Potential fix for code scanning alert no. 28: Multiplication result converted to larger type - #732

…amule-project#732)

connButImg() carried ~300 lines of raw XPM/pixel data for the 3 states
of the per-tab Connect/Cancel/Disconnect button (ServerWnd, KadDlg),
manually rescaled and cached in ScaledConnButImg(). The SVG assets for
all 3 states (toolbar_connect/_disconnect/_connecting) already existed
in src/icons/ and were already compiled into icon_data.c, but nothing
referenced them.

Mapping verified against SetConnectButtonState's existing switch (the
button shows the icon for the action it performs): default/off state
("Connect" label) -> toolbar_connect, connected ("Disconnect" label)
-> toolbar_disconnect, connecting ("Cancel" label) -> toolbar_connecting.

SetConnectButtonState now looks the art up via wxArtProvider::
GetBitmapBundle(), same pattern already used for the status-bar and
main-toolbar icons (amuleDlg.cpp). This also drops the manual
rescale-cache: CreateBitmapBundle() rasterizes the SVG straight at the
requested 16x16 logical size on demand, so there's no more raster ->
ConvertToImage -> Rescale round-trip to cache against.

Verified via a full `amule` build (macOS) after the change, and a
clang-format v18 (Docker, pinned per project convention) pass -- diff
is otherwise clean, only the intended lines touched.

…or tab-close (amule-project#675) (amule-project#735)

* feat(gui): migrate Friends/Messages headers, reload buttons, folder tree, and tab-close icons to CamuleArtProvider

Continues the icon-system cleanup scoped in amule-project#675, independent of
amule-project#732/amule-project#733 (different files, no overlap).

- amuleDlgImages(14)/(15): the small header icons in the Friends and
  Messages tabs. Friends gets a new "amule:friends" SVG; Messages
  reuses the existing "amule:toolbar_messages" art, requested at an
  explicit 16x16 so it doesn't inherit the toolbar's 32x32 natural
  size.
- amuleDlgImages(18)/(30): the "reload list" buttons (shared files,
  ED2K server list, Kad node list) -- three call sites, one new
  "amule:reload" SVG (see below for its own history).
- amuleSpecial(1)/(2): the shared-directory tree's folder icons get
  new "amule:folder"/"amule:folder_shared" SVGs -- same shape, tinted
  orange vs. red, matching how the original raw bitmaps only differed
  by colour.
- amuleSpecial(3)/(4): the chat/search notebook tabs' close-on-hover
  icon, replaced with wx's own stock wxART_CLOSE for both states
  instead of a second bespoke asset (both were the same "X in a box"
  bitmap, differing only by a hover-highlight border colour).

reload.svg's own history, per PR review: the first hand-drawn attempt
(thin blue single arc) didn't match the original at all -- got3nks
caught it, I reconstructed the original amuleDlgImages(18) raster to
check (a thicker green double-arrow circle) and redrew closer to that,
which still wasn't good enough. Final version is AI-vectorized via
Recraft (through the Higgsfield MCP), which got3nks preferred over
further hand-drawn iterations.

src/icons/icon_data.c (the checked-in fallback used when Python3 is
absent at configure time, per amule-project#487) regenerated via embed_icons.py to
match.

Rebased onto current master (picking up amule-project#732/amule-project#733/amule-project#739, which all
touch the same amuleSpecial/amuleDlgImages functions) -- conflicts
resolved by redoing the index deletions against the current tree
rather than replaying the stale patch, since amule-project#725/amule-project#733 already moved
the surrounding line numbers.

Verified via a full amule build (macOS) and a visual check of every
call site: Friends/Messages tab headers, the ED2K server-list and Kad
node-list reload buttons, the shared-files reload button, and the
Preferences > Directory shared-folder tree.

* fix(gui): thicker reload stroke, dedicated message-bubble icon (amule-project#735 review)

got3nks, testing amule-project#735:
- reload: arrow bodies read too thin at 16px. Regenerated via Recraft
  with an explicit thicker/bolder-stroke prompt.
- Messages panel header: reusing "amule:toolbar_messages" (the main
  toolbar's detailed gradient mascot bust) at 16x16 doesn't read as
  "messages" once shrunk that far from its 32x32 native size. Added a
  dedicated "amule:message" chat-bubble glyph instead, sized for
  legibility at 16x16 specifically, and pointed the Messages panel
  header at it instead of the toolbar art.

Folder/folder_shared and the tab-close X were already approved as-is.

Verified via a full amule build (macOS) and a visual check of both
fixes: the shared-files reload button and the Messages panel header.