feat: replace prompt templates with snippets

Replace the prompt-template workflow with snippet support that is compatible with opencode snippet conventions. Snippets are now stored and loaded from global and project snippet directories, including legacy pluralized paths, with frontmatter metadata for aliases and descriptions. Snippet expansion supports recursive references plus prepend and append sections, while inject sections are treated as unsupported no-ops so OpenChamber remains compatible without requiring an external plugin.

Add the snippets settings experience and remove the old prompt-template settings surface. The new settings page and sidebar support creating, editing, deleting, selecting, and describing snippets, with localized copy across every supported locale. The settings navigation now exposes Snippets with a dedicated icon and metadata.

Wire snippets into all prompt-entry surfaces that need them. Chat, multi-run groups, and scheduled task prompts now offer hash-trigger snippet autocomplete and expand snippets before sending work to OpenCode. Chat also uses an adaptive compact placeholder on mobile or narrow composer widths so helper trigger guidance stays readable in constrained layouts.

Keep multi-run aligned with grouped prompts. Multi-run sessions now use a shared title builder that handles both legacy titles and the newer g1, g2 prompt-group title format. Fusion parsing now recognizes grouped multi-run titles, scopes fusion sources to the same prompt group, and creates fusion sessions under the matching group so outputs from different prompts are not mixed accidentally.

Harden the icon sprite pipeline. The sprite generator now discovers icon names used through typed icon maps, JSX icon props, IconName returns, and generated-value flows without scanning unrelated string literals or the generated sprite itself. The generated sprite is strictly typed so invalid icon names are caught by type checking, and existing invalid or unsafe icon references were cleaned up across settings, provider, Git identity, scheduled task, voice, header, and sidebar surfaces.

Update backend configuration routes and documentation for snippets. The OpenCode config route layer now exposes snippet CRUD and expansion endpoints, accepts JSON bodies for snippet writes, and removes the old prompt-template provider. Scheduled task runtime expansion now uses snippets before dispatching messages.

Add regression coverage for snippet storage and expansion, config-route JSON handling, and multi-run title parsing. Validated with full type checking, full linting, targeted multi-run title tests, and targeted OpenCode snippet/config route tests.

packages/ui/src/components/icon/sprite.ts

@@ -1,7 +1,7 @@
 // This file is auto-generated by scripts/generate-icon-sprite.mjs
 // Do not edit manually. Run the script to update.
 
