fix: i18n key path errors, locale drift, and TUI/CLI correctness fixes

[h2o502]

fix: i18n key path errors, locale drift, and TUI/CLI correctness fixes

Summary

Static analysis of the fork found a cluster of user-facing bugs: several TUI
screens render raw i18n key paths instead of text, the Astron settings panel
is completely untranslated (and gets wiped by unrelated config saves), the
/workflow help prints undefined, and an 80 ms footer timer runs forever
once thinking effort is enabled.

All fixes are minimal, behavior-preserving except where the current behavior
is objectively wrong. Every t() key used in the touched files was
machine-verified to resolve in both en and zh runtime locales
(locales/*.ts), with placeholder parity.

Bugs fixed

1. i18n key paths pointing at non-existent locations (raw keys shown in UI)

File	Wrong prefix	Correct prefix	Count
tui/commands/config.ts	tui.dialogs.config.configXxx	tui.messages.configXxx	41
migration/migration-screen.ts, migration/badge.ts	migration.X	tui.migration.X	34
tui/components/dialogs/coding-plan-config.ts	codingPlan.X	tui.codingPlan.X	12

The Rust translation engine falls back to returning the key itself, so the
config/migration/coding-plan screens currently display strings like
tui.dialogs.config.configThemeSet to users.

2. Astron settings panel untranslated + locale drift

astron-settings.ts references 14 keys under tui.dialogs.astronSettings.*
that exist in locales/*.json but were never synced into the runtime
locales/*.ts sources — the whole panel renders raw key paths. Also missing
in *.ts: settingsSelector.astron/astronDesc and
messages.configAstronSaveFailed (17 keys total, EN+ZH). Reverse drift:
tui.chrome.footer.swarmPlan existed only in *.ts; added to *.json.
en.json/zh.json ↔ en.ts/zh.ts are now fully in sync.

3. Malformed placeholder in zh locale

zh unsupportedEffort contained {{arg} (missing closing }}) — the value
would render literally. Fixed in both zh.ts and zh.json.

4. /workflow usage prints undefined

workflow.ts did t('tui.slashCommands.workflowHelp') as Record<string, string> — t() returns a string, so every wf.* access was undefined.
Replaced with individual leaf-key calls (workflowHelp.usage, .list, ...).

5. /discuss prompt-structure injection

User-supplied roles/stances were interpolated into the quoted
roleDescription/assignedStance strings unescaped, so a " in a role name
corrupts the generated prompt. Now escapes \ and " (and removes the dead
safeName variable that was computed but never used).

6. Changing theme/locale/editor wipes Astron settings

currentTuiConfig() hardcoded astron: DEFAULT_TUI_CONFIG.astron, so every
saveTuiConfig from the theme/locale/editor/update-preference flows reset
the user's Astron parameters to defaults. It is now async and seeds astron
from the persisted tui.toml (matching how AstronSettingsComponent itself
does load-modify-save).

7. createI18n ignores initialLocale when noDetect is set

options.noDetect ? 'en' : (options.initialLocale ?? detectLocaleNode())
made an explicit initialLocale lose to noDetect. Priority is now
initialLocale ?? (noDetect ? 'en' : detectLocaleNode()). Also exports the
previously instance-only getMessages/translateBatch at module level, and
fixes a JSDoc example referencing a non-existent key.

8. Footer pulse timer runs 12.5×/s forever

syncPulseTimer(state.thinkingEffort !== 'off') kept an 80 ms interval alive
permanently once thinking effort was enabled — constant re-renders while
idle. Now tied to actual activity: thinkingEffort !== 'off' && streamingPhase !== 'idle'.

9. Coding-plan editor accepts control keys as text

The input handler appended any non-Enter/Escape data to the field value, so
arrow keys / Tab / Ctrl combos leaked escape bytes (e.g. \x1b[C) into
config values. Now uses the codebase-standard printableChar filter (paste
still works).

10. Misleading error when resuming a session from another directory

run-v2-print.ts printed a "created under a different directory" hint on
stderr and then threw Session "..." not found — contradictory. It now
throws the sessionDifferentDir message (which carries the remediation
hint) directly.

Verification

• Scripted check: every t('<key>') in the touched files resolves to a
  string in both runtime locales — 0 missing.
• en.json/zh.json vs en.ts/zh.ts drift: 0 entries.
• EN/ZH key parity: identical key sets; placeholder sets equal (except the
  intentional {{plural}} omissions in zh, Chinese having no plural form).
• No malformed {{...}} placeholders remain in either locale.
• All touched .ts files parse cleanly (node --experimental-strip-types).
• Patch verified with git apply --check against current main.