telegram): add AI agent bot with streaming and account context

- Add Telegram bot with long-polling and AI agent loop (api_call tool)
- SSE streaming with real-time message editing and ⏳ placeholder
- Account state injection at conversation start (models, exchanges,
  strategies, traders, per-trader PnL and statistics)
- Lane semaphore per chat serializes concurrent messages (60s timeout)
- Idle timeout watchdog (60s) prevents hung streaming connections
- Look-ahead buffer prevents partial <api_call> tag leaking to user
- Fix PUT /strategies/:id to merge config (read-then-merge pattern)
- Add route registry with full API schema for LLM documentation
- Add TelegramConfig store and Web UI config modal
- Add GetAnyEnabled to AIModel store for bot LLM client selection

api/route_registry.go

@@ -0,0 +1,66 @@
+package api
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+// RouteDoc holds documentation for a single API route.
+type RouteDoc struct {
+	Method      string
+	Path        string
+	Description string
+	Schema      string // optional: full parameter/body schema documentation
+}
+
+// routeRegistry stores all documented routes. Populated via s.route() calls in setupRoutes.
+var routeRegistry []RouteDoc
+
+// route registers an HTTP route with a one-line description.
+func (s *Server) route(g *gin.RouterGroup, method, path, description string, h gin.HandlerFunc) {
+	s.routeWithSchema(g, method, path, description, "", h)
+}
+
+// routeWithSchema registers an HTTP route with full parameter schema documentation.
+// schema is injected verbatim into the API docs seen by the LLM.
+func (s *Server) routeWithSchema(g *gin.RouterGroup, method, path, description, schema string, h gin.HandlerFunc) {
+	fullPath := strings.TrimSuffix(g.BasePath(), "/") + "/" + strings.TrimPrefix(path, "/")
+	routeRegistry = append(routeRegistry, RouteDoc{
+		Method:      method,
+		Path:        fullPath,
+		Description: description,
+		Schema:      schema,
+	})
+	switch method {
+	case "GET":
+		g.GET(path, h)
+	case "POST":
+		g.POST(path, h)
+	case "PUT":
+		g.PUT(path, h)
+	case "DELETE":
+		g.DELETE(path, h)
+	}
+}
+
+// GetAPIDocs returns formatted API documentation for injection into the LLM system prompt.
+// Routes with schema documentation include full parameter details.
+func GetAPIDocs() string {
+	var sb strings.Builder
+	for _, r := range routeRegistry {
+		sb.WriteString(fmt.Sprintf("%-8s %s\n", r.Method, r.Path))
+		sb.WriteString(fmt.Sprintf("         %s\n", r.Description))
+		if r.Schema != "" {
+			// Indent each schema line for readability
+			for _, line := range strings.Split(strings.TrimSpace(r.Schema), "\n") {
+				sb.WriteString("         ")
+				sb.WriteString(line)
+				sb.WriteByte('\n')
+			}
+		}
+		sb.WriteByte('\n')
+	}
+	return sb.String()
+}