feat: externalize apps/analysis to Gitea repos, add analysis table

- Migration 007: repo_url on apps table + analysis table with FTS5
- Analysis struct, parser, CRUD, validation, hash computation
- Selective purge: remote-only apps/analysis preserved across fn index
- CLI: fn app list/clone/pull, fn analysis list/clone/pull
- search/show/list now include analysis results
- Apps removed from git tracking (content lives in Gitea repos)
- .gitkeep for apps/ and analysis/ dirs
- Bash functions: jupyter analysis pipeline, shell utilities
- Browser domain: CDP functions moved from infra to browser

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

functions/browser/cdp_wait_element.go

@@ -0,0 +1,38 @@
+package browser
+
+import (
+	"fmt"
+	"time"
+)
+
+// CdpWaitElement espera hasta que un selector CSS exista en el DOM.
+// Hace polling con Runtime.evaluate hasta que el elemento aparezca o se agote el timeout.
+// Retorna error si el timeout se agota sin encontrar el elemento.
+func CdpWaitElement(c *CDPConn, selector string, timeout time.Duration) error {
+	if c == nil {
+		return fmt.Errorf("cdp wait element: conexion nula")
+	}
+	if timeout <= 0 {
+		timeout = 10 * time.Second
+	}
+
+	deadline := time.Now().Add(timeout)
+	interval := 200 * time.Millisecond
+
+	js := fmt.Sprintf(`document.querySelector(%q) !== null`, selector)
+
+	for time.Now().Before(deadline) {
+		result, err := CdpEvaluate(c, js)
+		if err != nil {
+			// Error en evaluate — puede que la pagina aun no este lista
+			time.Sleep(interval)
+			continue
+		}
+		if result == "true" {
+			return nil
+		}
+		time.Sleep(interval)
+	}
+
+	return fmt.Errorf("cdp wait element: selector %q no encontrado despues de %s", selector, timeout)
+}