Tone down tmux opinions; remove custom bindings

[frenck]

Proposed Changes

SSIA; compromise towards close #980

Summary by CodeRabbit

Chores

• Updated tmux configuration - Status bar styling changed, keyboard shortcuts modified, and mouse interaction settings adjusted for terminal sessions.

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[coderabbitai]

Walkthrough

The tmux configuration file is simplified by removing custom keybindings, custom prefix settings, and copy-mode mouse bindings while retaining the conditional mouse support logic based on TTYD presence.

Changes

Cohort / File(s)	Summary
Tmux Configuration ssh/rootfs/root/.tmux.conf	Removed custom prefix (C-a), associated keybindings, pane/window split bindings, and copy-mode mouse bindings. Simplified status-style using consolidated status-style parameter. Retained mouse detection logic for TTYD absence scenarios.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A rabbit's whisper on the config line,
Unbind this, unbind that—simplicity's design!
Less is more, the wise bunny says,
Let users hop their own tmux maze! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Linked Issues check	❓ Inconclusive	The PR partially addresses issue #980 by removing custom bindings and reducing tmux opinions, but leaves the full configuration file intact rather than removing it entirely.	Clarify whether this is a compromise step toward full removal or if the remaining configuration changes align with the issue's intent to eliminate all default tmux tweaks.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and concisely summarizes the main change: removing custom tmux bindings and reducing opinionated defaults.
Out of Scope Changes check	✅ Passed	All changes are within scope: they directly relate to reducing tmux configuration opinions and removing custom bindings as described in issue #980.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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