Chat: a GIF picker kept family-friendly, sharing a place, and Signal conversations in the Chat list

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

README.md

@@ -148,6 +148,7 @@ playing an episode or pressing the button still works. Settings -> Health shows
 
 - **Podcast discovery**: *Add podcast* searches Apple's free directory and, when `PODCASTINDEX_KEY` and `PODCASTINDEX_SECRET` are set (a free key from podcastindex.org), Podcast Index too, with topic buttons (News, History, Science...) that list trending shows. A feed in both appears once.
 - **Search what's said** (Podcast screen): finds a word or phrase in every transcript on the server and plays that episode from that moment. Only podcasts on your own list (and audiobooks) are searched; older transcripts are matched to their episode the first time.
+- **Chat extras**: a **GIF** button (set `TENOR_API_KEY` or `GIPHY_API_KEY`; the hub does all the talking to the service, asks only for G-rated results, refuses searches and drops results containing words that could bring up adult material, keeps a sent GIF in the chat like a photo, and a sender or admin can delete one that slips through), **Place or location** (your phone's location after it asks, or a search through OpenStreetMap; shared as a map card that opens the phone's maps app), and the Chat list also shows **Signal** conversations, labelled, on screens where Signal is available.
 - **Recipes** (needs `MEALIE_TOKEN`; `MEALIE_URL` defaults to `https://mealie.necloud.us`): browse and search your Mealie recipes, read one (ingredients, steps, times), import a recipe from a web link, and add its ingredients to the Mealie shopping list (Mealie adds up repeats). The shopping list is also kept in **Tasks** as a "Shopping" list: ticking, adding or deleting an item in either place is carried over when either screen opens or an item changes. In a recipe, tick ingredients (and tap steps) as you go; this is remembered on the device, with *Uncheck all* to start over. On wide screens the ingredients sit beside the steps. Turn the tab on per person in the admin screen.
 - **Contacts**: an address book per person (name, company, emails, phones, address, birthday, notes). Mail suggests contacts while you type a recipient, a message you are reading can be saved as a contact (or opens the one you have), birthdays appear in the Calendar, and .vcf files from iCloud, Google or a phone can be imported and exported.