feat(navi): deployment profiles + /api/config endpoint

Add profile-driven config infrastructure:
- config/profiles/{home,regional_pi,minimal_pi}.yaml templates
- lib/deployment_config.py loader (reads RECON_PROFILE env var)
- GET /api/config returns active profile as JSON (5min cache)

Frontend reads this on startup to determine tile source, defaults,
and feature flags. No existing behavior changed.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

config/profiles/home.yaml

@@ -0,0 +1,31 @@
+# Deployment profile: Home (VM 1130)
+# Active on the main Echo6 deployment. Full stack with planet-scale NA tiles.
+# Override via RECON_PROFILE env var in /etc/systemd/system/recon.service
+
+profile: home
+region_name: "North America"
+
+tileset:
+  url: "/tiles/na.pmtiles"
+  bounds: [-168, 14, -52, 72]
+  max_zoom: 15
+  attribution: "Protomaps © OSM"
+
+services:
+  geocode: "/api/geocode"
+  reverse: "/api/reverse"
+  address_book: "/api/address_book"
+  valhalla: "/valhalla"
+
+features:
+  has_nominatim_details: false
+  has_kiwix_wiki: false
+  has_hillshade: false
+  has_3d_terrain: false
+  has_traffic_overlay: false
+  has_landclass: false
+  has_address_book_write: false
+
+defaults:
+  center: [42.5736, -114.6066]
+  zoom: 10

config/profiles/minimal_pi.yaml

@@ -0,0 +1,31 @@
+# Deployment profile: Minimal Pi (single-state pocket deployment)
+# Template for the lightest possible field kit — Idaho only.
+# Override via RECON_PROFILE env var.
+
+profile: minimal_pi
+region_name: "Idaho"
+
+tileset:
+  url: "/tiles/idaho.pmtiles"
+  bounds: [-117.5, 42.0, -111.0, 49.0]
+  max_zoom: 15
+  attribution: "Protomaps © OSM"
+
+services:
+  geocode: "/api/geocode"
+  reverse: "/api/reverse"
+  address_book: "/api/address_book"
+  valhalla: "/valhalla"
+
+features:
+  has_nominatim_details: false
+  has_kiwix_wiki: false
+  has_hillshade: false
+  has_3d_terrain: false
+  has_traffic_overlay: false
+  has_landclass: false
+  has_address_book_write: true
+
+defaults:
+  center: [44.0, -114.0]
+  zoom: 7

config/profiles/regional_pi.yaml

@@ -0,0 +1,31 @@
+# Deployment profile: Regional Pi (multi-state field kit)
+# Template for a Raspberry Pi covering Idaho + surrounding states.
+# Override via RECON_PROFILE env var.
+
+profile: regional_pi
+region_name: "Idaho + Neighbors"
+
+tileset:
+  url: "/tiles/regional.pmtiles"
+  bounds: [-125, 40, -104, 49]
+  max_zoom: 15
+  attribution: "Protomaps © OSM"
+
+services:
+  geocode: "/api/geocode"
+  reverse: "/api/reverse"
+  address_book: "/api/address_book"
+  valhalla: "/valhalla"
+
+features:
+  has_nominatim_details: false
+  has_kiwix_wiki: false
+  has_hillshade: true
+  has_3d_terrain: false
+  has_traffic_overlay: false
+  has_landclass: true
+  has_address_book_write: true
+
+defaults:
+  center: [44.0, -114.0]
+  zoom: 7

lib/api.py

@@ -24,6 +24,7 @@ from werkzeug.utils import secure_filename
 
 from .utils import get_config, content_hash, clean_filename_to_title, derive_source_and_category, generate_download_url, setup_logging
 from .status import StatusDB
+from .deployment_config import get_deployment_config
 
 logger = setup_logging('recon.api')
 
@@ -1165,6 +1166,15 @@ def api_knowledge_stats():
     return jsonify(_cache['knowledge_stats'])
 
 
+@app.route('/api/config')
+def api_config():
+    """Return deployment profile config for frontend consumption."""
+    config = get_deployment_config()
+    resp = jsonify(config)
+    resp.headers['Cache-Control'] = 'public, max-age=300'
+    return resp
+
+
 @app.route('/api/health')
 def api_health():
     """Health check endpoint for monitoring."""

lib/deployment_config.py

@@ -0,0 +1,46 @@
+"""
+Deployment profile loader.
+
+Reads RECON_PROFILE env var (default: "home"), loads the matching YAML
+from config/profiles/<profile>.yaml, and caches the parsed dict in memory.
+Provides get_deployment_config() for use by the /api/config endpoint.
+"""
+import os
+import yaml
+from .utils import setup_logging
+
+logger = setup_logging('recon.deployment_config')
+
+_config_cache = None
+
+
+def load_deployment_config():
+    """Load and cache the deployment profile. Called once at import time."""
+    global _config_cache
+
+    profile = os.environ.get('RECON_PROFILE', 'home')
+    config_dir = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'config', 'profiles')
+    config_path = os.path.join(config_dir, f'{profile}.yaml')
+
+    if not os.path.exists(config_path):
+        raise FileNotFoundError(
+            f"Deployment profile '{profile}' not found at {config_path}. "
+            f"Available profiles: {', '.join(f.replace('.yaml','') for f in os.listdir(config_dir) if f.endswith('.yaml'))}"
+        )
+
+    with open(config_path, 'r') as f:
+        _config_cache = yaml.safe_load(f)
+
+    logger.info(f"Loaded deployment profile: {profile} ({_config_cache.get('region_name', 'unknown')})")
+    return _config_cache
+
+
+def get_deployment_config():
+    """Return the cached deployment config dict."""
+    if _config_cache is None:
+        load_deployment_config()
+    return _config_cache
+
+
+# Load on import so startup fails fast if profile is missing
+load_deployment_config()