Export findings as markdown (Ctrl+E), and the journal that makes it true

The output of an RE session is what you worked out, and it was locked in a
.i64 that only IDA can read. Ctrl+E (or `drive export`, or the `export` RPC
verb) writes it out: your comments grouped by function with the line each
annotates, the names and prototypes you set, the types you declared.

**The hard part was provenance, and it needed a mechanism, not a filter.**
A database does not record WHO wrote a comment or a name. IDA's analyzer
sets `; switch 73 cases` and `; s1` with the same `set_cmt` a person uses,
and the ELF loader sets `elf_gnu_hash_nbuckets` and `File class: 64-bit`
the same way. Four probes, all negative: the FF_COMM flag is identical,
`get_cmt` returns them all, `generate_disasm_line` tags every one of them
COLOR_REGCMT (not COLOR_AUTOCMT), and they survive with auto-comments
switched off. A first cut filtered by shape and produced a report whose
first screen was ELF header trivia and `; jumptable ... case 99`.

So idatui journals its own edits (idatui/journal.py) into a netnode in the
database: it rides along in the .i64, it is still there next session, and
the report is then exactly what was done here -- 2 findings out of a
database carrying 693 other annotations. Recorded at the choke points in
edit_ctl (rename, name-address, comment, retype) and in the struct editor;
flushed on save, on export and on quit, so no edit pays a round trip.

Without a journal (a database worked on in the IDA GUI, or predating this)
the report falls back to filtering by shape -- dummy names, imports, loader
segments, the analyzer's stereotyped switch/jumptable strings -- and says
so in the document rather than claiming authorship it cannot prove.

idatui/findings.py splits gather (needs IDA) from render (does not), so the
formatting, grouping, sorting, escaping and the empty cases are tested
offline: tests/test_findings.py, 32 checks, no worker, 0.1s. The pilot
scenario covers the round trip that matters -- edit through the UI, export,
find it in the file, and reload the journal from the .i64.

Full suite: 842 passed, 0 failed, 51.2s.

1 files changed, 22 insertions, 0 deletions

diff --git a/docs/RPC.md b/docs/RPC.md
index d13e8cd..4e736f6 100644
--- a/docs/RPC.md
+++ b/docs/RPC.md
@@ -102,6 +102,7 @@ predicate so the returned state is final.
 | `xrefs` | — | `x`: open the xref picker. |
 | `symbols` | `query?` | Ctrl+N palette, optionally pre-typed. |
 | `structs` | — | Ctrl+T struct editor. |
+| `export` | `path?`, `types?=true` | write the session's findings as **markdown** and return `{path, comments, names, types, functions, bytes}`. Not typed through a prompt: the point of this verb is the file it leaves behind, so a driver gets the path back rather than a screenshot. Defaults to `<binary>.findings.md`. See *Findings export* below. |
 | `search` | `term`, `direction?=1` | `/` (or `?`) incremental search in the active code view. |
 | `select` | `index?` | in an open modal list (xrefs/symbols) choose the highlighted (or nth) item and activate it. |
 | `save` | — | Ctrl+S: persist the `.i64`. |
@@ -131,6 +132,27 @@ symbol file: each one costs a navigation (listing page + decompile) plus two
 prompt round-trips, i.e. tens of minutes for a few hundred symbols, where
 `rename_many` is one call and a few seconds.
 
+### Findings export
+
+`export` writes what the session **worked out** -- comments, names, prototypes
+and the types you declared -- as one markdown document.
+
+The interesting part is provenance. A `.i64` does not record *who* wrote a
+comment or a name: IDA's analyzer sets `; switch 73 cases` and `; s1` with the
+same `set_cmt` a person uses, the loader sets `elf_gnu_hash_nbuckets` and
+`File class: 64-bit` the same way, and the flags, `get_cmt` and even the colour
+tag in `generate_disasm_line` are identical for all of them. So idatui keeps its
+own **journal** (`idatui/journal.py`) of every edit it makes, in a netnode
+inside the database, and the report is built from that -- exact, and still there
+next session. Ask it on a database nobody journalled (worked on in the IDA GUI,
+or before this existed) and it falls back to filtering by shape and says so in
+the document.
+
+```sh
+python -m idatui.drive export                    # -> <binary>.findings.md
+python -m idatui.drive export /tmp/writeup.md
+```
+
 ### Movement (fast — bare keypresses, pump-only settle)
 | method | params | effect |
 |--------|--------|--------|