-export const iconSpriteData: Record<string, string> = {
+export const iconSpriteData = {
   "add-circle": `<path d="M11 11V7H13V11H17V13H13V17H11V13H7V11H11ZM12 22C6.47715 22 2 17.5228 2 12C2 6.47715 6.47715 2 12 2C17.5228 2 22 6.47715 22 12C22 17.5228 17.5228 22 12 22ZM12 20C16.4183 20 20 16.4183 20 12C20 7.58172 16.4183 4 12 4C7.58172 4 4 7.58172 4 12C4 16.4183 7.58172 20 12 20Z" fill="currentColor"/>`,
   "add": `<path d="M11 11V5H13V11H19V13H13V19H11V13H5V11H11Z" fill="currentColor"/>`,
   "ai-agent-fill": `<path d="M12 2C17.5228 2 22 6.47715 22 12C22 17.5228 17.5228 22 12 22C6.47715 22 2 17.5228 2 12C2 6.47715 6.47715 2 12 2ZM12 15C9.71266 15 7.65042 15.961 6.19238 17.5C7.65042 19.039 9.71266 20 12 20C14.2871 20 16.3486 19.0387 17.8066 17.5C16.3486 15.9613 14.2871 15 12 15ZM12.4707 5.31934C12.2943 4.89337 11.7058 4.89339 11.5293 5.31934L11.2764 5.93066C10.8445 6.97341 10.0384 7.80621 9.02539 8.25684L8.30762 8.57617C7.89751 8.75905 7.89744 9.35625 8.30762 9.53906L9.06738 9.87695C10.0551 10.3163 10.8476 11.1193 11.2871 12.1279L11.5332 12.6934C11.7138 13.1073 12.2863 13.1073 12.4668 12.6934L12.7139 12.1279C13.1534 11.1194 13.9449 10.3163 14.9326 9.87695L15.6924 9.53906C16.1026 9.35624 16.1025 8.75907 15.6924 8.57617L14.9746 8.25684C13.9616 7.8062 13.1556 6.9734 12.7236 5.93066L12.4707 5.31934Z" fill="currentColor"/>`,
@@ -44,6 +44,7 @@ export const iconSpriteData: Record<string, string> = {
   "chat-ai-3": `<path d="M12 1.99996C12.8632 1.99996 13.701 2.10973 14.5 2.31539L14 4.25192C13.3608 4.0874 12.6906 3.99997 12 3.99997C7.58174 3.99997 4.00002 7.58172 4 12C4 13.3344 4.3255 14.6174 4.93945 15.7656L5.28906 16.4189L4.63379 19.3662L7.58105 18.7109L8.23438 19.0605C9.38255 19.6745 10.6656 20 12 20C16.4183 20 20 16.4183 20 12C20 11.6771 19.9805 11.3587 19.9434 11.0459L21.9297 10.8095C21.976 11.1999 22 11.5972 22 12C22 17.5228 17.5228 22 12 22C10.2975 22 8.69425 21.5746 7.29102 20.8242L2 22L3.17578 16.709C2.42541 15.3057 2 13.7025 2 12C2.00002 6.47714 6.47717 1.99996 12 1.99996ZM19.5293 1.3193C19.7058 0.893513 20.2942 0.8935 20.4707 1.3193L20.7236 1.93063C21.1555 2.97343 21.9615 3.80614 22.9746 4.2568L23.6914 4.57614C24.1022 4.75882 24.1022 5.35635 23.6914 5.53903L22.9326 5.87692C21.945 6.3162 21.1534 7.11943 20.7139 8.1279L20.4668 8.69333C20.2863 9.10747 19.7136 9.10747 19.5332 8.69333L19.2861 8.1279C18.8466 7.11942 18.0551 6.3162 17.0674 5.87692L16.3076 5.53903C15.8974 5.35618 15.8974 4.75895 16.3076 4.57614L17.0254 4.2568C18.0384 3.80614 18.8445 2.97343 19.2764 1.93063L19.5293 1.3193Z" fill="currentColor"/>`,
   "chat-history": `<path d="M12 2C17.5228 2 22 6.47715 22 12C22 17.5228 17.5228 22 12 22C10.298 22 8.69525 21.5748 7.29229 20.8248L2 22L3.17629 16.7097C2.42562 15.3063 2 13.7028 2 12C2 6.47715 6.47715 2 12 2ZM12 4C7.58172 4 4 7.58172 4 12C4 13.3347 4.32563 14.6181 4.93987 15.7664L5.28952 16.4201L4.63445 19.3663L7.58189 18.7118L8.23518 19.061C9.38315 19.6747 10.6659 20 12 20C16.4183 20 20 16.4183 20 12C20 7.58172 16.4183 4 12 4ZM13 7V12H17V14H11V7H13Z" fill="currentColor"/>`,
