fix(#5759): match composer-focus chord on '/' char not physical Slash code

The Cmd/Ctrl+/ predicate keyed off e.code==='Slash' + !e.shiftKey, which on
QWERTZ layouts (a) stole Ctrl/Cmd+- browser zoom-out (physical Slash there is
the minus/zoom key) and (b) missed the real shifted-'/' chord. Match e.key==='/'
instead — layout-correct on every keyboard. Tests updated to assert the physical
code isn't used and a layout-shifted '/' still matches.

Co-authored-by: nesquena-hermes <agent@nesquena-hermes>

static/boot.js

@@ -2321,7 +2321,11 @@ document.addEventListener('keydown',async e=>{
     }
   }
   // Cmd/Ctrl+/ focuses the message composer without creating a chat.
-  if((e.metaKey||e.ctrlKey)&&!e.altKey&&!e.shiftKey&&(e.key==='/'||e.code==='Slash')){
+  // Match on the '/' CHARACTER (e.key), not the physical key position: on QWERTZ
+  // layouts the physical Slash key produces Ctrl+- (browser zoom-out) and '/' is
+  // typed as Shift+7, so matching the physical code both steals zoom and misses
+  // the real '/' chord. e.key==='/' is layout-correct on every keyboard.
+  if((e.metaKey||e.ctrlKey)&&!e.altKey&&e.key==='/'){
     const t=e.target;
     const isText=t&&(t.tagName==='INPUT'||t.tagName==='TEXTAREA'||t.isContentEditable);
     if(isText) return;

tests/test_issue5759_composer_focus_shortcut.py

@@ -4,7 +4,7 @@ from pathlib import Path
 
 
 BOOT_JS = (Path(__file__).parent.parent / "static" / "boot.js").read_text(encoding="utf-8")
-CHORD = "(e.metaKey||e.ctrlKey)&&!e.altKey&&!e.shiftKey&&(e.key==='/'||e.code==='Slash')"
+CHORD = "(e.metaKey||e.ctrlKey)&&!e.altKey&&e.key==='/'"
 CTRL_K = "(e.metaKey||e.ctrlKey)&&e.key==='k'"
 
 
@@ -34,8 +34,11 @@ def _ctrl_k_branch() -> str:
 
 def test_composer_focus_chord_uses_cmd_ctrl_slash_and_stays_before_ctrl_k():
     assert CHORD in BOOT_JS
-    assert "&&e.altKey&&!e.shiftKey&&(e.key==='/'||e.code==='Slash')" not in BOOT_JS
-    assert "e.code==='Slash'" in BOOT_JS
+    # Must key off the '/' CHARACTER, never the physical Slash code — on QWERTZ
+    # the Slash key produces Ctrl+- (browser zoom-out) and '/' is Shift+7.
+    assert "e.code==='Slash'" not in BOOT_JS
+    # No shiftKey exclusion — a layout-shifted '/' (e.g. Shift+7) must still match.
+    assert "!e.shiftKey&&e.key==='/'" not in BOOT_JS
     assert BOOT_JS.index("(e.metaKey||e.ctrlKey)&&!e.shiftKey&&!e.altKey&&(e.key==='b'||e.key==='B')") < BOOT_JS.index(CHORD)
     assert BOOT_JS.index(CHORD) < BOOT_JS.index(CTRL_K)