Merge upstream/main into fix/taiwan-highway-cctv-fallback

.env.example

@@ -61,8 +61,15 @@ CESIUM_ION_TOKEN=
 # ChatGPT/Codex OAuth session; the browser still receives only a short-lived
 # Realtime client secret. Do not prefix with VITE_.
 OPENAI_API_KEY=
-# Optional: forbid API-key voice sessions. Select ChatGPT OAuth in Provider
-# Settings; missing or expired Codex sign-in then fails closed.
+# Typed chat uses Chat Completions, independently of the voice model. It can
+# only bill OPENAI_API_KEY, so GEV_PREFER_CODEX_OAUTH below turns it off.
+OPENAI_CHAT_MODEL=gpt-4.1-mini
+# Typed chat requests (/api/openai/chat) per IP per minute, counted apart from
+# voice. Unset, it takes GEV_RATELIMIT_OPENAI_PER_MIN's cap; 0 disables it.
+# Not a billing cap.
+# GEV_RATELIMIT_OPENAI_CHAT_PER_MIN=30
+# Optional: forbid API-key voice sessions and OpenAI typed chat. Select ChatGPT
+# OAuth in Provider Settings; missing or expired Codex sign-in then fails closed.
 # GEV_PREFER_CODEX_OAUTH=true
 OPENAI_REALTIME_MODEL=gpt-realtime-2
 # Cheaper voice tier, used when the GEV MIC panel's MINI toggle is on.
@@ -232,6 +239,8 @@ AISSTREAM_API_KEY=
 # CCTV_CALGARY_ROWS_URL=                               # override the Open Calgary catalog URL
 # CCTV_CATALONIA_ENABLED=1                             # set 0 to disable the Servei Català de Trànsit cameras
 # CCTV_CATALONIA_MAX_SOURCES=150                       # cap cameras loaded from Catalonia (~130 exist today)
+# CCTV_ICELAND_ENABLED=1                               # set 0 to disable the Vegagerðin (Iceland) road cameras
+# CCTV_ICELAND_MAX_SOURCES=250                         # cap cameras loaded from Iceland (~500 views exist today)
 # CCTV_HK_ENABLED=1                                   # set 0 to disable the Hong Kong Transport Department cameras
 # CCTV_HK_MAX_SOURCES=1100                            # cap cameras loaded from Hong Kong (~1,013 exist today); min 8, max 1200
 # CCTV_HK_CAMERAS_URL=                                # override the DATA.GOV.HK camera locations XML URL
@@ -257,6 +266,9 @@ AISSTREAM_API_KEY=
 # CCTV_TAIWAN_ENABLED=1                                # set 0 to skip Taiwan Freeway Bureau (MOTC) road cameras
 # CCTV_TAIWAN_MAX_SOURCES=600                          # cap Taiwan freeway cameras (1-2000); no API key required
 # CCTV_TAIWAN_URL=                                     # override the Freeway Bureau MOTC 2.0 CCTV.xml URL
+# CCTV_HOUSTON_ENABLED=                                # off by default; set 1 to load Houston TranStar cameras only if you hold TxDOT's written permission (TranStar's Content Usage terms prohibit copying, distributing or framing its images without it; see DATA_SOURCES.md)
+# CCTV_HOUSTON_MAX_SOURCES=250                         # cap cameras loaded from the Houston TranStar catalog (nearest metro cores first)
+# CCTV_HOUSTON_CAMERAS_URL=                            # override the Houston TranStar catalog URL
 # CCTV_A22_ENABLED=1                                   # set 0 to disable the Autostrada del Brennero (A22, Italy) webcams
 # CCTV_A22_URL=                                        # override the Open Data Hub A22 webcam catalog URL
 # CCTV_OTTAWA_ENABLED=1                                # set 0 to skip City of Ottawa cameras (also needs OTTAWA_CAMERA_CERTIFICATE)
@@ -269,6 +281,7 @@ AISSTREAM_API_KEY=
 # CCTV_FORCE_AUSTIN=                                   # force live default sources when a source-pack JSON is configured
 
 # Optional: comma-separated Overpass URLs; use only instances you run or pay for.
+# Also enables voice place search (osm_query, "hospitals in Kathmandu").
 OVERPASS_UPSTREAMS=
 
 # Optional: place-lookup endpoints. Lookups try bundled data first, then the
@@ -302,6 +315,12 @@ OVERPASS_UPSTREAMS=
 # Unset, no page may frame it. Other pages of the app can never be framed.
 # GEV_EMBED_FRAME_ANCESTORS=
 
+# Gemini typed chat uses generateContent; voice continues to use Gemini Live.
+GEMINI_CHAT_MODEL=gemini-3.5-flash-lite
+# Typed chat requests (/api/gemini/chat) per IP per minute. Unset, it takes
+# GEV_RATELIMIT_GEMINI_PER_MIN's cap (default 30); 0 disables it.
+# GEV_RATELIMIT_GEMINI_CHAT_PER_MIN=30
+
 # Optional keyless Radio Browser coverage: up to 8 ISO alpha-2 countries.
 # Each reserves up to 40 stations within the existing 750-station directory.
 # Restart after changing. Leave blank for the existing global selection.