feat(ui): replace app-menu logo with a quick-access file toolbar

Remove the OCS-logo button and the dropdown menu it opened; the top strip
now shows direct New / Open / Save / Save As / Print buttons ahead of the
undo/redo controls. Drop the HELP and OPTIONS commands (HELP dumped text to
the command line, OPTIONS aliased the drafting-settings popup).

The app-menu overlay is gone, so its rendering code, MENU_ITEMS, four dead
messages, and the LOGO_RED / GEAR / HELP assets are removed. The recents
list it held is the only survivor — moved into OpenCADStudio.recent_files
via a new app/recent.rs, backing the Start page's Recent Documents panel.

Quick-access icons are redrawn in a cleaner style (file-plus, folder-open,
device-floppy, file-export, printer) and tinted light so they read on the
dark strip; FOLDER / DOC keep their old glyphs for the file browser.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/commands/display.rs

@@ -154,9 +154,9 @@ impl OpenCADStudio {
             "POLAR" => {
                 return Some(Task::done(Message::TogglePolar));
             }
-            // DSETTINGS / OSNAP / OPTIONS — open the drafting-settings popup, which
-            // is OCS's settings surface (the persisted DYN/ORTHO/POLAR/OSNAP prefs).
-            "DSETTINGS" | "OSNAP" | "OPTIONS" | "OP" => {
+            // DSETTINGS / OSNAP — open the drafting-settings popup, which is OCS's
+            // settings surface (the persisted DYN/ORTHO/POLAR/OSNAP prefs).
+            "DSETTINGS" | "OSNAP" => {
                 return Some(Task::done(Message::ToggleSnapPopup));
             }
             // UNITS — open the drawing-units picker (linear / angular format).

src/app/commands/view.rs

@@ -3,25 +3,6 @@ use super::*;
 impl OpenCADStudio {
     pub(super) fn dispatch_view(&mut self, cmd: &str, i: usize) -> Option<Task<Message>> {
         match cmd {
-            "HELP" | "?" => {
-                self.command_line.push_output(
-                    "Draw: LINE CIRCLE ARC PLINE RECTANG(RECT) POLYGON(POLY) POINT ELLIPSE SPLINE RAY XLINE HATCH DONUT REVCLOUD WIPEOUT MLINE ATTDEF  |  \
-                     Modify: MOVE COPY ROTATE SCALE MIRROR ERASE OFFSET EXTEND FILLET CHAMFER STRETCH EXPLODE TRIM BREAK JOIN LENGTHEN ALIGN PEDIT  |  \
-                     Array: ARRAY ARRAYRECT ARRAYPOLAR ARRAYPATH  |  \
-                     Text: TEXT MTEXT LEADER MLEADER  |  \
-                     Dimension: DIMLINEAR DIMALIGNED DIMANGULAR DIMRADIUS DIMDIAMETER DIMCONTINUE DIMBASELINE  |  \
-                     Annotation: TOLERANCE  |  \
-                     Inquiry: DIST ID AREA LIST FIND FINDALL COUNT QSELECT  |  Draw on entity: DIVIDE MEASURE  |  \
-                     Attributes: ATTEDIT ATTDISP  |  \
-                     Utilities: FLATTEN LAYISO LAYUNISO  |  \
-                     View: ZOOM EXTENTS ZOOM WINDOW VIEW LIST/SAVE/RESTORE/DELETE  |  \
-                     Layer: LAYER LIST/NEW/ON/OFF/FREEZE/THAW/LOCK/UNLOCK/COLOR/SET  |  \
-                     Viewport: MVIEW VPLAYER VPORTS MS PS DRAWORDER  |  \
-                     Tables: STYLE DIMSTYLE LINETYPE UCS RENAME PURGE  |  \
-                     File: NEW OPEN SAVE SAVEAS PRINT PURGE UNDO REDO"
-                );
-            }
-
             "DONATE" => {
                 crate::sys::open_url("https://patreon.com/HakanSeven12");
                 self.command_line.push_info("Opening Patreon page...");