feat(tui+lsp): TUI theme system, streaming phase 0, LSP subsystem, and report panel polish #553

Job	Run time
check	1m 4s
release-validate	9s
test (3.12)	8m 35s
nix-test (ubuntu-22.04, x86_64-unknown-linux-gnu, dist/pythinker)	1m 39s
build (windows-2025-vs2026, x86_64-pc-windows-msvc, dist/onefile/pythinker.exe, true)	3m 43s
build (ubuntu-22.04-arm, aarch64-unknown-linux-gnu, dist/onefile/pythinker)	2m 19s
nix-test (ubuntu-22.04-arm, aarch64-unknown-linux-gnu, dist/pythinker)	1m 29s
test (3.14)	9m 15s
build (windows-2022, x86_64-pc-windows-msvc, dist/onefile/pythinker.exe)	3m 16s
nix-test (macos-14, aarch64-apple-darwin, dist/pythinker)	3m 17s
build (ubuntu-22.04, x86_64-unknown-linux-gnu, dist/onefile/pythinker)	2m 55s
test (3.13)	9m 30s
build (macos-14, aarch64-apple-darwin, dist/onefile/pythinker)	2m 14s
	49m 25s

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