Add any Hugging Face GGUF model, not just the curated catalog

[sachin-detrax]

Closes #27.

The local model list was a fixed array of nine models compiled into models-catalog.ts. Anything else on Hugging Face was unreachable without running llama-server by hand or waiting for a maintainer to ship a new release. Models are now open-ended.

A user-added entry is a full LocalModelDef with a custom- prefixed id, persisted in localModels.customModels (config v33 → v34; older files inherit []). loadConfig registers them in a catalog registry, so getLocalModelDef / isKnownLocalModelId resolve curated and custom entries through one lookup — daemon start, installer, TUI rows and CLI all picked them up without changes.

Entry points

• TUI — + Add a model from Hugging Face..., pinned under Local text models. Enter opens a prompt taking either a reference (resolve and add) or free text (search, then pick by digit).
• CLI — models add <ref> and models search <query>.
• Prompt — /models add and /models search.

References accepted

• repo URLs, /resolve/ and /blob/ file URLs
• hf://owner/repo[@rev]/file.gguf
• a pasted hf download ... command (one- or two-argument, trailing flags dropped)
• bare owner/name

Naming only a repo picks a 4-bit quant and any mmproj projector, so vision repos come out vision-capable. HF_TOKEN is honoured for gated repos, including on the weights download.

hf:// is parsed by hand rather than with new URL: that puts the owner in the host slot and lowercases it, and HF owners are case-sensitive, so hf://Qwen/... would silently 404.

Two pre-existing rendering defects fixed along the way

Both surfaced while testing this, and both could shred the panel on any daemon failure:

1. Multi-line daemon errors were written straight into a single-row status line, so a llama-server stack trace rendered 48–66 lines into a 24-row budget. toStatusLine() truncates at every error-message write and at the render point, with wrap="truncate-end" on the Ink Text.
2. The LlmPanel frame budget did not account for overlay modal / banner rows, so opening a modal during an error overran the frame. estimateOverlayRows() now covers them.

Regression tests pin the frame height for both.

Also

extractLoadFailure pulls the diagnostic reason out of llama-server logs so a failed load reports why rather than a generic message.

Tests

35 files changed, +2104/−52, including new suites for the HF reference parser, panel rendering, frame height, and the reducer.

npx tsc -p tsconfig.json --noEmit          # clean
npx vitest run src/local-llm/ src/tui/ src/cli/
#   before: 6 failed | 797 passed (803)
#   after:  6 failed | 835 passed (841)

The 6 failures are identical by name on main and on this branch (ChatLog/SplashBanner/TuiApp smoke, llm-panel selectors, persistEmbeddingHybridRecall) — pre-existing, untouched by this change. 38 tests added, none broken.

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