More ergonomic Zig/Emacs API

[emil-e]

Summary

• Replace call0/call1/... with env.f("func-name", .{args}) — a single variadic call that auto-converts Zig types to Emacs values
• Unify signalError/logError to take format args directly; both auto-prepend ghostel: and use Emacs format syntax (%s)
• Add convenience wrappers: env.set, env.symbolValue, env.list, env.cons
• Reformat bindFunction docstrings to multiline string literals for readability
• Alphabetize interned symbol list

Test plan

• zig build passes
• Existing terminal functionality works (redraw, input, kitty graphics)

[emil-e]

@claude Check it out

[dakra]

@claude review

[claude]

Claude finished @dakra's task in 4m 14s —— View job

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Review

Nice cleanup — the variadic env.f("name", .{args}) plus auto-converting makeValue make module.zig and Renderer.zig substantially easier to read, and folding the *f-suffixed log/error helpers into a single signature is a clear win. CLAUDE.md/AGENTS.md were updated in lockstep, which is great.

Findings (one bug, two nits) posted as inline comments:

• BUG — src/emacs.zig:329 env.message calls self.toFunctionArgs(objects), which doesn't exist. Only safe because the function is generic and currently unused; first caller will break the build. Easy fix: use makeValues like format does, or drop the wrapper.
• NIT — src/emacs.zig:321 signalError (and logError) declare msg: anytype, but the body's "ghostel: " ++ msg requires comptime. Make it comptime msg: []const u8 to match intent. Also, signalError still calls self.intern("error") even though "error" was just added to the intern cache — sym.@"error" would skip the redundant lookup and stay consistent with the rest of the file.
• NIT — src/input.zig:47 keeps an intermediate env.makeString that env.f now handles automatically; the sibling call at line 106 was already cleaned up. Pass the slice directly.

No concerns on the bindFunction multiline docstrings, the SymbolCache generator, or the [*:0]const u8 coercion from multi-line string literals. Did not run zig build (no Zig toolchain in this environment) — recommend confirming the build/tests locally per the PR's own checklist.
· emil-e/better-zig-emacs