feat: main.cpp intenta HTTP API primero, fallback a SQLite

Nuevo flujo: por defecto conecta a sqlite_api en localhost:8484.
Si la API no responde, cae a SQLite directo. Flag --api para URL
custom. Launcher PowerShell actualizado con --api. app.md refleja
la nueva arquitectura dual HTTP/SQLite y dir_path del proyecto.

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

app.md

@@ -2,8 +2,8 @@
 name: registry_dashboard
 lang: cpp
 domain: tui
-description: "Dashboard ImGui para visualizar el estado del fn_registry: KPIs, charts, tablas, desglose por lenguaje/dominio/pureza"
+description: "Dashboard ImGui para visualizar el estado del fn_registry. Consume datos via sqlite_api HTTP (fallback a SQLite directo). KPIs, charts, tablas, desglose por lenguaje/dominio/pureza."
-tags: [dashboard, imgui, visualization, registry]
+tags: [dashboard, imgui, visualization, registry, http]
 uses_functions:
   - kpi_card_cpp_viz
   - bar_chart_cpp_viz
@@ -17,24 +17,27 @@ uses_functions:
 uses_types: []
 framework: "imgui"
 entry_point: "main.cpp"
-dir_path: "apps/registry_dashboard"
+dir_path: "projects/fn_monitoring/apps/registry_dashboard"
 repo_url: "https://gitea-dgg044oo04woo4ggcsws4gk0.organic-machine.com/dataforge/registry_dashboard"
 ---
 
 ## Arquitectura
 
-Dashboard C++ que lee `registry.db` directamente via SQLite C API y visualiza el estado completo del fn_registry.
+Dashboard C++ con dos modos de acceso a datos:
 
-**Data layer** (`data.cpp`): Carga todas las stats, desgloses y listas en un solo paso desde SQLite. Soporte para reload en caliente.
+1. **HTTP API** (primario): Conecta a `sqlite_api` via HTTP para obtener datos de registry.db. No requiere acceso al filesystem.
+2. **SQLite directo** (fallback): Lee registry.db directamente si la API no esta disponible.
+
+**Data layers:**
+- `data_http.cpp`: Carga datos via HTTP POST a sqlite_api (cpp-httplib + nlohmann/json)
+- `data.cpp`: Carga directa desde SQLite C API
 
 **Views** (`views.cpp`): Compone funciones del registry C++ para renderizar:
-- 6 KPI cards: total functions, types, apps, analysis, tested%, pure%
+- 8 KPI cards: functions, types, apps, analysis, unit tests, proposals, tested%, pure%
-- Bar charts: funciones por lenguaje, por dominio, actividad ultimos 30 dias
+- Bar charts: funciones por lenguaje, por dominio
-- Pie charts: pureza (pure/impure), kind (function/pipeline/component), tested/untested
+- Pie charts: pureza (pure/impure), kind (function/pipeline/component)
 - Tablas: ultimas 20 funciones, apps, analysis, tipos
 
-**Entrada**: Paths a `registry.db` como argumentos con fallback encadenado.
-
 ## Build
 
 ```bash
@@ -48,23 +51,37 @@ cd cpp && cmake -B build/windows -S . -DCMAKE_TOOLCHAIN_FILE=toolchains/mingw-w6
 ## Ejecucion
 
 ```bash
-# Linux
+# Via API (default, intenta conectar a localhost:8484)
-./cpp/build/linux/apps/registry_dashboard/registry_dashboard /home/lucas/fn_registry/registry.db
+./registry_dashboard
 
