feat: 4 tools nuevas + browser_list enriquecido

Tools nuevas (wrappers finos sobre funciones del registry functions/browser):
- page_collect_console  -> cdp_collect_console (console + exceptions + log, snapshot)
- page_pdf              -> cdp_print_pdf (Page.printToPDF a archivo)
- dom_select_option     -> cdp_select_option (<select> por value/texto + input/change)
- dom_set_files         -> cdp_set_file_input (subir archivos a <input type=file>)

browser_list ahora enriquece cada master con CDP con pages (nº de page targets),
active_title y active_url via GET /json (best-effort: si el puerto no responde
los campos quedan a cero y el listado de procesos no falla).

Total tools: 46 -> 50.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tools_lifecycle.go

@@ -16,6 +16,8 @@ import (
 
 	"github.com/mark3labs/mcp-go/mcp"
 	"github.com/mark3labs/mcp-go/server"
+
+	"fn-registry/functions/browser"
 )
 
 // registerLifecycleTools wires the per-profile Chromium lifecycle tools:
@@ -55,7 +57,10 @@ type chromiumMaster struct {
 	UserDataDir string `json:"user_data_dir"` // value of --user-data-dir
 	CDPPort     string `json:"cdp_port"`      // value of --remote-debugging-port ("" if none)
 	HasCDP      bool   `json:"has_cdp"`
-	Headless    bool   `json:"headless"` // true if launched with --headless / --headless=new / --headless=old
+	Headless    bool   `json:"headless"`               // true if launched with --headless / --headless=new / --headless=old
+	Pages       int    `json:"pages"`                  // count of "page" targets (best-effort via GET /json; 0 if no CDP or unreachable)
+	ActiveTitle string `json:"active_title,omitempty"` // title of the first "page" target
+	ActiveURL   string `json:"active_url,omitempty"`   // URL of the first "page" target
 }
 
 // parseCmdline turns the raw bytes of /proc/<pid>/cmdline into argv.
@@ -271,7 +276,7 @@ type browserListArgs struct{}
 
 func browserListTool() mcp.Tool {
 	return mcp.NewTool("browser_list",
-		mcp.WithDescription("List the running Chromium MASTER processes (one per user-data-dir master, NOT zygote/gpu/renderer children). For each: pid, profile (--profile-directory value), user_data_dir, cdp_port (--remote-debugging-port value, empty if none), has_cdp, headless (true if launched with --headless). Returns a JSON array. Read-only."),
+		mcp.WithDescription("List the running Chromium MASTER processes (one per user-data-dir master, NOT zygote/gpu/renderer children). For each: pid, profile (--profile-directory value), user_data_dir, cdp_port (--remote-debugging-port value, empty if none), has_cdp, headless (true if launched with --headless), pages (count of open page targets via GET /json, best-effort), active_title/active_url (first open page). Returns a JSON array. Read-only."),
 	)
 }
 
@@ -283,10 +288,43 @@ func (d *deps) handleBrowserList(_ context.Context, _ mcp.CallToolRequest, _ bro
 	if masters == nil {
 		masters = []chromiumMaster{}
 	}
+	// Enriquecer cada master con CDP con su nº de páginas y la primera página
+	// (título/URL) consultando GET /json. Best-effort: si el puerto no responde,
+	// se dejan los campos a cero — el listado de procesos nunca falla por esto.
+	for i := range masters {
+		enrichMasterTabs(&masters[i])
+	}
 	b, _ := json.MarshalIndent(masters, "", "  ")
 	return mcp.NewToolResultText(string(b)), nil
 }
 
+// enrichMasterTabs rellena Pages/ActiveTitle/ActiveURL de un master consultando
+// sus targets CDP por HTTP. No devuelve error: cualquier fallo (sin CDP, puerto
+// caído, timeout) deja los campos en su cero y el master se reporta igual.
+func enrichMasterTabs(m *chromiumMaster) {
+	if m.CDPPort == "" {
+		return
+	}
+	port, err := strconv.Atoi(m.CDPPort)
+	if err != nil {
+		return
+	}
+	tabs, err := browser.CdpListTabs("localhost", port)
+	if err != nil {
+		return
+	}
+	for _, t := range tabs {
+		if t.Type != "page" {
+			continue
+		}
+		m.Pages++
+		if m.ActiveURL == "" {
+			m.ActiveTitle = t.Title
+			m.ActiveURL = t.URL
+		}
+	}
+}
+
 // ---- browser_launch_profile (MUTA) ----
 
 type launchProfileArgs struct {