memory: log pivot from usage panel to per-pane context-fill indicator

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

memory.md

@@ -57,7 +57,8 @@ Four-agent research pass (terminal-landscape, AI-orchestration, xterm/Tauri ecos
 
 **→ Exploring first (user-selected 2026-05-28):**
 - [x] ~~**Per-session cost / token tracking.**~~ Done (code) 2026-05-28 — **WSL-only v1, pending Windows runtime verify.** Backend `src-tauri/src/usage.rs` (`get_claude_usage(distros)` command): probes `$HOME` per distro via `wsl.exe`, reads `~/.claude/projects/*/*.jsonl` over the `\\wsl.localhost\<distro>` UNC share, tallies `message.usage` **per model per assistant line** (sessions can switch models). Cached by `(path,size,mtime)`; recency-capped 30d/50 sessions. Frontend: `src/lib/usage.ts` holds the editable pricing table (per-MTok, matched by opus/sonnet/haiku substring) + cost/format helpers; `UsagePanel.tsx` (MCP-panel modal pattern) lists sessions, highlights those whose transcript `cwd` matches an open pane (`[pane: label]`); titlebar 💰 total chip; App polls 20s (visible) / 5s (panel open); **Ctrl+Shift+U** opens it. **Design choice:** session-list attribution (not 1:1 pane binding) — avoids the unsolvable "2 claudes in one cwd" ambiguity. **Caveats:** cost is an estimate (cache-creation priced at 5m rate; rates hardcoded, may drift); panes with no explicit cwd (`~`) won't highlight; PowerShell/SSH show nothing. Plan: `~/.claude/plans/greedy-cooking-flask.md`.
-  - **Refined same day after user feedback:** (1) **Scope** — panel + titlebar chip now default to sessions matching open panes ("this workspace"), with an "open panes / all recent" toggle. The first cut summed *every* recent session on the distro (all projects, `/mnt` + home), which read as inflated. **Investigated the "double counting mounted folders + projects" report: NOT a real double count** — every transcript file is read exactly once, and no two project dirs share a cwd because claude resolves symlinks/mounts to the real path before mangling the project-dir name (e.g. the `~/claude/projects/tiletopia → /mnt/d/dev/tiletopia` symlink yields only `-mnt-d-dev-tiletopia`). The inflation was purely the global scope. (2) **Metric framing** — user is on a Pro/Max subscription where $ is meaningless (and `/usage` rate-limit quota can't be derived from transcripts); **tokens are now the headline**, the API-cost estimate is a labeled secondary `~$` kept visible so the user can validate it against real API billing at work. **Open question:** accuracy of the $ estimate vs actual API billing — user will check at work.
+  - **PIVOTED 2026-05-28 → per-pane context-fill indicator (replaces the panel).** User decided lifetime token totals + $ aren't worth it on a subscription; what's actionable is *current context-window occupancy* per pane (spot the one needing `/compact`). Removed `UsagePanel`, the 💰 titlebar chip, and `Ctrl+Shift+U`. Repurposed `usage.rs`: `get_pane_context` returns each recent session's **current** occupancy = the LAST assistant turn's `input + cache_read + cache_creation` tokens (verified ~274k on this 1M session). `src/lib/usage.ts` now does window inference (200k vs 1M by whether occupancy already exceeds 200k — model id doesn't encode the variant), %, color ramp. App polls 15s (visibility-gated) → `cwd→SessionContext` map via orchestration; `LeafPane` renders a slim fill bar + % in the header, matched by `leaf.cwd`. **Also fixed narrow-pane toolbar** (user report: close × clipped when slim): a `ResizeObserver` in LeafPane sets `leaf--narrow`/`leaf--xnarrow` tiers; label shrinks first, split/status/secondary chips drop by tier, close × + context indicator stay pinned-right + visible down to the 180px min. Plan: `~/.claude/plans/greedy-cooking-flask.md` (rewritten for the pivot). **Pending Windows runtime verify.** Window-size 200k/1M is inferred (approx near boundary); `~`-spawned / cd'd panes may not match their session.
+  - **Superseded — original lifetime-token panel refinements (kept for history):** (1) **Scope** — panel + titlebar chip now default to sessions matching open panes ("this workspace"), with an "open panes / all recent" toggle. The first cut summed *every* recent session on the distro (all projects, `/mnt` + home), which read as inflated. **Investigated the "double counting mounted folders + projects" report: NOT a real double count** — every transcript file is read exactly once, and no two project dirs share a cwd because claude resolves symlinks/mounts to the real path before mangling the project-dir name (e.g. the `~/claude/projects/tiletopia → /mnt/d/dev/tiletopia` symlink yields only `-mnt-d-dev-tiletopia`). The inflation was purely the global scope. (2) **Metric framing** — user is on a Pro/Max subscription where $ is meaningless (and `/usage` rate-limit quota can't be derived from transcripts); **tokens are now the headline**, the API-cost estimate is a labeled secondary `~$` kept visible so the user can validate it against real API billing at work. **Open question:** accuracy of the $ estimate vs actual API billing — user will check at work.
 - [ ] **Smart link providers.** `terminal.registerLinkProvider()` to make file paths (`src/foo.ts:12:3`), `localhost:PORT`, and error locations clickable — more flexible than the regex-only web-links addon already loaded. Open file in editor / browser. Difficulty: medium.
 - [x] ~~**Find in scrollback.**~~ Done + **verified on Windows 2026-05-28** — `@xterm/addon-search` + new `src/components/SearchBar.tsx`/`.css` overlay, Ctrl+Shift+F open / Enter / Shift+Enter / Esc, regex + case toggles, decoration highlight.
 - [x] ~~**Unicode 11 + grapheme width.**~~ Done + **verified on Windows 2026-05-28** — `@xterm/addon-unicode11` loaded after CanvasAddon, `term.unicode.activeVersion = '11'`. (Skipped the separate `addon-unicode-graphemes` for now.)