Fix Linux/Windows bridge_example: skip 32-bit wheels + link Windows abi3 stub

Three CI failures from the previous run, all in the Linux + Windows
bridge_example matrix:

Linux:
  Picked the wrong wheel — cibuildwheel produces both x86_64 AND i686
  variants for ubuntu hosts, and `ls | head -n1` lands on
  dart_bridge-*manylinux*_i686.whl alphabetically. pip then refuses
  with "is not a supported wheel on this platform".
  Fix: skip i686 in [tool.cibuildwheel] so only x86_64 ships. (Also
  pre-emptively skip win32 for symmetry; Flet desktop is 64-bit only.)

Windows:
  `LINK : fatal error LNK1104: cannot open file 'python314_d.lib'` —
  find_package(Python3 ... Development.Module) picks the version-
  specific debug-config import lib in Debug builds, but python-build-
  standalone for Windows doesn't ship a Debug variant.
  Fix: native/CMakeLists.txt — on WIN32, link against python3.lib (the
  abi3 stable-ABI stub) directly. It's version-agnostic and has no
  debug variant requirement, matching our Py_LIMITED_API choice in
  dart_bridge.c.

iOS (separate flake):
  iOS 3.14 passed in 12m26s but iOS 3.12 and 3.13 hung past 1 hour in
  the "Package + run integration test" step. Adding timeout-minutes:
  25 to both bridge_example_ios in ci.yml and test_bridge_example_ios
  in the throwaway so future hangs fail loudly within 25 min instead
  of consuming the 6-hour job default. Root cause TBD — likely a
  CocoaPods/simulator zombie since one of three Python versions
  succeeded.

Author: FeodorFitsner

.github/workflows/ci.yml

@@ -269,6 +269,7 @@ jobs:
   bridge_example_ios:
     name: Test bridge example on iOS (Python ${{ matrix.python_version }})
     runs-on: macos-latest
+    timeout-minutes: 25
     strategy:
       fail-fast: false
       matrix:

.github/workflows/test-bridge-build.yml

@@ -147,6 +147,7 @@ jobs:
   test_bridge_example_ios:
     name: Bridge example iOS round-trip (Python ${{ matrix.python_version }})
     runs-on: macos-latest
+    timeout-minutes: 25
     strategy:
       fail-fast: false
       matrix:

src/serious_python_bridge/native/CMakeLists.txt

@@ -18,7 +18,17 @@ project(flet_bridge VERSION 0.0.1 LANGUAGES C)
 if(NOT DEFINED FLET_BRIDGE_PYTHON_INCLUDE_DIRS)
   find_package(Python3 REQUIRED COMPONENTS Development.Module)
   set(FLET_BRIDGE_PYTHON_INCLUDE_DIRS ${Python3_INCLUDE_DIRS})
-  set(FLET_BRIDGE_PYTHON_LIBRARIES Python3::Module)
+  if(WIN32)
+    # Python3::Module picks pythonXY.lib (or pythonXY_d.lib in Debug builds),
+    # but python-build-standalone for Windows doesn't ship a Debug variant
+    # so Flutter's debug builds fail with LNK1104. Link the abi3 stable-ABI
+    # stub python3.lib instead — it's version-agnostic AND has no debug
+    # variant requirement (matches our Py_LIMITED_API choice).
+    get_filename_component(_flet_bridge_python_root "${Python3_INCLUDE_DIRS}" DIRECTORY)
+    set(FLET_BRIDGE_PYTHON_LIBRARIES "${_flet_bridge_python_root}/libs/python3.lib")
+  else()
+    set(FLET_BRIDGE_PYTHON_LIBRARIES Python3::Module)
+  endif()
 endif()
 
 add_library(flet_bridge SHARED

src/serious_python_bridge/python/pyproject.toml

@@ -31,4 +31,6 @@ Issues = "https://github.com/flet-dev/serious-python/issues"
 # Limited API / abi3: a single wheel built against Python 3.12's stable ABI
 # loads on any Python 3.12+ minor version, so we only need cp312-* here.
 build = "cp312-*"
-skip = ["pp*", "*-musllinux_*"]
+# Flet targets only 64-bit desktop, so skip 32-bit (i686 / win32). Also skip
+# PyPy and musllinux (alternative libc, not what python-build-standalone uses).
+skip = ["pp*", "*-musllinux_*", "*-linux_i686", "*-win32"]