jerry/buzz

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chiller 5ff83d82f8 fix(desktop): address workflow deletions at the workflow's actual owner (#2669 )

Fixes #2671.

## Problem

Deleting an agent-created workflow from the desktop app appears to
succeed, but the workflow keeps running and stays in the list. Since
workflows are commonly created by agents, this makes most workflows
undeletable from the UI.

## Root Cause

`delete_workflow` builds the NIP-09 `a`-tag coordinate with the
**caller's** pubkey:

```rust
let builder = events::build_workflow_delete(&workflow_id, &current_pubkey_hex(&state)?)?;
```

kind:30620 is addressable by `(author, d-tag)`. For an agent-created
workflow, `30620:<caller>:<workflow-id>` names a record that does not
exist. The relay accepts the kind:5 (a self-addressed delete always
passes validation) and deletes nothing; the UI reports success.

Observed live: a delete of an agent-owned workflow produced
`["a","30620:<human-pubkey>:<workflow-uuid>"]` while the kind:30620
event is authored by the agent — the coordinate can never match.

## Fix

Fetch the workflow's kind:30620 event first (the same `#d` query
`update_workflow` already uses) and build the coordinate from the
event's author. Relay-side validation already authorizes the owning
human for agent-authored coordinates via `is_agent_owner`. Deleting an
unknown workflow id now surfaces `workflow not found` instead of
silently publishing an unmatchable delete.

This is the client half of the fix. The relay half is #2242: today the
relay executes a-tag deletions scoped by the delete's signer, so a
human-signed delete of an agent workflow still no-ops server-side.
Without this change, #2242 alone won't help desktop users, because the
client addresses a record that doesn't exist. Together they make delete
work end to end.

Related but deliberately not included: deleted workflows leaving their
kind:30620 event queryable (ghost list entries) is #2390, with a
relay-side fix open in #1340.

## Validation

- `cargo test` in `desktop/src-tauri`: 1617 passed, 0 failed, 14
ignored.
- `cargo clippy --all-targets` and `cargo fmt --check`: clean.
- Live repro against the hosted relay: the stock client's kind:5 for an
agent-owned workflow named the signer in the coordinate; the relay
returned `accepted: true` and the workflow remained live and kept
firing.
- With the fix: the delete event carries
`30620:<agent-pubkey>:<workflow-id>`; an owner-signed deletion of that
exact coordinate was verified to remove the workflow record.

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2026-10-06 14:24:15 -07:00