-# Windows (PowerShell) — intenta WSL mount, luego local
+# API explicita
+./registry_dashboard --api http://192.168.1.10:8484
+
+# Con SQLite fallback
+./registry_dashboard --api http://127.0.0.1:8484 /path/to/registry.db
+
+# Solo SQLite (sin API)
+./registry_dashboard /path/to/registry.db
+
+# Windows (PowerShell)
 .\registry_dashboard.ps1
-
-# Otra maquina — copiar .exe + .db al mismo dir
-registry_dashboard.exe .\registry.db
 ```
 
+## Dependencias vendored
+
+| Libreria | Version | Archivo |
+|----------|---------|---------|
+| cpp-httplib | v0.18.3 | vendor/httplib.h |
+| nlohmann/json | v3.11.3 | vendor/nlohmann/json.hpp |
+
 ## Roadmap
 
-- [ ] Integrar Go runtime (CGo) para ejecutar comandos `fn` desde el GUI
 - [ ] Filtros interactivos por lenguaje/dominio en sidebar
-- [ ] Busqueda FTS5 integrada
+- [ ] Busqueda FTS5 integrada via API
 - [ ] Detalles de funcion al hacer click en tabla
 
 ## Notas
 
-SQLite compilado estaticamente en Windows via amalgamation vendoreada. En Linux usa libsqlite3 del sistema.
+- Por defecto intenta conectar a sqlite_api en `http://127.0.0.1:8484`. Si falla, usa SQLite directo.
+- SQLite compilado estaticamente en Windows via amalgamation vendoreada. En Linux usa libsqlite3 del sistema.
+- cpp-httplib usa sockets nativos (no OpenSSL) — solo HTTP, no HTTPS.

main.cpp

@@ -2,22 +2,41 @@
 #include "imgui.h"
 #include "core/fullscreen_window.h"
 #include "data.h"
+#include "data_http.h"
 #include "views.h"
 
 #include <cstdio>
 #include <cstdlib>
+#include <cstring>
 #include <string>
 #include <fstream>
 
 static RegistryData g_data;
 static std::string g_db_path;
+static std::string g_api_url;
 static bool g_loaded = false;
+static bool g_using_http = false;
 
 static void reload_data() {
     g_data = RegistryData{};
-    g_loaded = load_registry_data(g_db_path.c_str(), g_data);
+
-    if (!g_loaded) {
+    // Try HTTP API first
-        fprintf(stderr, "Failed to load registry data from: %s\n", g_db_path.c_str());
+    if (!g_api_url.empty()) {
+        g_loaded = load_registry_data_http(g_api_url, g_data);
+        if (g_loaded) {
+            g_using_http = true;
+            return;
+        }
+        fprintf(stderr, "HTTP API failed, falling back to SQLite\n");
+    }
+
+    // Fallback to direct SQLite
+    g_using_http = false;
+    if (!g_db_path.empty()) {
+        g_loaded = load_registry_data(g_db_path.c_str(), g_data);
+        if (!g_loaded) {
+            fprintf(stderr, "Failed to load registry data from: %s\n", g_db_path.c_str());
+        }
     }
 }
 
@@ -30,11 +49,17 @@ static void render() {
     if (!g_loaded) {
         fullscreen_window_begin("##error");
         ImGui::TextColored(ImVec4(1, 0.3f, 0.3f, 1),
-            "Could not open registry.db");
+            "Could not load registry data");
         ImGui::Spacing();
-        ImGui::Text("Tried: %s", g_db_path.c_str());
+        if (!g_api_url.empty())
+            ImGui::Text("API: %s (unreachable)", g_api_url.c_str());
+        if (!g_db_path.empty())
+            ImGui::Text("DB: %s", g_db_path.c_str());
         ImGui::Spacing();
-        ImGui::TextWrapped("Usage: registry_dashboard <path1> [path2] [path3] ...");
+        ImGui::TextWrapped(
+            "Usage: registry_dashboard [--api URL] [db_path ...]\n"
+            "  --api URL   Connect to sqlite_api (default: http://127.0.0.1:8484)\n"
+            "  db_path     Direct SQLite path(s) as fallback");
         ImGui::Spacing();
         if (ImGui::Button("Retry")) {
             reload_data();
@@ -47,26 +72,46 @@ static void render() {
 }
 
 int main(int argc, char** argv) {
-    if (argc < 2) {
+    // Parse --api flag
-        fprintf(stderr, "Usage: registry_dashboard <db_path> [fallback_path ...]\n");
+    std::vector<std::string> db_candidates;
-        fprintf(stderr, "  Tries each path in order until one opens successfully.\n");
+    bool api_explicit = false;
-        return 1;
+
+    for (int i = 1; i < argc; i++) {
+        if (strcmp(argv[i], "--api") == 0 && i + 1 < argc) {
+            g_api_url = argv[++i];
+            api_explicit = true;
+        } else if (strncmp(argv[i], "--api=", 6) == 0) {
+            g_api_url = argv[i] + 6;
+            api_explicit = true;
+        } else {
+            db_candidates.push_back(argv[i]);
+        }
     }
 
-    // Try each argument in order
+    // Default: try localhost API if no --api given
-    for (int i = 1; i < argc; i++) {
+    if (!api_explicit) {
-        std::string candidate = argv[i];
+        g_api_url = "http://127.0.0.1:8484";
+    }
+
+    // Resolve SQLite fallback path
+    for (auto& candidate : db_candidates) {
         if (std::ifstream(candidate).good()) {
             g_db_path = candidate;
-            fprintf(stdout, "Using: %s\n", g_db_path.c_str());
+            fprintf(stdout, "SQLite fallback: %s\n", g_db_path.c_str());
             break;
         }
         fprintf(stderr, "Not found: %s\n", candidate.c_str());
     }
 
-    if (g_db_path.empty()) {
+    if (g_api_url.empty() && g_db_path.empty() && db_candidates.empty()) {
-        // None found, use last arg so error screen shows something useful
+        fprintf(stderr, "Usage: registry_dashboard [--api URL] [db_path ...]\n");
-        g_db_path = argv[argc - 1];
+        fprintf(stderr, "  --api URL   Connect to sqlite_api (default: http://127.0.0.1:8484)\n");
+        fprintf(stderr, "  db_path     Direct SQLite path(s) as fallback\n");
+        return 1;
+    }
+
+    if (g_db_path.empty() && !db_candidates.empty()) {
+        g_db_path = db_candidates.back();
     }
 
     reload_data();

registry_dashboard.ps1

@@ -1,5 +1,6 @@
 $exe = Join-Path $PSScriptRoot "registry_dashboard.exe"
 
+# Try API first (default), with SQLite fallback via WSL mount
 & $exe `
-    "\\wsl.localhost\Ubuntu-22.04\home\lucas\fn_registry\registry.db" `
+    --api "http://127.0.0.1:8484" `
-
+    "\\wsl.localhost\Ubuntu-22.04\home\lucas\fn_registry\registry.db"