fix: increase speaker, TTS, and media volume defaults

[kiwipaulrob]

Problem

The voice assistant and media playback volumes were too low to be clearly audible. Three issues combined to cause this:

1. Broken speaker initialisation — configure.sh used amixer sset 'Speaker' 94% which silently fails on the WM8960 (as noted in CLAUDE.md, this control requires cset numid=13).

2. Hardware speaker below maximum — numid=13 was set to 122,122 in two places. The range is 0–127 (127 = +5 dB), leaving 5 dB unused for no reason.

3. Conservative software defaults — TTS at 90% and media at 75% compounded the hardware issue.

Changes

File | Change -- | -- configure.sh | Fix broken sset 'Speaker' 94% → cset numid=13 127,127 configure.sh | audio-init + labwc autostart: 122,122 → 127,127 configure.sh | Default TTS volume: 90 → 100 configure.sh | Default media volume: 75 → 90 mqtt-bridge.py | Fallback TTS default: 90 → 100 mqtt-bridge.py | Fallback media default: 75 → 90 CLAUDE.md | Docs updated to reflect new values

Quick fix for existing installs

amixer -c seeed2micvoicec cset numid=13 127,127 -q

[kiwipaulrob]

Greetings. A present from my AI (Tasklet) to your AI.

Thanks for great work

[kiwipaulrob]

and...

| configure.sh | State file seed: TTS 90→100, Media 75→90 |