   "chat-new": `<path d="M14 3V5H4V18.3851L5.76282 17H20V10H22V18C22 18.5523 21.5523 19 21 19H6.45455L2 22.5V4C2 3.44772 2.44772 3 3 3H14ZM19 3V0H21V3H24V5H21V8H19V5H16V3H19Z" fill="currentColor"/>`,
+  "chat-thread": `<path d="M2 22L7.29117 20.8242C8.6944 21.5746 10.2975 22 12 22C17.5228 22 22 17.5228 22 12C22 6.47715 17.5228 2 12 2C6.47715 2 2 6.47715 2 12C2 13.7025 2.42544 15.3056 3.17581 16.7088L2 22ZM8.23428 19.0605L7.58075 18.711L4.63416 19.3658L5.28896 16.4192L4.93949 15.7657C4.32549 14.6175 4 13.3345 4 12C4 7.58172 7.58172 4 12 4C16.4183 4 20 7.58172 20 12C20 16.4183 16.4183 20 12 20C10.6655 20 9.38248 19.6745 8.23428 19.0605ZM15.4487 7H13.4411L13.2661 9.00024H11.2584L11.4334 7H9.42577L9.25077 9.00024H7V11.0002H9.0758L8.90082 13.0002H7V15.0002H8.72584L8.55089 17H10.5585L10.7335 15.0002H12.7411L12.5662 17H14.5738L14.7488 15.0002H17V13.0002H14.9237L15.0987 11.0002H17V9.00024H15.2737L15.4487 7ZM11.0834 11.0002H13.0911L12.9161 13.0002H10.9085L11.0834 11.0002Z" fill="currentColor"/>`,
   "check": `<path d="M9.9997 15.1709L19.1921 5.97852L20.6063 7.39273L9.9997 17.9993L3.63574 11.6354L5.04996 10.2212L9.9997 15.1709Z" fill="currentColor"/>`,
   "checkbox-blank-circle-fill": `<path d="M12 22C17.5228 22 22 17.5228 22 12C22 6.47715 17.5228 2 12 2C6.47715 2 2 6.47715 2 12C2 17.5228 6.47715 22 12 22Z" fill="currentColor"/>`,
   "checkbox-blank": `<path d="M4 3H20C20.5523 3 21 3.44772 21 4V20C21 20.5523 20.5523 21 20 21H4C3.44772 21 3 20.5523 3 20V4C3 3.44772 3.44772 3 4 3ZM5 5V19H19V5H5Z" fill="currentColor"/>`,
@@ -225,4 +226,4 @@ export const iconSpriteData: Record<string, string> = {
   "voice-recognition": `<path d="M4.99805 15V19H8.99805V21H2.99805V15H4.99805ZM20.998 15V21H14.998V19H18.998V15H20.998ZM12.998 6V18H10.998V6H12.998ZM8.99805 9V15H6.99805V9H8.99805ZM16.998 9V15H14.998V9H16.998ZM8.99805 3V5H4.99805V9H2.99805V3H8.99805ZM20.998 3V9H18.998V5H14.998V3H20.998Z" fill="currentColor"/>`,
   "volume-up": `<path d="M6.60282 10.0001L10 7.22056V16.7796L6.60282 14.0001H3V10.0001H6.60282ZM2 16.0001H5.88889L11.1834 20.3319C11.2727 20.405 11.3846 20.4449 11.5 20.4449C11.7761 20.4449 12 20.2211 12 19.9449V4.05519C12 3.93977 11.9601 3.8279 11.887 3.73857C11.7121 3.52485 11.3971 3.49335 11.1834 3.66821L5.88889 8.00007H2C1.44772 8.00007 1 8.44778 1 9.00007V15.0001C1 15.5524 1.44772 16.0001 2 16.0001ZM23 12C23 15.292 21.5539 18.2463 19.2622 20.2622L17.8445 18.8444C19.7758 17.1937 21 14.7398 21 12C21 9.26016 19.7758 6.80629 17.8445 5.15557L19.2622 3.73779C21.5539 5.75368 23 8.70795 23 12ZM18 12C18 10.0883 17.106 8.38548 15.7133 7.28673L14.2842 8.71584C15.3213 9.43855 16 10.64 16 12C16 13.36 15.3213 14.5614 14.2842 15.2841L15.7133 16.7132C17.106 15.6145 18 13.9116 18 12Z" fill="currentColor"/>`,
   "window": `<path d="M21 3C21.5523 3 22 3.44772 22 4V20C22 20.5523 21.5523 21 21 21H3C2.44772 21 2 20.5523 2 20V4C2 3.44772 2.44772 3 3 3H21ZM20 11H4V19H20V11ZM20 5H4V9H20V5ZM11 6V8H9V6H11ZM7 6V8H5V6H7Z" fill="currentColor"/>`,
-};
+} as const satisfies Record<string, string>;