tui: one shared field editor, in-place form editing, value-only focus

Forms edit fields in place in the value column instead of a bottom
prompt, highlight only the focused value and scroll when taller than the
screen; long text scrolls horizontally instead of wrapping. Fixes: typing
after Backspace/Del no longer wipes the field, 'q' is text in row tables,
the caret resets between cells, dialogs decode arrow keys, full buffers
never take half a UTF-8 character, an invalid amount stays editable.

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

1 files changed, 46 insertions, 0 deletions

diff --git a/scripts/tui-golden.py b/scripts/tui-golden.py
index 4fee4df..9d6e9ca 100755
--- a/scripts/tui-golden.py
+++ b/scripts/tui-golden.py
@@ -61,6 +61,8 @@ KEYS = {
     "f5": "\x1b[15~",
     "f9": "\x1b[20~",
     "f2": "\x1bOQ",
+    "backspace": "\x7f",
+    "tab": "\t",
 }
 
 # {org_name} {org_nr} {fy_label} {fy_start} {fy_end} are substituted at run
@@ -540,6 +542,50 @@ SCENARIOS = [
             },
         ],
     },
+    {
+        # Backspace in a freshly opened field edits the value; the next
+        # key must not replace everything.
+        "name": "form-edit-backspace",
+        "screen": "customers",
+        "steps": [
+            {
+                "keys": ["ctrln"],
+                "expect": ["Ny kund", "<UTKAST>"],
+            },
+            {
+                "keys": ["enter", "Bakstegskund", "enter"],
+                "expect": ["Bakstegskund"],
+            },
+            {
+                "keys": ["enter", "backspace", "x", "enter"],
+                "expect": ["Bakstegskunx"],
+            },
+        ],
+    },
+    {
+        # Typing on a header field edits it in place; 'q' is text in both
+        # header fields and cells, never "back".
+        "name": "voucher-form-typing",
+        "screen": "vouchers",
+        "steps": [
+            {
+                "keys": ["ctrln"],
+                "expect": ["Nytt verifikat", "Datum", "Konto"],
+            },
+            {
+                "keys": ["20260315", "enter"],
+                "expect": ["Nytt verifikat", "2026-03-15"],
+            },
+            {
+                "keys": ["down", "Qliro q", "enter"],
+                "expect": ["Nytt verifikat", "Qliro q"],
+            },
+            {
+                "keys": ["1930", "tab", "tab", "tab", "equity q"],
+                "expect": ["Nytt verifikat", "1930", "equity q"],
+            },
+        ],
+    },
 ]
 
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