Providers as data; add Ollama and Custom endpoints

Every gateway provider is now an entry in providers.json - endpoint and auth
template, how its model list is read, how it is probed before a switch, what
setup asks, which doctor checks apply, and its title, colour and logo -
installed next to the presets and read by all three consumers: the bash CLI
(through cm-json.py), the Windows script, and the bar widget (through
health.json). anthropic stays built in; it is the native login, not a gateway.

Behaviour that differs in kind stays in code, chosen by name from the entry:
catalogue parsers (openrouter, lmstudio, ollama, openai, static), probe rules
(always, lenient, local), and named doctor checks. A provider that reuses them
is an entry and a default preset, with no code. The widget draws providers
from health.json, so a new one needs no QML change and no shell restart.

The existing three are unchanged in behaviour: their blank presets come out
byte-identical from the file, and setup, doctor, models and the picker run the
same checks through the generic paths.

Ollama: local server on :11434, placeholder token, one model for every tier,
models from /api/tags. doctor reads the context each loaded model actually runs
with (/api/ps) and its maximum (/api/show), because Ollama defaults to 4096
tokens unless OLLAMA_CONTEXT_LENGTH is set and silently truncates past it. A
bare model name matches its :latest tag.

Custom: any Anthropic-compatible endpoint. Ships with no address and is refused
until it has one; key optional; models from /v1/models when the endpoint has a
list, and a lenient probe so a proxy without one is not blocked.

Also: preflight (and Set-ClaudeMode on Windows) refuses a preset with no
server address; the server form, setup and set-auth use each provider's own
default URL, key name and placeholder token instead of LM Studio's; the
Windows build gains the no-models and no-address guards it never had.
Tested on Linux against fake Ollama/Custom servers, and on Windows 5.1 in a
USERPROFILE sandbox on winbox.

1.12.0.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

omarchy/smoido.claude-mode/BarWidget.qml

@@ -42,6 +42,38 @@ BarWidget {
   }
   readonly property bool known: mode !== ""
 
+  // ---- Providers
+  //
+  // claude-mode publishes its providers in health.json - how to draw each one
+  // and which panel features it has - so one added to providers.json appears
+  // here without this file or Modes.js changing (and Modes.js cannot change
+  // without a shell restart). Modes.js stays the fallback: for anthropic,
+  // which is the native login and never in the list, and for a health.json
+  // written before the list existed. The panel asks through these, too.
+  readonly property var providerList: health && health.providers ? health.providers : []
+  readonly property var modeOrder: {
+    if (providerList.length === 0) return Modes.ORDER
+    var out = ["anthropic"]
+    for (var i = 0; i < providerList.length; i++) out.push(String(providerList[i].id))
+    return out
+  }
+
+  function providerInfo(m) {
+    for (var i = 0; i < providerList.length; i++) {
+      if (String(providerList[i].id) === m) return providerList[i]
+    }
+    return null
+  }
+  function modeTitle(m) { var p = providerInfo(m); return p && p.title ? String(p.title) : Modes.title(m) }
+  function modeBlurb(m) { var p = providerInfo(m); return p ? String(p.blurb || "") : Modes.blurb(m) }
+  function modeLogo(m) { var p = providerInfo(m); return p ? String(p.logo || "") : Modes.logo(m) }
+  function modeLogoScale(m) { var p = providerInfo(m); return p && p.logoScale ? Number(p.logoScale) : Modes.logoScale(m) }
+  function modeGlyph(m) {
+    var p = providerInfo(m)
+    if (p && p.glyph) return String.fromCodePoint(parseInt(String(p.glyph), 16))
+    return Modes.glyph(m)
+  }
+
   // Measured against the neighbours: every stock bar glyph in this shell paints
   // 11px of ink from a 13px font. These marks fill their box rather than
   // carrying a font's internal padding, so the box itself has to be the smaller
@@ -54,8 +86,8 @@ BarWidget {
     var n = Math.round(Number(root.setting("iconSize", Style.bar.iconFont)))
     return n % 2 === 0 ? n + 1 : n
   }
-  readonly property string logo: Modes.logo(mode)
-  readonly property string glyph: Modes.glyph(mode)
+  readonly property string logo: modeLogo(mode)
+  readonly property string glyph: modeGlyph(mode)
   readonly property string label: Modes.shortLabel(mode, preset)
 
   // A gateway mode is spending money or leaning on a local server; native
@@ -226,7 +258,7 @@ BarWidget {
         id: icon
         anchors.fill: parent
         pathData: root.logo
-        opticalScale: Modes.logoScale(root.mode)
+        opticalScale: root.modeLogoScale(root.mode)
         color: root.activeColor
         iconSize: root.iconPx
       }
@@ -282,7 +314,7 @@ BarWidget {
 
   function tooltipLabel() {
     if (!root.known) return "claude-mode: not installed"
-    var lines = [Modes.title(root.mode)]
+    var lines = [root.modeTitle(root.mode)]
     if (root.preset !== "") lines.push("preset " + root.preset)
     var models = root.health && root.health.models ? root.health.models : null
     if (models && models.opus) lines.push("opus " + models.opus)