Create categories and tags in place from every assignment picker

Category and tag inputs across the transaction editor, Analyse
corrections, and merchant defaults now mint missing entries without a
detour through the registry pages. A bare name lands under the kind's
root, "Parent / Name" targets that parent, and typing an existing name
selects it instead of duplicating. Enter only creates when nothing
matches, server rejections surface inline in the dropdown, and
assignment pickers offer leaf categories only — the shape the server
validates.

Mutations now return the accepted state so callers can select the id
the server just minted, and the revision-keyed remounts on Transactions
and the registry pages are gone: they closed the open modal and threw
away pending edits the moment any in-modal creation committed.

web/src/Classification.tsx

@@ -16,7 +16,9 @@ import type {
 } from "./api";
 import { categoryPath, money, request } from "./api";
 import {
+  CategoryCombobox,
   Combobox,
+  createTag,
   DateField,
   Empty,
   ErrorMessage,
@@ -24,12 +26,15 @@ import {
   Modal,
   ModelOptions,
 } from "./ui";
+import type { Mutate } from "./ui";
 export function Classification({
   state,
   acceptState,
+  mutate,
 }: {
   state: State;
   acceptState: (state: State, message?: string) => void;
+  mutate: Mutate;
 }) {
   const dates = state.data.transactions.map((t) => t.facts.booking_date).sort();
   const [from, setFrom] = useState(dates[0] || "");
@@ -482,6 +487,7 @@ export function Classification({
                           value={effective(change)}
                           edited={change.id in edits}
                           disabled={busy}
+                          mutate={mutate}
                           onChange={(value) => correct(change, value)}
                         />
                       </div>
@@ -667,14 +673,18 @@ interface CorrectionValue {
 }
 // CorrectionEditor is the "Proposed" side of a review row, editable in place.
 // Category and tags are free-text inputs that autocomplete against the
-// existing taxonomy; the category list is limited to leaves of the change's
-// kind because that is what validation will accept.
+// existing taxonomy and can create a missing entry in place; the category
+// list is limited to leaves of the change's kind because that is what
+// validation will accept. Creating mid-review bumps the journal revision,
+// which the apply path tolerates as long as the transactions themselves are
+// untouched.
 function CorrectionEditor({
   data,
   change,
   value,
   edited,
   disabled,
+  mutate,
   onChange,
 }: {
   data: Dataset;
@@ -682,15 +692,9 @@ function CorrectionEditor({
   value: CorrectionValue;
   edited: boolean;
   disabled: boolean;
+  mutate: Mutate;
   onChange: (value: CorrectionValue) => void;
 }) {
-  const categories = data.categories
-    .filter(
-      (c) =>
-        c.kind === change.after.kind &&
-        !data.categories.some((child) => child.parent_id === c.id),
-    )
-    .map((c) => ({ value: c.id, label: categoryPath(data, c.id) }));
   const addable = data.tags
     .filter((t) => !value.tag_ids.includes(t.id))
     .map((t) => ({ value: t.id, label: t.name }));
@@ -728,13 +732,14 @@ function CorrectionEditor({
         <div>
           <dt>Category</dt>
           <dd>
-            <Combobox
-              options={categories}
+            <CategoryCombobox
+              data={data}
+              kind={change.after.kind}
+              leavesOnly
+              mutate={mutate}
               value={value.category_id}
               disabled={disabled}
               onChange={(category_id) => onChange({ ...value, category_id })}
-              placeholder="Search categories"
-              emptyText="No matching category. Create it in Categories first."
             />
           </dd>
         </div>
@@ -763,16 +768,32 @@ function CorrectionEditor({
               <Combobox
                 options={addable}
                 value=""
-                disabled={disabled || !addable.length}
+                disabled={disabled}
                 onChange={(id) =>
                   onChange({ ...value, tag_ids: [...value.tag_ids, id] })
                 }
-                placeholder={
-                  data.tags.length
-                    ? "Add tag"
-                    : "No tags yet — create them in Tags"
+                placeholder={data.tags.length ? "Add tag" : "Add or create tag"}
+                emptyText="No matching tag. Type a name to create it."
+                create={(text) =>
+                  data.tags.some(
+                    (t) => t.name.toLowerCase() === text.toLowerCase(),
+                  )
+                    ? []
+                    : [
+                        {
+                          key: "tag",
+                          label: `Create tag "${text}"`,
+                          run: async () =>
+                            onChange({
+                              ...value,
+                              tag_ids: [
+                                ...value.tag_ids,
+                                await createTag(mutate, data, text),
+                              ],
+                            }),
+                        },
+                      ]
                 }
-                emptyText="No matching tag. Create it in Tags first."
               />
             </div>
           </dd>