feat: add Vim-style word search

docs/editing.md

@@ -40,7 +40,7 @@ Indicators refresh asynchronously. Typing and undo/redo retain the last complete
 | Normal | `d<count>w` / `d<count>b` delete forward/backward word spans, e.g. `d2w` / `d2b` |
 | Normal | `c<count>w` / `c<count>b` cut the same line-local spans as `d` and enter Insert, e.g. `c2w` / `c2b` |
 | Normal, Visual | `.` repeats the last successful native edit against the current targets; one undo group |
-| Normal | `/` opens search; `n` finds the next match; `N` (Shift+n) finds the previous match |
+| Normal | `/` opens search; `*` searches the word under the primary caret; `n`/`N` find the next/previous match |
 | Normal | `v` starts characterwise Visual; `V` starts linewise Visual; `p`/`P` paste the configured clipboard after/before each caret or row for linewise fragments (system by default); Esc keeps only the primary caret |
 | Normal, Visual | Ctrl+k clones above; Ctrl+e clones below |
 | Visual | Cursor/word motions and `n`/`N` extend every selection; `y` copies; `d`/`x`/Delete cuts; `c` changes; `v`/`V` switches shape, the same selector or Esc cancels |
@@ -172,6 +172,10 @@ The last recipe is session-wide across buffers, but pending Insert groups and un
 
 Search is case-sensitive and single-line, with no regular expressions or Unicode normalization. Matches start and end on whole grapheme boundaries, including combining marks and emoji. Next/previous navigation skips the current position and wraps through the buffer; a sole match wraps back to itself. The active match is highlighted yellow.
 
+Normal `*` searches forward for the primary caret's word and highlights the destination in one action. It uses the same Unicode letters/digits/underscore boundaries as `w`, so `cat` skips `scatter`, `cat_cat`, and `cat2`. If the caret is not on a keyword, it takes the next keyword on that line; with none, it uses the punctuation run under or after the caret as a literal substring. A blank remainder reports no word and preserves the previous search. Counts such as `2*` skip to the requested occurrence; every caret searches the primary word from its own position. This also works in read-only diff text. Bind `config.core.search_word` to remap it.
+
+`n`/`N` and an empty `/` submission retain the whole-word setting; a nonempty `/` query returns to literal substring search. Cancelling `/` preserves both the previous query and its matching behavior.
+
 Submitting an empty search repeats the last query. Esc cancels without moving the cursor or replacing the previous query/match. A missing match reports the query, clears the highlight, and leaves the cursor unchanged; searching without a previous query also leaves the cursor unchanged. Search never edits text or adds undo history. Buffer edits and undo/redo clear the highlight but retain the query, so subsequent navigation searches the current text again.
 
 ## Commands, saving, and pasted input