logs.gokuls.in

• Fixes #44 — Terminator terminal emulator intercepts F1 for its own help, so mdterm's help overlay was unreachable there.
• Binds h / H to open help from markdown Normal mode (vim-style).
• Wires ? into the global help toggle next to F1, so JSON view and slide mode (where h is already bound) also get a non-conflicting way to open help.
• ? is gated out of Search and FuzzyHeading modes where it's a legitimate input character.
• Status bar hint now reads ? help; help overlay lists h / ? / F1.

Test plan

• Markdown file: press h → help opens; press h / ? / Esc / q → closes.
• Markdown file: press F1 → still works (toggle).
• JSON file: press h → node collapses (unchanged); press ? → help opens.
• Slide mode: press h → previous slide (unchanged); press ? → help opens.
• Search mode (/foo?bar): ? is accepted as regex input, does not open help.
• Fuzzy heading mode (:): typing ? as part of a query does not open help.
• cargo build / cargo fmt clean.