fix(channels): list archived members in a marked Archived group - #3203

…their own members section (#9320)

## Summary
Mobile kept offering archived people and agents as choices: Add members
(including adding an agent to a Solo chat), New DM, the `@` mention
chooser, Search › People and the Agents page. An archived agent that
shares a live agent's name also forced a qualifier onto the live one,
because names were told apart across both. The members sheet listed
archived members among live ones with nothing to mark them.

Now, matching desktop:
- Archived people and agents are left out of those choices. History
(messages, activity, profiles) still shows them.
- The members sheet moves archived members out of People and Agents into
their own "Archived · N" section after both: archived people, then
archived agents. Each row reads "Archived · Member" (or Agent) in place
of the role, status or "Working…" line. A screen reader reads it with
the name. The members preview on the channel info page (the first five
members above "See all") follows the same order and label.
- Nothing is hidden or marked while the community's archive list is
unknown or cannot be read, and you are never hidden from yourself.

### Related issue
None found. The desktop members dialog gets the same Archived section in
block/buzz-app#3203.

### Testing
Widget and provider tests cover each surface, the unknown-archive case,
the viewer rule and a community switch. Each test fails without its
change.

Android emulator, local relay, fictional names. Each archived person or
agent has a live namesake. History rows still show archived identities,
as intended.

**`@` mention chooser, typing "@sc" (Scout `qsfn` is archived)**

| Before | After |
| --- | --- |
| <img
src="https://github.com/user-attachments/assets/6693729c-66c1-4433-8a7b-4f0e948057ee"
width="320"> | <img
src="https://github.com/user-attachments/assets/eb4f80be-780e-4dbe-8b2b-e6a5b6c3ca97"
width="320"> |

**`@` mention chooser, typing "@ca" (Casey Lee `9mhy` is archived)**

| Before | After |
| --- | --- |
| <img
src="https://github.com/user-attachments/assets/b6d409cd-7af1-4da7-b5b9-deece5e21de5"
width="320"> | <img
src="https://github.com/user-attachments/assets/60e21387-791b-4233-b8e6-1a29f94e6810"
width="320"> |

**Add members, searching "Morgan" (Morgan Reyes `ssc2` is archived)**

| Before | After |
| --- | --- |
| <img
src="https://github.com/user-attachments/assets/1222a923-5e43-4263-843d-57564bdc7af3"
width="320"> | <img
src="https://github.com/user-attachments/assets/dbe58278-788d-4a89-83bf-f0b4bc119c5e"
width="320"> |

**Add members, searching "Atlas" (Atlas `85gl` is archived)**

| Before | After |
| --- | --- |
| <img
src="https://github.com/user-attachments/assets/55c67a21-4cf5-47c5-b6ac-1ba80d68a3ec"
width="320"> | <img
src="https://github.com/user-attachments/assets/54b19ab3-fa2f-4933-8b67-1056d6e3b3a4"
width="320"> |

**New DM, no query yet**

| Before | After |
| --- | --- |
| <img
src="https://github.com/user-attachments/assets/6a26fd49-4a06-47bd-ba37-37e5898ab344"
width="320"> | <img
src="https://github.com/user-attachments/assets/3f33eb2b-f27a-4528-91c0-ac76d3fdf44b"
width="320"> |

**New DM, searching "Morgan"**

| Before | After |
| --- | --- |
| <img
src="https://github.com/user-attachments/assets/22d2d617-3074-4910-8c39-e0778e47a879"
width="320"> | <img
src="https://github.com/user-attachments/assets/fa00b160-e350-49af-94d0-beb15c357bef"
width="320"> |

**Search › People, "Morgan"**

| Before | After |
| --- | --- |
| <img
src="https://github.com/user-attachments/assets/83a28f2b-9b22-4d0c-8728-8a2dfb10e634"
width="320"> | <img
src="https://github.com/user-attachments/assets/573aed3f-75ab-478f-8c11-bedab5c6ce4f"
width="320"> |

**Agents page**

| Before | After |
| --- | --- |
| <img
src="https://github.com/user-attachments/assets/d7980f95-825c-4d1a-ad67-95f906a52e9a"
width="320"> | <img
src="https://github.com/user-attachments/assets/6252c38a-b2ec-48dc-ab4e-824ea29bbd85"
width="320"> |

**Channel info, members preview**

| Before | After |
| --- | --- |
| <img
src="https://github.com/user-attachments/assets/8744cdfd-c073-4ade-bd53-9d5e137cee60"
width="320"> | <img
src="https://github.com/user-attachments/assets/5240b1be-13d5-4f22-85a9-8375f1d8ac18"
width="320"> |

**Members sheet, top**

| Before | After |
| --- | --- |
| <img
src="https://github.com/user-attachments/assets/c9241478-99b1-452e-ad41-8c38fe080182"
width="320"> | <img
src="https://github.com/user-attachments/assets/3c6f9247-60c6-47df-94b0-9175f25805bb"
width="320"> |

**Members sheet, scrolled to the end**

| Before | After |
| --- | --- |
| <img
src="https://github.com/user-attachments/assets/7da7fcc8-28ea-4c7a-904e-91ca5a068d23"
width="320"> | <img
src="https://github.com/user-attachments/assets/024f676e-8150-457d-b7d0-67fa1a680f8d"
width="320"> |

## Details
- The archive reader (the community's NIP-IA archive list, signed by the
relay's NIP-11 `self` key) moves from `shared/me` to
`shared/identity_archives`, since it is no longer Solo-only.
`hiddenArchivedIdentitiesProvider` is the single rule the surfaces read.
- Pulling to refresh on the Agents page also rereads the archive list.
Other views reuse the last list, as on desktop; it is also reread on
reconnect and when the agent inventory changes.
- A refresh keeps the last known list. After a community or account
switch, the previous community's list does not apply: nobody is hidden
until the new list arrives.
- The shared chooser drops archived identities before names are
compared, which covers Add members, New DM and mentions.
- Search › People asks the relay for 24 people and shows the first 8
that are not archived, so archived matches do not push live people out.
- The channel info preview shows the label on one line, so with a long
name the role after "Archived" can be cut off. A screen reader still
reads it in full.
- Not changed: typing a full `@Name` by hand (without the chooser) still
resolves against archived channel members too, so an archived namesake
can still make a typed name ambiguous. Picking from the chooser is
unaffected. Possible follow-up.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Signed-off-by: Logan Johnson <[email protected]>
Co-authored-by: Larry <627498bd4bd1f281a16431e3c6cce3b5c25b6692798c78672298aefbf2f8f8b5@buzz.block.builderlab.xyz>
Co-authored-by: Claude Opus 5.5 <[email protected]>