Fix Space startup: install.sh deps + remove stray src/lakonlab gitlink

- install.sh: pin setuptools<82 (82 dropped pkg_resources, breaking
mmcv/mmgen source builds) and use --no-build-isolation so they compile
against the installed torch + setuptools
- install lakonlab with --no-deps (piFlow's own reqs conflict with my_req.txt)
and drop the -e editable flag that caused an interactive prompt -> EOFError
- align torch to my_req.txt (2.7.1) to avoid ABI mismatch in compiled exts
- remove accidental src/lakonlab gitlink (mode 160000, no .gitmodules)

install.sh

@@ -1,5 +1,32 @@
 #!/bin/bash
+set -e
 
-pip install torch==2.6.0 torchvision==0.21.0
-pip install -e git+https://github.com/Lakonik/piFlow.git@b1ef16e5e305251bccdfeac2a0e3d0ef339b974a#egg=lakonlab
-pip install -r my_req.txt
+# --- Build prerequisites -----------------------------------------------------
+# setuptools 82 (released 2026-02-08) removed the legacy `pkg_resources` module,
+# which breaks the source builds of mmcv / mmgen (their setup.py still imports
+# it). Keep a pre-82 setuptools, plus the tools needed to build native exts.
+pip install "setuptools<82" wheel ninja
+
+# Install torch first, at the SAME versions pinned in my_req.txt, so mmcv/mmgen
+# are compiled against the exact torch used at runtime (otherwise their compiled
+# extensions raise ABI / "undefined symbol" errors), and torch isn't downloaded
+# twice.
+pip install torch==2.7.1 torchvision==0.22.1
+
+# --- piFlow (lakonlab) -------------------------------------------------------
+# Install ONLY the `lakonlab` package, not piFlow's own dependencies: piFlow's
+# requirements.txt pins (gradio 4.x, transformers 4.54, diffusers 0.35, ...)
+# conflict with this Space's curated my_req.txt below. Dependencies are provided
+# by my_req.txt instead.
+#
+# Also drop the `-e` (editable) flag: an editable VCS install clones into
+# ./src/lakonlab and, when that path already exists, pip falls back to an
+# interactive prompt ("(i)gnore/(w)ipe/(b)ackup") -> EOFError in the container.
+pip install --no-deps \
+  "lakonlab @ git+https://github.com/Lakonik/piFlow.git@b1ef16e5e305251bccdfeac2a0e3d0ef339b974a"
+
+# --- Remaining dependencies --------------------------------------------------
+# Disable build isolation so mmcv/mmgen build against the torch + setuptools<82
+# installed above, instead of a fresh isolated build env that would pull the
+# pkg_resources-less setuptools 82.
+pip install --no-build-isolation -r my_req.txt

src/lakonlab

@@ -1 +0,0 @@
-Subproject commit b1ef16e5e305251bccdfeac2a0e3d0ef339b974a