feat: add tx edit and tx delete (v0.3.0)HEADv0.3.0master

Implements ISSUES.md #1, the missing other half of an import tool:
correcting and removing mis-imported transactions without the web UI.

- tx edit <id>: PATCH a single-split journal; only the fields passed are
  sent (--amount/--date/--desc/--from/--to/--category/--tags/--type). Errors
  if no field is given. Accounts resolve to ids; category/tags pass raw.
- tx delete <id>: requires --yes (no interactive prompt, agent-first);
  prints {"deleted": "<id>"} on success.

Also fix gen_completion.py: running it as a script put scripts/ on
sys.path[0] and imported the installed (stale) firefly_cli, so the
generated completion drifted (missing account balance/get, tx get/search).
Prepend the repo root so the documented regen command uses this tree. The
regenerated completion now reflects the full command surface.

MINOR bump per the contract-keyed scheme: new commands, no breaking change.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/scripts/gen_completion.py b/scripts/gen_completion.py
index a97f26b..4714bf1 100644
--- a/scripts/gen_completion.py
+++ b/scripts/gen_completion.py
@@ -8,8 +8,14 @@ No drift: groups, leaves, and per-leaf flags are read straight off the
 argparse subparsers the registry builds.
 """
 import argparse
+import os
+import sys
 from collections import defaultdict
 
+# Run from the repo, not any installed copy: prepend the repo root so
+# `python scripts/gen_completion.py` imports this tree, not a stale install.
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
 from firefly_cli import registry
 import firefly_cli.commands  # noqa: F401  triggers registration